8051 ADB Board Manual

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www.pantechsolutions.net 8051 Advanced Development Board User Manual

8051 Advanced Development Board

User Manual

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CONTENTS

1. Introduction

Technical/Customer Support ............................................................. 3

Package contains ............................................................................. 4

Board Introduction ........................................................................... 5

2. Connectors and Jumper Details................................................................ 9

3. Power Supply Block .............................................................................. 12

4. ZIF Socket Details ............................................................................... 12

5. Flash programmers .............................................................................. 13

6. Onboard Peripheral/Interface Details ...................................................... 17

6.1 - Point LEDs ............................................................................ 18

6.2 – Digital Inputs Toggle Switches ................................................ 21

6.3 - LCD 2x16 in 8-bit mode .......................................................... 23

6.4 - GLCD 128x64 ....................................................................... 27

6.5 - UART RS-232 Communication ................................................. 32

6.6 - Real Time Clock ..................................................................... 36

6.7 – I2C EEPROM ......................................................................... 43

6.8 - 7 Segment LED ..................................................................... 48

6.9 - Interrupts ............................................................................. 52

6.10 - DS1820 (Digital Thermometer) .............................................. 53

6.11 - Matrix keypad ...................................................................... 57

6.12 - Stepper Motor Driver ............................................................ 62

6.13 - Relay Driver ........................................................................ 64

6.14 – SPI DAC ............................................................................. 66

6.15 – RS-485 .............................................................................. 68

6.16 – PS/2 ................................................................................. 70

6.17 – Ethernet ............................................................................ 73

6.18 – ADC On-Chip ...................................................................... 76

6.19 – CAN .................................................................................. 79

7. Board Layout....................................................................................... 81

9. Easy Programming Steps ...................................................................... 82

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Technical or Customer Support

E-mail questions to [email protected]

Send questions by mail to

Pantech Solutions Pvt Ltd.,

#3/2, Ramachandran Street,

Off: North Usman Road,

T.Nagar

Chennai – 600 017.

Tamilnadu

India

Phone : +91-44-4260 6470

Fax : +91-44-4260 6480

Website : www.pantechsolutions.net

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Packages

• 8051 ADB Development module

• Serial Port Cable (Dallas/Philips Controller Program)

• Parallel to Serial Cable (Atmel ISP)

• 10-pin FRC Cables

• Printed User Manual

• CD contains

o Software (Programmers, IDE)

o Example Programs

o User Manual

o Simple Projects

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1. Introduction

Pantech Solutions’ Embedded Advanced Development module is proposed to smooth

the progress of developing and debugging of various designs encompassing 8051

Microcontrollers from Philips / Atmel/ Dallas. The intention of the design is to endorse

the engineers to exercise and explore the capabilities of 8051 microcontrollers with

many communication protocol ease. The board is compatible with 40-DIP/44-PLCC

pin Microcontrollers. The kit is designed so as to facilitate separate On-board ISP

Programmer for Atmel microcontrollers and Philips Microcontroller through ISP on

serial port. Programming can be done without detaching the Microcontroller from the

ZIF socket.

It provides a complete development platform with different modules interface that

accelerates the task of designers to run application software on target 8051

hardware, thereby paving a platform to benchmark their system, save time &

expense of building their own application test board and enabling them to get their

designs to market quickly. Many real world applications can be tested on the board.

RS485, RTC, DAC, Digital Temperature controllers, Motor drivers, Memory

interfacing, counters, timers...

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General Block Diagram

AT89SXX AT89C51CC0X

DS89C4XX P89C51RD2

PS/2

Keyboard

10-bit ADC

(AT89C51CC03)

SPI – DAC MCP4921

I2C

EEPROM

128x64 GLCD

2x16 LCD

I2C

Real Time Clock

CAN 2.0

(MCP2551)

Stepper Motor Termination

8 Nos.

Point LEDs

Two

Ext Interrupts

PWM

(AT89C51CC03)

2XRS232

10Mbps Ethernet

9V AC/DC Input

5V Regulator

Two Relay Outputs

4x4 Matrix

Keypad

1-Wire

Temp Sensor

RS485

Parallel/Serial

ISP Programmer

3.3V Regulator Ethernet supply

4 Nos. Seven

Segment Display

8 Nos.

Digital Inputs

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Specifications

• Supported Microcontrollers :

SOCKET1 (40-DIP)

Atmel : AT89S51/52/8252 and AT89Sxx

NXP : P89V51Rxx

Dallas : DS89C420/430/450

SOCKET2 (44-PLCC)

Atmel : AT89S51/52/8252 and AT89Sxx MCUs

NXP : P89V51Rxx

Dallas : DS89C420/430/450

SOCKET3 (44-PLCC)

Atmel : AT89C51CC01/02/03 (CAN Controllers)

T89C51CC01/02/03

• External Peripheral Modules

� 128X64 GLCD Interface

� 2x16 Character LCD with Contrast adjust

� 10Mbps Ethernet Interface.

� 4-Nos. of common anode seven segment display.

� 8-Nos. General purpose Point LEDs.

� 8-Nos. of Toggle switches (Digital Inputs).

� 4x4 Matrix keypad.

� Stepper Motor Driver Output.

� Two Nos. of 5V Relay with termination.

� PS/2 keyboard Interface.

• Communication Protocols

� CAN (2.0A and 2.0B) (Bosch)

� I2C Two Wire Interface (Philips-NXP)

� SPI (Motorola)

� 1-wire Technology (Maxim-Dallas)

� Two Full Duplex UART (EIA)

� RS485 (EIA)

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• Other Features

� Digital to Analog Converter.

� Real Time Clock with Battery Backup.

� Serial EEPROM memory.

� Digital Temperature sensor

� RS485 serial communication through long distance(>200m)

� Two UART for serial port communication through PC.

� ISP In-System Programming for NXP, Dallas and Atmel CAN controllers.

� Parallel programmer for Atmel AT89S5X family controllers.

� Two pushbuttons for Interrupts study.

� Two Nos. of On-board potentiometer for ADC input testing of Atmel AT89C51CC03

controller

� Easy to mount 40-pin DIP Devices (ZIF socket).

� MCU Socket selectable jumpers.

� Controlling of multifunction through DIP Switch.

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2. Connectors and Jumper Details

CN3 - 10PIN Box Header ( PORT 0 )

VCC

P0.1

P0.5P0.6

CN3

PORT 0

1 23 45 67 89 10

P0.4P0.2P0.0

P0.7

P0.3

P0.[0..7]P0.[0..7]

Connector

Pin

Numbers

MCU Pin

Name

Connector

Pin

Numbers

MCU Pin

Name

1 P0.0 2 P0.1

3 P0.2 4 P0.3

5 P0.4 6 P0.5

7 P0.6 8 P0.7

9 VCC 10 GND


P1.[0..7]P1.[0..7]

VCC

CN2

PORT 1

1 23 45 67 89 10

P1.3P1.5P1.7

P1.1

P1.4

P1.0

P1.6

P1.2

Connector

Pin

Numbers

MCU Pin

Name

Connector

Pin

Numbers

MCU Pin

Name

1 P1.0 2 P1.1

3 P1.2 4 P1.3

5 P1.4 6 P1.5

7 P1.6 8 P1.7

9 VCC 10 GND

10



P2.0 P2.1

P2.5P2.7

P2.3

P2.[0..7]

VCC

CN4

PORT 2

1 23 45 67 89 10

P2.6P2.4P2.2

P2.[0..7]

Connector

Pin

Numbers

MCU Pin

Name

Connector

Pin

Numbers

MCU Pin

Name

1 P2.0 2 P2.1

3 P2.2 4 P2.3

5 P2.4 6 P2.5

7 P2.6 8 P2.7

9 VCC 10 GND


P3.4

P3.[0..7]P3.[0..7]

VCC

P3.1

P3.5P3.3

P3.7

CN5

PORT 3

1 23 45 67 89 10

P3.6

P3.0P3.2

Connector

Pin

Numbers

MCU Pin

Name

Connector

Pin

Numbers

MCU Pin

Name

1 P3.0 2 P3.1

3 P3.2 4 P3.3

5 P3.4 6 P3.5

7 P3.6 8 P3.7

9 VCC 10 GND

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JP2 – 6pin Header (Power select for MCU)

CAN_VCC

JP2PWRSLT_MC

246

135

MC1_VCCMC2_VCC

VCC

Jumper for Enable Power to MCU

• Short Pin 1&2 of JP2(+5V, to MCU1 socket)

• Short Pin 3&4 of JP2(+5V, to 44pin plcc socket MCU)

• Short Pin 5&6 of JP2(+5V, to 44pin plcc AT89C51CC03 CAN controller)

Connector

Pin

Numbers

Signal

Name

Connector

Pin

Numbers

Signal

Name

1 VCC 2 MCU1(40-Dip)-8051

3 VCC 4 MCU2(44-PLCC)-8051

5 VCC 6 MCU3(AT89C51CC03CAN

Note : short jumpers only one at a time, otherwise it executes fault operation.

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3. Power Supply

The external power can be AC or DC, with a voltage between (9V/12V,1A output) at

230V AC input. The 8051 board produces +5V using an LM7805 voltage regulator,

which provides supply to the entire device on the board. USB socket meant for power

supply only, user can select either USB or Ext power supply through JP1. Separate

On/Off Switch for controlling power to the board.

JP1POWER

1 2 3

C30.1uf

D2

5V1

- +

D1BRIDGE

1

4

3

2

C2470uf

U1 78XX/TO

VIN1

VOUT3

GN

D2

J1

POWER JACK

12

CN1USB

VC

C1

D-

2

D+

3

GN

D4

GND5

GND6

SW3

SW KEY-SPST

1 2

R1330E

D3LED

4. MCU Sockets

• The 8051-development board is delivered with ATMEL’s 40-pin & 44pin CAN

Controller Microcontroller. User can remove this and fit different microcontroller

DIP40 packages of an adequate pin out.

• NOTE : Since all packages have parallel connections, there must not be more than

One Microcontroller on the board at a time.

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5. Flash Programming Utility

1. NXP (Philips)

NXP Semiconductors produce a range of Microcontrollers that feature both on-chip

Flash memory and the ability to be reprogrammed using In-System Programming

technology.

SW4

SW DIP-10

M_TXD0M_RXD0P3.1

P3.0

Programming Mode

SW4 (pin 9) make it ‘on’

(PSEN low), program

mode NXP (Philips)

microcontrollers.

Execution Mode

SW4 (pin 9) make it ‘off’

(PSEN nil), execution

mode NXP (Philips)

microcontrollers.

Note : Detailed Manual available at “Flash Magic” Help menu - Manual.

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2. ATMEL Microcontroller ISP

Note : Atmel Microcontrollers (PGM mode), user can select switch settings to color

shaded position.(EXE Mode) disable switches to off position.

P1.5P1.7

P1.6

SW32

SW DIP-4

MC_RST

Note : Detailed Manual available for

\8051ADB\Softwares\Programmers\AT89ISP\User Manual.pdf

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2. Dallas Microcontroller ISP

MC_RST

SW4

SW DIP-10

R24K7

VCC

R34K7

VCC

EA

R4330E

VCC D4LED

PSEN

M_TXD0M_RXD0P3.1

P3.0

Note : Dallas Microcontrollers (PGM mode), user can select switch settings to color

shaded position.(EXE Mode) disable switches to off position.

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2. ATMEL CAN Microcontroller ISP

SW4

SW DIP-10

R24K7

VCC

R34K7

VCC

EA

R4330E

VCC D4LED

PSEN

M_TXD0M_RXD0

P3.0P3.1

Note : Atmel CAN Microcontrollers (PGM mode), user can select switch settings to

color shaded position(EXE Mode) disable switches to off position.

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6. On-board Peripherals

The Development board comes with many interfacing options

• 8-Nos. of Point LED’s (Digital Outputs).

• 8-Nos. of Toggle switches (Digital Inputs).

• 2 Lines X 16 Character LCD Display.

• 128X64 GLCD Interface

• Real Time Clock with battery backup.

• 4 Nos. of Seven-segment display.

• Digital Temperature Sensor

• 4 X 4 Matrix keypad.

• Relay / Stepper Motor driver circuit.

� Digital to Analog Converter.

� Serial EEPROM memory.

� RS485 serial communication through long distance(>200m)

� Two UART for serial port communication through PC.

� PS/2 keyboard Interface.

� 10Mbps Ethernet Interface.

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6.1 - Light Emitting Diodes

• Light Emitting Diodes (LEDs) are the most commonly used components, usually

for displaying pin’s digital states.

• The 8051 Development Board have 8 nos., of Point LED, user can interface the

point LEDs with any port. User can use P0, P1, P2 and P3 ports.

• Connector CN8 for LED connector, when High Level goes to the pin LED glows.

CN8

LED

1 23 45 67 89 10

LED

1

LED

2

LED

3

LED

4

LED

5

LED

6

LED

7

LED

8

C R11

470E

12 3 4 5 6 7 8 9

D2D3 D4

D8D5D7

D6

D1

D1

D5D4D3 D7 D8D6D2

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/*------------------------------------------------- -------------------------*/

/* Example : Program to shift LED’s Left and Right */

/*------------------------------------------------- -------------------------*/

/* Filename :LED_Flash.c Date:29/05/06 */

/* */

/* Company :PANTECH SOLUTIONS */

/*------------------------------------------------- -------------------------*/

/* LED Port(CN8) : Port1 P1(CN2) */

/*------------------------------------------------- -------------------------*/

#include <stdio.h>

#include <REG51.H>

#define LED P1 //define prot for LED

void delay(void); //Delay function

void led_left(void); //LED_Left

void led_right(void); //LED_Right

unsigned int j;

//----------------------------------

//LED LEFT FUNCTIONS

//----------------------------------

void led_left()

{

for (j=0x01; j<=0x80; j<<=1)

{

LED = j;

delay();

}

}

//----------------------------------

//LED RIGHT FUNCTIONS

//----------------------------------

void led_right()

{

for (j=0x40; j>=0x01; j>>=1)

{

LED = j;

delay();

}

}

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//----------------------------------

//Delay Functions

//----------------------------------

void delay(void)

{

unsigned int i;

for (i=0;i<10000;i++)

{;}

}

//----------------------------------

// Main Program Starts

//----------------------------------

void main (void)

{

LED = 0x00; //Initialize to 0x00

while (1) //Loop forever

{

led_left(); //scroll left

delay();

led_right(); //scroll right

}

}

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6.2 – Digital Inputs Toggle Switch

• This is another simple interface, 8-Nos. of toggle switch, mainly used to give an

input to the port lines, and for some control applications also.

• User can change the level of digital inputs whatever they want, either high or low

by simply selecting the jumper J3. The switches are connected to +5V, in order to

detect a switch state, pull-up or pull-down resistors should be used.

R1010K

12 3 4 5 6 7 8 9

J3

CON3

123

VCC

GND

SW

181

2

SW

191

2

SW

201

2

SW

211

2

SW

221

2

SW

231

2

SW

241

2

SW

251

2

SS3SS5

SS1SS4

SS7SS6

SS2

SS8

CN6

SLIDE_SWITCH

1 23 45 67 89 10

SS

1

SS

2

SS

3

SS

4

SS

5

SS

6

SS

7

SS

8

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/*------------------------------------------------- -------------------------*/

/* Example : Program for DIP Switch Interface */

/*------------------------------------------------- -------------------------*/

/* Filename :DIPswitch.c D ate:29/05/06 */

/* */


/*------------------------------------------------- -------------------------*/

/* Note : The DIP switch is connected to the port-2 active low '0' */

/* and the LED to the port-0. */

/*------------------------------------------------- -------------------------*/

#include<reg51.h> //Define 8051 Registers

#define SW P2 //Define Switch to Port2

#define Led P0 //Define Led to Port0

//----------------------

// Main Function

//----------------------

void main()

{

P2=0xff; //Port-2 as input to FFh

P0=0x00; //Port-0 as output to 00h

while(1) //Loop Forever

{

Led=SW; //Assign the Switch value to Led

}

}

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6.3 - LCD 2x16 IN 8-BIT MODE

• When using a character LCD in an 8-bit mode, the connector CN10 connects the LCD

to Microcontroller port lines. User can use LCD Data lines to Port P0, P1 and P2, not

P3, because P3 lines P3.5 (RS), P3.6(R/W) and P3.7 (Enable) connected by default.

The LCD’s contrast can be adjusted by varying the trimpot (R13).

• Before using LCD insert the shunt or shorting link of jumper J5 mentioned to CHAR

legend mark.

• Place 2x16 Character LCD to proper place, mentioned legend in PCB.

R19 10EVCC

VCC

J4

GLCD128X64

123456789

1011121314151617181920

GD3GD2GD1

GD4GD6 GD7

GD5

CN10

GLCD

1 23 45 67 89 10

GD4

GD0

GD2

GD6GD5

GD7

GD3

GD1

VCCGNDR13

10K

13

2

P3.7P3.6P3.5

RST

GD0

J5

CON3

123

2x1

6 L

CD

CHAR

GLCD

Note: Possible ways to interface LCD (Not CN5).

LCD CON MCU CON

1. CN10 CN2

2. CN10 CN3

3. CN10 CN4

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/*------------------------------------------------- -------------------------*/

/* Example :Program to Display Message in LCD 8 Bi t Mode */

/*------------------------------------------------- -------------------------*/

/* Filename :lcd8bit.c Date:29/05/ 06 */

/* */


/*------------------------------------------------- -------------------------*/

/* Note :To display a message in LCD 8 bit mode. */

/*------------------------------------------------- -------------------------*/

#include <reg51.h> //Define 8051 Registers

#include <stdio.h> //Def ine I/O Functions

#define DATA P1 // Define DATA to Port1

//Define control pins

sbit RS = P3^5; //Register Select

sbit RW = P3^6; //LCD Read /Write

sbit lcd_e = P3^7; //LCD Enab le

code unsigned char msg[] = (" 8051 ADVANCED "); //Display the message

code unsigned char msg1[] = (" ADB BOARD ");

//----------------------------------

// LCD Functions

//----------------------------------

void lcd_init(void);

void lcd_cmd(unsigned char);

void lcd_display(unsigned char);

void DelayMs(int);

//----------------------------------

// LCD command Function

//----------------------------------

void lcd_cmd(unsigned char cmnd)

{

DATA = cmnd;

RS = 0;

RW = 0;

lcd_e = 1;

DelayMs(35);

lcd_e = 0;

}

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//----------------------------------

// LCD Data Function

//----------------------------------

void lcd_display(unsigned char dat)

{

DATA = dat;

RS = 1;

RW = 0;

lcd_e = 1;

DelayMs(35);

lcd_e = 0;

}

//----------------------------------

// LCD Delay Function

//----------------------------------

void DelayMs(int k)

{

unsigned int a;

for(a=0;a<=k;a++);

}

//----------------------------------

// LCD Initialization

//----------------------------------

void lcd_init(void)

{

unsigned char i;

lcd_cmd(0x38); //2x16 Character 5x7 dot

DelayMs(15); //matrix LCD,8-bit format

lcd_cmd(0x0c); //Display On, cursor o ff

DelayMs(15);

lcd_cmd(0x06); //Shift Cursor to right

DelayMs(15);

lcd_cmd(0x01); //Clear display scree n

DelayMs(15);

//-------------------------------------------

// First Line Message Display

//-------------------------------------------

lcd_cmd(0x80); //First Line Initiali zation

DelayMs(35);

i=0;

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while(msg[i]!='\0')

{

lcd_display(msg[i]);

i++;

}

DelayMs(50);

//-------------------------------------------

// Second Line Message Display

//-------------------------------------------

lcd_cmd(0xc0); //Second Line Init ialization

DelayMs(35);

i=0;

while(msg1[i]!='\0')

{

lcd_display(msg1[i]);

i++;

}

DelayMs(50);

while(1);

}

//----------------------------------

// LCD Main Program

//----------------------------------

void main(void)

{

lcd_init(); //LCD Initial ization

DelayMs(50);

while(1); //Loop Forever

}

27


6.4 - 128X64 Graphic LCD

• When using a Graphic LCD, the connector CN10 connects the LCD to Microcontroller

port lines. User can use GLCD Data lines to Port P0, P1 and P2, not P3, because P3

lines P3.3(CS1), P3.4(CS2), P3.5(RS), P3.6(R/W) and P3.7 (Enable) connected by

default. The LCD’s contrast can be adjusted by varying the trimpot(R13).

• Before using LCD insert the shunt or shorting link of jumper J5 mentioned to GLCD

legend mark. Adjust(R13) for GLCD Negative Voltage

• Place GLCD to proper place, mentioned in PCB.

R19 10EVCC

VCC

J4

GLCD128X64

123456789

1011121314151617181920

GD3GD2GD1

GD4GD6 GD7

GD5

CN10

GLCD

1 23 45 67 89 10

GD4

GD0

GD2

GD6GD5

GD7

GD3

GD1

VCCGND

R1310K

13

2

P3.7P3.6P3.5

RST

GD0

J5

CON3

123

GL

CD

12

8x6

4

GLCD

CS1CS2

Note: Possible ways to interface LCD (Not CN5).

LCD CON MCU CON

1. CN10 CN2

2. CN10 CN3

3. CN10 CN4

28


/*------------------------------------------------- -------------------------*/ /* Example :Program to Display Picture in GLCD 128 x64 */ /*------------------------------------------------- -------------------------*/ /* Filename :GLCD.c Date:10/01/08 */ /* */ /* Company :PANTECH SOLUTIONS * / /*------------------------------------------------- -------------------------*/ /* Note :To display a image in page0 & 1 */ /*------------------------------------------------- -------------------------*/ #include <reg51.h> //Define 8051 Registers #include <stdio.h> //Define I/O Functions #define DATA P2 //Define DATA to Port1 //Define control pins sbit CS1 = P3^3; //CS1 select LCD IC1 sbit CS2 = P3^4; //CS2 select LCD IC2 sbit RS = P3^5; //Register Select sbit RW = P3^6; //LCD Read/Write sbit lcd_e = P3^7; //LCD Enable //sbit RST = P3^7; //#define size 1024 void GLCD_PutPicture(const unsigned char *); //For method 3 void Select_page(unsigned char); int i; code unsigned char carsun_bmp[1024] ={ 0, 0, 0, 0, 4, 10, 58, 62,122,210,208,208,208,208,208, 48, 188, 60,172,172,246,247,255,110,254,190,126,126, 9 2,152, 96, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 128,128,128,128, 0,129,129,141,143,136,192, 80,208,200, 8, 8, 140, 12, 58, 58, 71,130,135, 0,161,208,112,240,16 0,166,166,153, 139,142,141,143, 15, 27, 23, 23, 27, 15, 15,143,190,187,191,159, 204,140,143,246,246,246,230,189,255,177,189,238,19 5, 76, 0, 0, 0, 0, 0, 0, 0, 0, 0, 24, 28,222,126,123, 57, 63,125,120, 15, 15, 3, 3, 65,193,225,193,192,192, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 98, 99, 29, 153,192, 66,199,132,132,133,135, 0, 0,128, 80,120, 81,113, 118, 126, 63, 31, 22,227,253,248,224,192,193,194,194,19 4,195,129, 0, 1,131,131,191,191,230,234,234,188,248,241,195, 66, 71,129,133, 133,174,255,255,247,255,255,254,254,255,251,253,21 0,208, 0, 0, 0, 0, 0, 0, 32, 60, 52,247,254,241,245,239,255,188,182,254, 252,230,243,233,247,151,153,255,247,243,223,221,25 2,120,120,248, 104,120,248,112,112, 48, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1 6, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 31, 31, 31, 31, 17, 17, 17, 17, 1 7, 17, 17, 18, 18, 25, 25, 44, 15, 31, 63, 63,111,127, 58, 63,119,119,255,191, 53, 22, 31, 11, 31, 31, 47, 63, 63,255,207,255,25 5, 47, 37, 0, 0, 0, 0, 0, 0, 0, 32,251,255,255,255,255,255,131,129,193,

29


227,227, 51, 55,229,199, 7, 15, 11, 27, 31, 28, 5 6,240, 96, 96, 97, 97, 97, 97, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96,224, 96, 96, 96, 96, 96, 9 6, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 9 6, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 96, 97, 99, 98,102,108,248,240, 96, 96, 0,255,255,255,25 5, 0, 0, 0, 0, 0, 0, 0, 2, 23, 29, 33, 33,255,255,255,255,167,167, 58, 24,120,248,232,121,123,122,158,144, 0,252,158,15 9,127, 96,128, 14, 10, 10, 10, 10, 10, 10, 14, 0, 0, 0, 14, 10, 10, 10, 10, 10, 14, 14, 0, 0,128,255,248,232,192,192,254,25 4,254, 34, 34, 34, 34, 34, 34,254, 34, 34, 34, 34, 34, 34, 34,254,254,254, 50, 0, 0, 0,254,130,186, 58, 58, 98, 98, 98, 98, 2,254, 0, 0, 0,254,254,254,254, 34, 34, 34, 34,254,254, 34, 34, 34, 34, 34, 254,254,254,224,127,255,194,222,126,255,255,255,25 5, 0, 0, 0, 0, 0, 0, 0, 0,128,128,128, 96,191,255,127,255,255,225,195, 207,140,137, 8, 8, 8, 8, 25, 63, 59, 11, 79, 7 9, 73,233,254, 168,160,160, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 60, 63, 39, 47, 63, 63,125, 73, 9,225, 64, 72, 120,120,120,121, 73, 65, 77, 81, 25,121, 73,121, 49,113, 73, 73, 200,200,120,127, 80, 81, 64, 64, 64, 80, 80,240,22 4,127, 24,152, 144,201,233,249,249, 56,136, 8,144,241,121,120,160,248,240,112, 9,121, 63,127,120,104, 77, 76,124,255,255,255,25 5,248, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 3, 3, 3, 6, 6, 12, 12, 24, 24, 16, 48, 32, 96, 96, 192,192,128,128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 2, 2, 6, 6, 0, 0, 4, 0, 0, 2, 2, 34, 98, 98,208,209,145, 145, 16, 16, 16, 8, 8, 8, 4, 6, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,128,128,192,192,224,224,248,231,239,255,11 9, 67, 0, 0, 0, 0, 0, 0, 0, 0, 0,128,128, 0,192,192,192,192,192,192, 192,192,192,192,192,192,192,192,192,192,192,192,19 2, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 64, 96, 64, 64, 65, 65, 99, 99, 98,102,102,108,108,120,12 0,120,112,112, 32, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 3, 2, 6, 6, 12, 12, 24, 24, 48, 48, 4 8, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 48, 16, 16, 0, 0, 0, 0, 0, 0,}; //---------------------------------- // LCD Functions //---------------------------------- void GLCD_Init(); void GLCD_Data(unsigned char); void GLCD_Comd(unsigned char); void DelayMs(int);

30


//---------------------------------- // LCD command Function //---------------------------------- void GLCD_Comd(unsigned char cmnd) { DATA = cmnd; //send command to port RS = 0; //make it RS to Low RW = 0; //make it RW to low lcd_e = 1; //enable high DelayMs(10); lcd_e = 0; //enable low } //---------------------------------- // LCD Data Function //---------------------------------- void GLCD_Data(unsigned char dat) { DATA = dat; //send command to port RS = 1; //make it RS to high RW = 0; //make it RW to low lcd_e = 1; //enable high DelayMs(10); lcd_e = 0; //enable low } //---------------------------------- // LCD Delay Function //---------------------------------- void DelayMs(int k) { unsigned int a; for(a=0;a<=k;a++); } //---------------------------------- // GLCD Initialization Function //---------------------------------- void GLCD_Init() { unsigned char Comd[5]={0xc0,0xb8,0x40,0x3f};//LCD Command list Select_page(1); //send commands to page1 for(i=0;i<4;i++) GLCD_Comd(Comd[i]); Select_page(0); //send commands to page0 for(i=0;i<4;i++) GLCD_Comd(Comd[i]); }

31


//---------------------------------- // Page Selection //---------------------------------- void Select_page(unsigned char Page) { if(Page) { CS1=0; //Page 0 LCD IC1 CS2=1; } else { CS1=1; //Page 1 LCD IC2 CS2=0; } } //------------------------------------- // Display Picture for page0 & page1 //------------------------------------- void GLCD_PutPicture(const unsigned char *ip) //Cha nge here for method 1,2 & 3 { int Page=0,i=0; int Column=0; for (Page = 0; Page < 8; Page++) { Select_page(1); //Display part of image to Page 1 GLCD_Comd(0xb8 | Page); GLCD_Comd(0x40); for (Column = 0; Column < 128; Column++) { if (Column == 64) { Select_page(0); //Display part of image to Page0 GLCD_Comd(0xb8 |); GLCD_Comd(0x40); } GLCD_Data(*ip++); } } } //------------------------ // Main Program //----------------------- void main(void) { GLCD_Init(); //Initialize GLCD DelayMs(10); GLCD_PutPicture(carsun_bmp); //Display Image while(1); //wait forever }

32


6.5 - RS-232 Communication

• RS-232 communication enables point-to-point data transfer. It is commonly used in

data acquisition applications, for the transfer of data between the microcontroller and

a PC.

• The voltage levels of a microcontroller and PC are not directly compatible with those

of RS-232, a level transition buffer such as MAX232 be used.

CANH

C15 10uF

TX0_OUT

M_TXD0

M_RXD0

M_TXD1

M_RXD1

RX0_IN

VCCP1

COM1

594837261

U10

MAX232/DIP

GN

D15

VC

C16

R1IN13

R2IN8

T2IN10 T1IN11

C1+1

C1-3

C2+4

C2-5

V+2

V-6

R1OUT12

R2OUT9

T1OUT14

T2OUT7 TX1_OUT

RX1_IN

TX0_OUT

RX0_IN

RX1_IN

TX1_OUT

C11 100n

P2

COM2

594837261

C12

10uF

C14

10uF

C13 10uF

CANL

�: Note : Make switch positions below this UART0(P1).

P3.0P3.1

P1.2P1.3

M_TXD1M_RXD1

M_RXD0M_TXD0

SW4

SW DIP-10

33


/*------------------------------------------------- -------------------------*/ /* Example : Program to send data serially through serial port */ /*------------------------------------------------- -------------------------*/ /* Filename :send.c Date:29/05/06 */ /* */ /* Company :PANTECH SOLUTIONS */ /*------------------------------------------------- -------------------------*/ /* Note : output can view by system's hyper termina l window */ /* set baudrate to 9600 */ /*------------------------------------------------- -------------------------*/ #include <REG51.H> /*special functio n register declarations */ #include <stdio.h> /*prototype decla rations for I/O functions*/ void serial_init(void); //------------------------------------------------- //Setup the serial port for 9600 baud at 11.0592MHz . //------------------------------------------------- void serial_init(void) { SCON = 0x50; /* SCON: mode 1, 8-bit UAR T, enable rcvr */ TMOD |= 0x20; /* TMOD: timer 1, mod e 2, 8-bit reload */ TH1 = 0xFD; /* TH1: reload value for 9600 baud,11.0592MHz*/ TR1 = 1; /* TR1: timer 1 run */ TI = 1; /* TI: set TI to se nd first char of UART */ } //Main Program Starts Here //-------------------------- void main(void) { serial_init(); while (1) printf ("Hello! World\n"); /* Print "Hello World" */ }

Output

34


/*------------------------------------------------- -------------------------*/ /* Example : Program to send data serially through serial port 0 & 1 */ /*------------------------------------------------- -------------------------*/ /* Filename :UART0_1.c Date:25/01/08 */ /* */ /* Company :PANTECH SOLUTIONS */ /*------------------------------------------------- -------------------------*/ /* Connection - Only Dallas MCU89c4xx */ /* ---------------------------------- */ /* P3.0 - RXD0 (UART-0) P1.2 - RXD1 (UART-1) */ /* P3.1 - TXD0 (UART-0) P1.3 - TXD1 (UART-1) */ /* Note : PORT0(P1) - 9600 Baudrate */ /* PORT1(P2) - 4800 Baudrate */ /*------------------------------------------------- -------------------------*/ #include <reg420.H> #include <stdio.h> code unsigned char msg1[]={"Dallas UART-0"}; code unsigned char msg2[]={"Dallas UART-1"}; void DelayMs(unsigned int); //--------------------------------- // Delay Function //--------------------------------- void DelayMs(unsigned int n) { unsigned int i,j; for(j=0;j<n;j++) for(i=0;i<1000;i++); } //------------------------------------------------- -------------------- // This function initializes serial port 0&1 to run at 9600 , 4800 // baud rate using the timer 1 auto-reload mode wit h a 11.0592MHz XTAL //------------------------------------------------- -------------------- void serial_init(void) { PCON |= 0xC0; SCON0 = 0x50; //serial-0 conn mode 1 - start, 8- data, 1 stop bit SCON1 = 0x52; //serial-1 conn mode 1 - start, 8- data, 1 stop bit TMOD |= 0x21; //Timer 1 mode 2, 8-bit auto re load mode TH1 = -6; //serial-0(9600), serial-1(4800) ba ud rate. TCON = 0x50; TI_0 = 1; //Enable Transmit bit of serial 0 TI_1 = 1; //Enable Transmit bit of serial 1 }

35


//-------------------------- //Main Program Starts Here //-------------------------- void main(void) { int i,j; serial_init(); while (1) { while(msg1[i]!='\0') //UART0(9600 baudrate) msg { SBUF0 = msg1[i++]; DelayMs(10); } DelayMs(10); while(msg2[j]!='\0') //UART1(4800 Baudrate) msg { SBUF1 = msg2[j++]; DelayMs(10); } } }

Note : Dallas MCU User can’t set 9600 baud rate for both the UART0 and UART1

PORT0(P1) - 9600 baudrate

PORT1(P2) – 4800 baudrate

Output

36


6.6 - Real Time Clock

The DS1307 Serial Real-Time Clock is a low power; full binary-coded decimal (BCD)

clock/calendar plus 56 bytes of NV SRAM. The DS1307 has a built-in power sense

circuit that detects power failures and automatically switches to the battery supply.

In Embedded module’s DS1307 of pin SDA and SCL connected to the

Microcontroller’s pin P2.1 and P2.0 respectively. Address and data are transferred

serially via a 2-wire, bi-directional bus. The clock/calendar provides seconds,

minutes, hours, day, date, month, and year information. The end of the month/ date

is automatically adjusted for months with fewer than 31 days, including corrections

for leap year. The clock operates in either the 24-hour or 12-hour format with AM/PM

indicator.

This RTC circuit is facilitated with Battery backup, when supply fails; battery voltage

goes to DS1307 RTC chip.

VCC

I2C_SCL

I2C_SDA

U17

DS1307

SQW/OUT7

SDA5

X11

X22

SCLK6

VBAT3

I2C

_RT

C8

X3

32.768KHz

BT1

3.6V Battery12

D7

1N4148

D9

1N4148

VCC

D8

1N4148

R40

1K

R434K7

R424K7

I2C_SDAP2.1P2.0 I2C_SCL

SW31

SW DIP-8

12345678

161514131211109

P2.[0..7]

Note: Before using RTC make switch settings like above mentioned.

37


/*------------------------------------------------- -------------------------*/ /* Example : Program to Display I2C RTC(DS1307) to Hyper terminal window */ /*------------------------------------------------- -------------------------*/ /* Filename :I2CRTC_Serial.c Date:29/05/06 */ /* */ /* Company :PANTECH SOLUTIONS */ /*------------------------------------------------- -------------------------*/ /* RTC(DS1307) */ /* ----------- */ /* SCL : P2.0 */ /* SDA : P2.1 */ /* Output : Port0(P1) ...Hyper terminal, 9600baud r ate */ /*------------------------------------------------- -------------------------*/ #include<reg51.h> #include<stdio.h> #include<intrins.h> //------------------- // DS1307 driver //------------------- #define ACK 1 #define NO_ACK 0 #define SLAVE 0xD0 #define WRITE 0x00 #define READ 0x01 #define ERR_ACK 0x01 unsigned char i; const unsigned char * DayStr[7] = {{"Sun"}, {"Mon"}, {"Tue"}, {"Wen"}, {"The"}, {"Fri"}, {"Sat"}}; const unsigned char * MonthStr[12] ={{"Jan"}, {"Feb"}, {"Mar"}, {"Apr"}, {"May"}, {"Jun"}, {"Jul"}, {"Aug"}, {"Sep"}, {"Oct"}, {"Nov"}, {"Dec"}};

38


sbit SCL = P2^0; // connect to SCL pin (Clock) sbit SDA = P2^1; // connect to SDA pin (Data) unsigned char RTC_ARR[7]; // Buffer for second,mi nute,.....,year unsigned char p; //--------------------------------------- // Initialize serial port //--------------------------------------- void InitSerial(void) { SCON = 0x52; // setup serial port control TMOD = 0x20; // hardware (9600 BAUD @11.0559 2MHZ) TH1 = 0xFD; // TH1 TR1 = 1; // Timer 1 on } //---------------------------------- // Convert BCD 1 byte to HEX 1 byte //---------------------------------- unsigned char BCD2HEX(unsigned int bcd) { unsigned char temp; temp=((bcd>>8)*100)|((bcd>>4)*10)|(bcd&0x0f); return temp; } //------------------------------- // start I2C //------------------------------- void Start(void) { SDA = 1; SCL = 1; _nop_();_nop_(); SDA = 0; _nop_();_nop_(); SCL = 0; _nop_();_nop_(); } //------------------------------- // stop I2C //------------------------------- void Stop(void) { SDA = 0; _nop_();_nop_(); SCL = 1; _nop_();_nop_(); SDA = 1; }

39


//------------------------------- // Write I2C //------------------------------- void WriteI2C(unsigned char Data) { for (i=0;i<8;i++) { SDA = (Data & 0x80) ? 1:0; SCL=1;SCL=0; Data<<=1; } SCL = 1; _nop_();_nop_(); SCL = 0; } //------------------------------- // Read I2C //------------------------------- unsigned char ReadI2C(bit ACK_Bit) { unsigned char Data=0; SDA = 1; for (i=0;i<8;i++) { SCL = 1; Data<<= 1; Data = (Data | SDA); SCL = 0; _nop_(); } if (ACK_Bit == 1) SDA = 0; // Send ACK else SDA = 1; // Send NO ACK _nop_();_nop_(); SCL = 1; _nop_();_nop_(); SCL = 0; return Data; }

40


//------------------------------- // Read 1 byte form I2C //------------------------------- unsigned char ReadBYTE(unsigned char Addr) { unsigned char Data; Start(); WriteI2C(0xD0); WriteI2C(Addr); Start(); WriteI2C(0xD1); Data = ReadI2C(NO_ACK); Stop(); return(Data); } //------------------------------- // Write 1 byte to I2C //------------------------------- void WriteBYTE(unsigned char Addr,unsigned char Dat a) { Start(); WriteI2C(0xD0); WriteI2C(Addr); WriteI2C(Data); Stop(); } //------------------------------- // Read RTC (all real time) //------------------------------- void ReadRTC(unsigned char * buff) { Start(); WriteI2C(0xD0); WriteI2C(0x00); Start(); WriteI2C(0xD1); *(buff+0)=ReadI2C(ACK); // Second *(buff+1)=ReadI2C(ACK); // Minute *(buff+2)=ReadI2C(ACK); // hour *(buff+3)=ReadI2C(ACK); // Day *(buff+4)=ReadI2C(ACK); // date *(buff+5)=ReadI2C(ACK); // month *(buff+6)=ReadI2C(NO_ACK); // year Stop(); }

41


//------------------------------- // Write RTC //------------------------------- void WriteRTC(unsigned char *buff) { Start(); WriteI2C(0xD0); WriteI2C(0x00); WriteI2C(*(buff+0)); WriteI2C(*(buff+1)); WriteI2C(*(buff+2)); WriteI2C(*(buff+3)); WriteI2C(*(buff+4)); WriteI2C(*(buff+5)); WriteI2C(*(buff+6)); Stop(); } //------------------------------- // Convert date (BCD) to string of Day // 1=Sanday // 2=Monday // And so on //------------------------------- char * Int2Day(unsigned char day) { return DayStr[day-1]; } //------------------------------- // Convert month (BCD) to string of Month // 0x01=January // 0x02=February // ........... // 0x12 = December // And so on //------------------------------- char * Int2Month(unsigned char month) { return MonthStr[BCD2HEX(month)-1]; } // Delay mS function //--------------------------------------- void DelayMs(unsigned int count) { // mSec Delay 11.0592 Mhz unsigned int i; // Keil v7.5a while(count) { i = 115; while(i>0) i--; count--; } }

42


// DELAY at 11.0592MHz crystal. // Calling the routine takes about 22us, and then // each count takes another 17us. //--------------------------------------------- void DelayUs(int us) { int i; for (i=0; i<us; i++); } /*************************************** // Main program /***************************************/ void main(void) { InitSerial(); // Initialize serial port // Setup time and enable oscillator //----------------------------------- ReadRTC(&RTC_ARR[0]); RTC_ARR[0] = RTC_ARR[0] & 0x7F; // enable oscillato r (bit 7=0) RTC_ARR[1] = 0x59; // minute = 59 RTC_ARR[2] = 0x23; // hour = 05 ,24-hour mode(bit 6=0) RTC_ARR[3] = 0x04; // Day = 1 or sunday RTC_ARR[4] = 0x31; // Date = 30 RTC_ARR[5] = 0x10; // month = August RTC_ARR[6] = 0x08; // year = 05 or 2008 WriteRTC(&RTC_ARR[0]); // Set RTC while(1) { ReadRTC(&RTC_ARR[0]); putchar(0x0C); // clear Hyper terminal printf("Day : %s\r\n",Int2Day(RTC_ARR[3])); printf("Time : %02bX:%02bX:%02bX\r\n",RTC_ARR[2],RT C_ARR[1],RTC_ARR[0]); printf("Data : %02bX-%s-20%02bX",RTC_ARR[4],Int2Mon th(RTC_ARR[5]),RTC_ARR[6]); DelayMs(1000); // delay about 1 second } } Output

43


6.7 – Serial EEPROM

The AT24C01A/02/04/08/16 provides 1024/2048/4096/8192/16384 bits of serial

electrically erasable and programmable read-only memory (EEPROM) organized as

128/256/512/1024/2048 words of 8 bits each. The device is optimized for use in

many industrial and commercial applications where low-power and low-voltage

operation are essential. The AT24C01A/02/04/08/16 is available in space-saving 8-

pin PDIP.

Features of AT24Cxx:

• Internally Organized 128 x 8 (1K), 256 x 8 (2K), 512 x 8 (4K)

• 2-wire Serial Interface

• Schmitt Trigger, Filtered Inputs for Noise Suppression

• Bi-directional Data Transfer Protocol

• 100 kHz (1.8V, 2.5V, 2.7V) and 400 kHz (5V) Compatibility

• Write Protect Pin for Hardware Data Protection

• 8-byte Page (1K, 2K), 16-byte Page (4K, 8K, 16K) Write Modes

• Partial Page Writes are Allowed

• Self-timed Write Cycle (10 ms max)

• High-reliability

– Endurance: 1 Million Write Cycles

– Data Retention: 100 Years

P2.0P2.1

SW31

SW DIP-8

12345678

161514131211109

P2.[0..7]

I2C_SCLI2C_SDA

U18

AT24CXX

A01

A12

A23

GN

D4

VC

C8

WP7SCL

6 SDA5

VCC

44


/*------------------------------------------------- -------------------------*/ /* Example : Program to write and read EEPROM data through serial port */ /*------------------------------------------------- -------------------------*/ /* Filename :I2CEEPROM_Serial.c Date:29/05/06 */ /* */ /* Company :PANTECH SOLUTIONS */ /*------------------------------------------------- -------------------------*/ /* EEPROM(AT24C04) */ /* ----------- */ /* SCL : P2.0 */ /* SDA : P2.1 */ /* Output : Port0(P1) ...Hyperterminal, 9600baud ra te */ /*------------------------------------------------- -------------------------*/ #include<reg51.h> #include<stdio.h> #include<serial.h> #include<delay.h> #include<intrins.h> #define ACK 1 #define NO_ACK 0 unsigned char i; unsigned char EData[5]; unsigned char Data; void WriteI2C(unsigned char); void Start(void); void Stop(void); void ReadBYTE(unsigned int); void WriteBYTE(unsigned int); unsigned char ReadI2C(bit); sbit SCL = P2^0; // connect to SCL pin (Clock) sbit SDA = P2^1; // connect to SDA pin (Data) //--------------------------------------- // Main program //--------------------------------------- void main(void) { InitSerial(); // Initialize serial port putchar(0x0C); // clear hyper terminal DelayMs(5); WriteBYTE(0x0000); WriteI2C('A'); WriteI2C('B'); WriteI2C('C'); WriteI2C('D'); WriteI2C('E');

45


WriteI2C('F'); Stop(); DelayMs(10); ReadBYTE(0x0000); EData[0] = ReadI2C(NO_ACK); EData[1] = ReadI2C(NO_ACK); EData[2] = ReadI2C(NO_ACK); EData[3] = ReadI2C(NO_ACK); EData[4] = ReadI2C(NO_ACK); EData[5] = ReadI2C(NO_ACK); for(i=0;i<6;i++) { printf("value = %c\n",EData[i]); // display data DelayMs(100); } while(1); } //--------------------------------------- // Initialize serial port //--------------------------------------- void InitSerial(void) { SCON = 0x52; // setup serial port control TMOD = 0x20; // hardware (9600 BAUD @11.0592M HZ) TH1 = 0xFD; // TH1 TR1 = 1; // Timer 1 on } //------------------------------- // start I2C //------------------------------- void Start(void) { SDA = 1; SCL = 1; _nop_();_nop_(); SDA = 0; _nop_();_nop_(); SCL = 0; _nop_();_nop_(); }

46


//------------------------------- // stop I2C //------------------------------- void Stop(void) { SDA = 0; _nop_();_nop_(); SCL = 1; _nop_();_nop_(); SDA = 1; } //------------------------------- // Write I2C //------------------------------- void WriteI2C(unsigned char Data) { for (i=0;i<8;i++) { SDA = (Data & 0x80) ? 1:0; SCL=1;SCL=0; Data<<=1; } SCL = 1; _nop_();_nop_(); SCL = 0; } //------------------------------- // Read I2C //------------------------------- unsigned char ReadI2C(bit ACK_Bit) { Start(); WriteI2C(0xA1); SDA = 1; for (i=0;i<8;i++) { SCL = 1; Data<<= 1; Data = (Data | SDA); SCL = 0; _nop_(); } if (ACK_Bit == 1) SDA = 0; // Send ACK else SDA = 1; // Send NO ACK

47


_nop_();_nop_(); SCL = 1; _nop_();_nop_(); SCL = 0; Stop(); return Data; } // Read 1 byte form I2C //------------------------------- void ReadBYTE(unsigned int Addr) { Start(); WriteI2C(0xA0); WriteI2C((unsigned char)(Addr>>8)&0xFF); WriteI2C((unsigned char)Addr&0xFF); } // Write 1 byte to I2C //------------------------------- void WriteBYTE(unsigned int Addr) { Start(); WriteI2C(0xA0); WriteI2C((unsigned char)(Addr>>8)&0xFF); // send a ddress high WriteI2C((unsigned char)Addr&0xFF); // send addre ss low } // Delay mS function void DelayMs(unsigned int count) { // mSec Delay 11.0592 Mhz unsigned int i; // Keil v7.5a while(count) { i = 115; while(i>0) i--; count--; } } OUTPUT

48


6.8 - Seven Segment Display

In Embedded module 4 nos. of common anode seven segment displays are used. The

segment lines of seven segments LED is being terminated at connector CN9. The digit

select lines are connected to the port pins of 8051 by using BC547. All the common

anode displays consume very small amount of current. User can use segment lines

at any port P0, P1 and P2, by default digit select lines connected to Port P3 of Pin3.4

to P3.7.

U7

7 SEG DISP

E1 D2

CA

3

C4

DP5

B6 A7

CA

8

F9

G10

U8

7 SEG DISP

E1 D2

CA

3

C4

DP5

B6 A7

CA

8

F9

G10

Q1

1

2

3

Q2

1

2

3

Q3

1

2

3

Q4

1

2

3

SEG0

VCC

SEG1

R14 1K R15 1K R16 1K R17 1K

SEG2SEG3SEG4

SEG6SEG5

SEG7

SEG0SEG1

SEG4

SEG2SEG3

SEG6SEG7

SEG5

SEG0SEG1SEG2

SEG4SEG5

SEG3

SEG6

SEG0

SEG7

SEG1

SEG3SEG2

SEG4SEG5SEG6SEG7

A

D

B

C

F

E

DP

G

R18330E

R20330E

R21330E

R22330E

R23330E

R24330E

R25330E

R26330E

SEG0

SEG1

SEG2

SEG3

SEG4

SEG5

SEG6

SEG7

P3.

4

P3.

5

P3.

6

P3.

7

SEG[0..7] SEG[0..7] SEG[0..7]

A

EC

G

D

DP

B

F

CN9

7 SEG LED

1 23 45 67 89 10

SEG[0..7]

U5

7 SEG DISP

E1 D2

CA

3

C4

DP5

B6 A7

CA

8

F9

G10

U6

7 SEG DISP

E1 D2

CA

3

C4

DP5

B6 A7

CA

8

F9

G10

• User can connect 7-seg Data lines following possible ways (Not CN5).

7 SEG CON MCU CON

CN9 CN2

CN9 CN3

CN9 CN4

49


/*------------------------------------------------- -------------------------*/

/* Example : Program to Display counts from 0-1000 in 7Segment Display */

/*------------------------------------------------- -------------------------*/

/* Filename :7Seg.c Date:29/05/06 */

/* */


/*------------------------------------------------- -------------------------*/

/* Data Line : P2 */

/* Digit1 : P3.4 */

/* Digit2 : P3.5 */

/* Digit3 : P3.6 */

/* Digit4 : P3.7 */

/*------------------------------------------------- -------------------------*/

/* Note :The 7Segment display are interfaced to th e Port2.The counting of */

/* numbers from (0-1000) are displayed in 7Segmen t display. */

/*------------------------------------------------- -------------------------*/

#include<stdio.h>

#include<reg51.h>

unsigned char SetDisplay(unsigned char);

void delay(void);

sbit eseg1000 = P3^7;

sbit eseg100 = P3^6;

sbit eseg10 = P3^5;

sbit eseg1 = P3^4;

unsigned char d0,d1,d2,d3;

unsigned char SetDisplay(unsigned char value)

{

unsigned char segment[]={0xc0 ,0xf9,0xa4,0xb0,0x99, 0x92,0x83,0xf8,0x80,0x98};

if(value<=10)

return segment[value];

else

return 0;

}

//Delay Function

//--------------

void delay()

{ int i;

for(i=0; i<500; i++)

i = i + 0;

}

50


//--------------

//Main Program

//--------------

void main(void)

{

unsigned char count = 0;

unsigned long timer = 0;

int turn = 1;

P2 = 0xff;

while(1)

{

if(turn==1) //7-Seg Display 0

{

eseg1000=0;

eseg100=0;

eseg10=0;

eseg1=1;

P2=SetDisplay(d0);

turn = 2;

delay();

}

else if(turn==2) //7-Seg Display 1

{

eseg1=0;

eseg1000=0;

eseg100=0;

eseg10=1;

P2=SetDisplay(d1);

turn = 3;

delay();

}

else if(turn==3) //7-Seg Display 2

{

eseg10=0;

eseg1=0;

eseg1000=0;

eseg100=1;

P2=SetDisplay(d2);

turn = 0;

delay();

}

51


else //7-Seg Display 3

{

eseg100=0;

eseg10=0;

eseg1=0;

eseg1000=1;

P1=SetDisplay(d3);

turn = 1;

delay();

}

buzzer = 0;

if(timer == 100){

d0++;

buzzer=1;

timer=0;

if(d0>=10){

d0=0;

d1++;

if(d1>=10){

d1=0;

d2++;

if(d2>=10){

d2=0;

d3++;

if(d3>=10){

d3=0;

}

}

}

}

}

timer++;

}

}

52


6.9 - Interrupts

Microcontroller’s two external interrupts lines are terminated at switches SW1 (INT0)

and SW2 (INT1).

SW1 INT0

INTERRUPTS

SW2 INT1

INT0

INT1

Note: While using interrupt P3.2 make high (on) to SW4 for Interrupt 0, P3.3

make(on) to SW4 for interrupt 1.

P3.0

P3.2P3.3

P3.1

P1.2P1.3

M_TXD1M_RXD1

M_RXD0M_TXD0

INT1INT0

SW4

SW DIP-10

53


6.10 - DS1820 Digital Thermometer

• The DS1820 digital thermometer is well suited to environmental temperature

measurement, having a temperature range of –55C to 125C and an accuracy of +/-

0.5C.

• It must be placed correctly in the 3-pin socket in the 8051; otherwise the DS1820

could be permanently damaged.

SW31

SW DIP-8

12345678

161514131211109

P2.2 1_WIRE

P2.[0..7]

VCC

U12 DS1820

Vdd

3

DQ

2

GN

D1

R34 4K7

Features

• Unique 1-Wire interface requires only one port pin for communication

• Multi-drop capability simplifies distributed temperature sensing applications

• Can be powered from data line. Power supply range is 3.0V to 5.5V

• Measures temperatures from -55°C to +125°C (-67°F to +257°F)

• ±0.5°C accuracy from -10°C to +85°C

• 9-bit thermometer resolution, Converts temperature in 750ms (max.)

54


/*------------------------------------------------- -------------------------*/ /* Example : DS1820 Digital Temp Sensor output dis played Serial Window */ /*------------------------------------------------- -------------------------*/ /* Filename :DS18S20.c Date:29/05/06 */ /* Company :PANTECH SOLUTIONS */ /*------------------------------------------------- -------------------------*/ /* Data : P2.2 */ /*------------------------------------------------- -------------------------*/ #include<reg52.h> #include<stdio.h> sbit DQ = P2^2; // connect with DS1820 Data pin unsigned char MyTemp[9]; void DelayUs(int); // Reset DS1820 //---------------------------------------- bit ResetDS1820(void) { bit presence; DQ = 0; //pull DQ line low DelayUs(29); // leave it low for about 490us DQ = 1; // allow line to return high DelayUs(3); // wait for presence 55 uS presence = DQ; // get presence signal DelayUs(25); // wait for end of timeslot 316 uS return(presence); // presence signal returned } // 0=presence, 1 = no part //----------------------------------------- // Read one bit from DS1820 //----------------------------------------- bit ReadBit(void) { unsigned char i=0; DQ = 0; // pull DQ low to start timeslot DQ=1; for (i=0; i<3; i++); // delay 17 us from start of timeslot return(DQ); // return value of DQ line } //----------------------------------------- // Write one bit to DS1820 //----------------------------------------- void WriteBit(bit Dbit) { unsigned char i=0;

DQ=0; DQ = Dbit ? 1:0; DelayUs(5); // delay about 39 uS DQ = 1; }

55


//----------------------------------------- // Read 1 byte from DS1820 //----------------------------------------- unsigned char ReadByte(void) { unsigned char i; unsigned char Din = 0; for (i=0;i<8;i++) { Din|=ReadBit()? 0x01<<i:Din; DelayUs(6); } return(Din); } //----------------------------------------- // Write 1 byte //----------------------------------------- void WriteByte(unsigned char Dout) { unsigned char i; for (i=0; i<8; i++) // writes byte, one bit at a time { WriteBit((bit)(Dout & 0x1)); // write bit in tem p into Dout = Dout >> 1; } DelayUs(5); } //----------------------------------------- // Read temperature //----------------------------------------- void ReadTemp(unsigned char * buff) {

unsigned char n; EA=0; // disable all interrupt ResetDS1820(); WriteByte(0xcc); // skip ROM WriteByte(0x44); // perform temperature conv ersion while (ReadByte()==0xff); // wait for conversi on complete ResetDS1820(); WriteByte(0xcc); // skip ROM WriteByte(0xbe); // read the result

for (n=0; n<9; n++) // read 9 bytes but, use on ly one byte {

buff[n]=ReadByte(); // read DS1820 } EA=1; }

56


//--------------------------------------- //Serial Port Initialization //--------------------------------------- void InitSerial(void) { SCON = 0x52; // setup serial port control TMOD = 0x20; // hardware (9600 BAUD @11.055 92MHZ) TH1 = 0xFD; // TH1 TR1 = 1; // Timer 1 on } //--------------------------------------- // Delay mS function //--------------------------------------- void DelayMs(unsigned int count) { // mSec Delay 11.0592 Mhz unsigned int i; // Keil v7.5a while(count) { i = 115; while(i>0) i--; count--; } } //------------------------------------------------- ------ // DELAY at 11.0592MHz crystal. // Calling the routine takes about 22us, and then // each count takes another 17us. test with KEIL C5 1 V7.5 // ------------------------------------------------ ----- void DelayUs(int us) { int i; for (i=0; i<us; i++); } //--------------------------------------- // Main program //--------------------------------------- void main(void) { unsigned char tp,tpd,i; InitSerial(); // Initialize serial port while(1) { ReadTemp(&MyTemp[0]); tp = MyTemp[0] >> 1; tpd = ((MyTemp[0] >> 1)&1) ? 5:0; putchar(0x0C); // clear Hyper terminal printf("%bu Temperature : %2bu.%bu\r\n",i+ +,tp,tpd); DelayMs(200); } }

57


6.11 - 4x4 Matrix keypad

Keypads arranged by matrix format, each row and column section pulled by high, all

row and column lines terminated at CN7.

R1

C1R3

C3

R4

C4

R2

C2

CN7

KEYPAD

1 23 45 67 89 10

SW6

SW7 SW8 SW9

SW10 SW11 SW12 SW13

SW14 SW15 SW16 SW17

SW26 SW27 SW28 SW29

R1

R3

R2

C2C1

R4

C3 C4

R12

10K12

3456789

J2

CON3

1 2 3

VCC GND

58


/*------------------------------------------------- -------------------------*/ /* Example : Program for 4X4 Matrix Keyboard with LCD */ /*------------------------------------------------- -------------------------*/ /* Filename :Keypad_LCD.c Date:29/05/ 06 */ /* */ /* Company :PANTECH SOLUTIONS */ /*------------------------------------------------- -------------------------*/ /* LCD Data Lines : Port P1(CN2) */ /* Keypads : Port P2(CN4) */ /* Note :Getting a key value from a 4X4 Matrix K eypad (based on the Row */ /* and Column value of corresponding Key) and displaying it in the*/ /* LCD. */ /*------------------------------------------------- ---------------------------#include <stdio.h> //Define I/O Functions #include <reg51.h> //Define 8051 Registers #define DATA P1 //Define DATA to Port1 LCD void lcd_init(void); //LCD Initialization void lcd_cmd(unsigned char); //LCD Command Functi on void lcd_display(unsigned char); //LCD Display Fun ction void Key_Scan(void); //KeyScan Function void DelayMs(int); //DelayMs Function sbit RS = P3^5; //Register Select sbit RW = P3^6; //LCD Read/Write sbit lcd_e = P3^7; //LCD Enable unsigned char R,C,ch,d=0x81; unsigned int i=0; unsigned char Key[4][4] = {'C','D','E','F', //Matri x Keypad Character '8','9','A','B', //Initialization '4','5','6','7', '0','1','2','3',}; code unsigned char msg[] = ("KEYPAD TEST PGM "); //Display the Message code unsigned char msg1[] = ("PRES ANY KEY... "); //in LCD //------------------------------- // Main Program //------------------------------- void main() { lcd_init(); DelayMs(20); lcd_cmd(0x01); lcd_e=0; lcd_cmd(0x80);

59


while(1) { Key_Scan(); lcd_e=1; DelayMs(5); ch = Key[R][C]; //Assign Key value to ch; DelayMs(5); //and Row Value of Keypad lcd_display(ch); lcd_cmd(d++); DelayMs(10); P2=0xFF; } } //------------------------------- // Key Scan Function //------------------------------- void Key_Scan(void) { unsigned int i = 0; //Scanning for Row Value P2 = 0x0F; //Initialize Port2 to 0Fh while(P2 == 0x0F); if(P2 == 0x0E) //Checking for Row0 R = 0; else if(P2 == 0x0D) //Checking for Row1 R = 1; else if(P2 == 0x0B) //Checking for Row2 R = 2; else if(P2 == 0x07) //Checking for Row3 R = 3; //Scanning for Column Value P2 = 0xF0; //Initialize Port2 to F0h while(P2 == 0xF0); if(P2 == 0xE0) //Checking for Column0 C = 0; else if(P2 == 0xD0) //Checking for Column1 C = 1; else if(P2 == 0xB0) //Checking for Column2 C = 2; else if(P2 == 0x70) //Checking for Column3 C = 3; DelayMs(20); }

60


//------------------------------- // LCD command Function //------------------------------- void lcd_cmd(unsigned char cmnd) { DATA = cmnd; RS = 0; //RS:Register Select RW = 0; //RW:Read/Write lcd_e = 1; //LCD Enable DelayMs(15); lcd_e = 0; } //------------------------------- // LCD Data Function //------------------------------- void lcd_display(unsigned char dat) { DATA = dat; RS = 1; //RS:Register Select RW = 0; //RW:Read/Write lcd_e = 1; DelayMs(15); lcd_e = 0; } //------------------------------- // LCD Initialization //------------------------------- void lcd_init(void) { unsigned char i; lcd_cmd(0x38); //2x16 Character 5x7 dot DelayMs(15); //matrix LCD,8-bit format lcd_cmd(0x0c); //Display On, cursor off DelayMs(15); lcd_cmd(0x06); //Shift Cursor to right DelayMs(15); lcd_cmd(0x01); //Clear display screen DelayMs(15); // First Line Message Display //------------------------------------ lcd_cmd(0x80); //First Line Initialization DelayMs(15); i=0; while(msg[i]!='\0') { lcd_display(msg[i]); i++; } DelayMs(20);

61


// Second Line Message Display //------------------------------------ lcd_cmd(0xc0); //Second Line Initialization DelayMs(15); i=0; while(msg1[i]!='\0') { lcd_display(msg1[i]); i++; } DelayMs(30); } //-------------------------- // DelayMs Function //-------------------------- void DelayMs(int k) { unsigned int a,b; for(a=0;a<=k;a++) for(b=0;b<1275;b++); }

62


6.12 - Motor / Driver Section

The ULN2803A is a high-voltage, high-current Darlington transistor array. The device

consists of eight npn Darlington pairs that feature high-voltage outputs with

common-cathode clamp diodes for switching inductive loads. The collector-current

rating of each Darlington pair is 500 mA. The Darlington pairs may be connected in

parallel for higher current capability.

ULN2803 is used as a driver for port I/O lines, drivers output terminated to connector

CN11, there can interface relay/stepper motor or any driving source could need more

than 50mA. Motor can connect JP8 or J6 connector.

Note : User select Internal Vcc or External through JP10 header.

J7

HEADER 2

12EXT_VCC

STM_C

U9

ULN2803A

I11

I22

I33

I44

I55

I66

I77

I88

GND9

O118

O217

O316

O415

O514

O613

O712

O811

COMM10

DR5DR3

DR7

DR4DR1 DR2

DR6DR8

CN11

MOTOR/RELAY

1 23 45 67 89 10

DR1DR2DR3DR4DR5DR6DR7DR8

STM_A

STM_B

STM_B

JP8

HEADER 6

123456

STM_A

STM_C

JP10

MOTOR/RELAY

123

STM_D

VCCULN_PWR

RL1STM_B

ULN_PWRSTM_DSTM_C

J6

HEADER 6

123456

STM_A

EXT_VCC

RL2

STM_D

ULN_PWR

ULN_PWR

63


/*------------------------------------------------- -------------------------*/ /* Example : Stepper Motor Interface */ /*------------------------------------------------- -------------------------*/ /* Filename :Stepper.c Date:29/05/06 */ /* */ /* Company :PANTECH SOLUTIONS */ /*------------------------------------------------- -------------------------*/ /* Note : To rotate the stepper motor in clockwise direction */ /*------------------------------------------------- -------------------------*/ #include <reg51.h> //Define 8051 registers #include<stdio.h> void DelayMs(unsigned int); //Delay function //---------------------------------- // Main Program //---------------------------------- void main (void) { P2 = 0; //Initialize Port2 while(1) //Loop Forever { P2 = 0x01;DelayMs(20); //Delay 20msec P2 = 0x02;DelayMs(20); P2 = 0x04;DelayMs(20); P2 = 0x08;DelayMs(20); } } //--------------------------------- // Delay Function //--------------------------------- void DelayMs(unsigned int n) { unsigned int i,j; for(j=0;j<n;j++) { for(i=0;i<1000;i++); } }

64


6.13 - Relay Section

In ADB Board two no. Of SPDT relays are used. Both the relays operate on 5V DC.

The outputs of both the terminals of the relay are taken out on the connecter to

connect the external circuitry. The relay can be connected to the Microcontroller

through any of the selected port (P0.4 & P0.5) or (P1.4 & P1.5) or (P2.4 & P2.5) by

using the FRC connecter.

JP6

RE

LAY

O/P

1

123R

1_N

OR

1_C

R1_

NC

LS1

RELAY SPDT

35

412

R1_NC

R1_NOR1_C

R45 330E

R46 330E

JP7

RE

LAY

O/P

2

123R

2_N

O

R2_

NC

R2_

C

LS2

RELAY SPDT

35

412

R2_C

RL2

R2_NO

R2_NC

RL1

RL2

D14

LED

D13

LED

VCC

RL1ULN_PWR ULN_PWR

65


/*------------------------------------------------- -------------------------*/ /* Example : Relay Example Program */ /*------------------------------------------------- -------------------------*/ /* Filename :Relay.c Date :29/05/06 */ /* */ /* Company :PANTECH SOLUTIONS */ /*------------------------------------------------- -------------------------*/ /* Note :Each Relay will on/off some intervals */ /*------------------------------------------------- -------------------------*/ #include <reg51.h> //Define 8051 registers #include<stdio.h> sbit relay1 = P2^4; sbit relay2 = P2^5; void DelayMs(unsigned int); //Delay function //---------------------------------- // Main Program //---------------------------------- void main (void) { P2 = 0; //Initialize Port2 while(1) //Loop Forever { relay1 = 1; //Relay1 - ON relay2 = 0; //Relay2 - Off DelayMs(200); //Delay 20msec relay1 = 0; //Relay1 - Off relay2 = 1; //Relay2 - ON DelayMs(200); //Delay 20msec } } //--------------------------------- // Delay Function //--------------------------------- void DelayMs(unsigned int n) { unsigned int i,j; for(j=0;j<n;j++) { for(i=0;i<1000;i++); } }

66


6.14 - SPI DAC

The Microchip Technology Inc. MCP492X are 2.7 – 5.5V, low-power, low DNL, 12-Bit

Digital-to-Analog Converters (DACs) with optional 2x buffered output and SPI

interface.

The MCP492X are DACs that provide high accuracy and low noise performance for

industrial applications where calibration or compensation of signals (such as

temperature, pressure and humidity) are required. The MCP492X are available in the

extended temperature range and PDIP, SOIC, MSOP and TSSOP packages.

Features

• 12-Bit Resolution

• ±0.2 LSB DNL (typ), ±2 LSB INL (typ)

• Single or Dual Channel

• SPI™ Interface with 20 MHz Clock Support

• Simultaneous Latching of the Dual DACs w/LDAC

• Fast Settling Time of 4.5 µs

• Selectable Unity or 2x Gain Output

• 450 kHz Multiplier Mode

• External VREF Input

• Extended Temperature Range: -40°C to +125°C

DAC_CS

DAC_SDIDAC_SCK

SW31

SW DIP-8

12345678

161514131211109

P2.5P2.6P2.7

P2.[0..7]U19

MCP4291

VDD1

/C/S2

SCK3

SDI4

VOUTA8

AVSS7VREFA6

LDAC5

J11

HEADER 2

12DAC_CS

DAC_SCKDAC_SDI

VCCC18

0.1D

C21100nF

VCC

67


/*------------------------------------------------- -------------------------*/ /* Example : SPI Based DAC */ /*------------------------------------------------- -------------------------*/ /* Filename : DAC_SPI.c Da te:25/01/08 */ /*------------------------------------------------- -------------------------*/ /* Connections [I2C/1-wire/DAC section] */ /* ----------- */ /* SW31 : P2.5 - DAC_CS */ /* P2.6 - DAC_SCK */ /* P2.7 - DAC_SDI */ /* Output : J11 - view results in oscilloscope o r multi meter */ /*------------------------------------------------- -------------------------*/ #include<reg51.h> sbit CS =P2^5; //chip select port pin P2.5 sbit SCK=P2^6; //SCK Port pin 2.6 sbit SDI=P2^7; //SDI port pin P2.7 void SPI_out(unsigned char); unsigned char x=0x80,i; //---------------------- // Main program Starts //---------------------- void main() {

unsigned int Data=0x37FF; //Assign Data Here e.g 0x 33ff, //0x37ff, 0x3fff

unsigned char data1; SCK = 0; //sck pull to low while(1) //loop forever { CS=0; //make cs to low data1=(Data>>8); //shift and send to spiout SPI_out(data1); //send high byte data1=Data; SPI_out(data1); //send low byte CS=1; //make cs to high } } // SPI Data out routine //------------------------ void SPI_out(unsigned char Data_val) { for(i=0;i<8;i++) { SDI=(Data_val & x)?1:0; SCK=1; //make sck high Data_val=Data_val<<1; SCK=0; //make sck low } }

68


6.15 - RS485

The Max485 is a differential line transceiver suitable for high speed bidirectional data

communication on multipoint bus transmission lines. It is designed for balanced data

transmission and complies with EIA Standards RS-485 and RS-422. The part contains

a differential line driver and a differential line receiver. Both the driver and the

receiver may be enabled independently.

Features

• Meets EIA RS-485 Standard

• 5 Mbps Data Rate

• Single 5 V Supply

• –7 V to +12 V Bus Common-Mode Range

• High Speed, Low Power BiCMOS

• Thermal Shutdown Protection

• Short-Circuit Protection

• Driver Propagation Delay: 10 ns

• Receiver Propagation Delay: 15 ns

• High Z Outputs with Power Off

SW30

SW DIP-8

12345678

161514131211109

P3.1P3.0

TXD_485

P3.2

RXD_485

P3.[0..7] RT_485

U13

MAX485

RO1

DI4

GN

D5

VC

C8

RE2 DE3

A6

B7

RT_485RXD_485

TXD_485

R32 56E

R33 56E

J8

HEADER 2

12

VCC

R64 4k7

R63 4k7

69


Application Schematic

U13

MAX485

RO1

DI4

GN

D5

VC

C8

RE2

DE3

A6

B7

RT_485R32 56E

R33 56E

RS485

VCC

R64 4k7

R63 4k7

8051 Board1shielded pair

RS485

RS485-RS232 Adaptor

U1

AT89S51

RST9

XTAL218

XTAL119

GN

D20

PSEN29ALE/PROG30EA/VPP31

VC

C40

P1.01

P1.12

P1.23

P1.34

P1.45

P1.56

P1.67

P1.78

P2.0/A821P2.1/A922P2.2/A1023P2.3/A1124P2.4/A1225P2.5/A1326P2.6/A1427P2.7/A1528

P3.0/RXD10

P3.1/TXD11

P3.2/INTO12

P3.3/INT113

P3.4/TO14

P3.5/T115

P3.6/WR16

P3.7/RD17

P0.0/AD039

P0.1/AD138

P0.2/AD237

P0.3/AD336

P0.4/AD435

P0.5/AD534

P0.6/AD633

P0.7/AD732

C1

0.1uFVCC

SW

1R

ST C2

10uF

R2

8K2

X1

11.0592MHz

C333PF

C433PF

VCC

TXD_485

RXD_485RXD_485TXD_485RT_485

U13

MAX485

RO1

DI4

GN

D5

VC

C8

RE2

DE3

A6

B7

RT_485R32

56E

R33 56E

VCC

R64 4k7

R63 4k7

RXD_232

TXD_232

U1

MAX232

R1IN13

R2IN8

T1IN11

T2IN10

C+1

C1-3

C2+4

C2-5

V+

2

V-6

R1OUT12

R2OUT9

T1OUT14

T2OUT7

VC

C16

GN

D15

TXD_232

RXD_232

P1

SE

RIA

L P

OR

T

594837261

VCC

C3

10uF

C4

10uF

C5

10uF

C110uF

RT_485

Exemple Code

\Examples Code\RS485\send\out\send.hex

\Examples Code\RS485\receive\out\receive.hex

70


6.16 - PS/2 Interface

User can connect PS/2 Devices like keyboard, mouse to the 8051 ADB board. PS/2’s

DATA(P2.1) and CLK(P2.0) lines connected to MCU’s Port Lines. for example

keyboard connected to the ADB board it act as a pc keyboard, pressed key code

displayed in LCD or PC’s Hyperterminal window.

P2.0

VCC

J3

11

22

33

55

66

88R28 270

R27 270

P2.1

JP11

HEADER 2X2

1 23 4

P2.

[0..

7]

71


/*------------------------------------------------- -------------------------*/ /* Example :PC Keyboard Interface */ /*------------------------------------------------- -------------------------*/ /* Filename :ps2.c Date:10/01/08 */ /* */ /* Company :PANTECH SOLUTIONS * / /*------------------------------------------------- -------------------------*/ /* Note :set HyperTerminal window @ 9600baud rate */ /*------------------------------------------------- -------------------------*/ #include<reg51.h> #include<stdio.h> sbit PS2_CLK = P2^1; //PS2 Clock sbit PS2_DATA = P2^0; //PS2 Data code unsigned char Key[]={"0F FFFFF FFFFt` as cQ1 ZSAW2 CXDE43 VFTR5 NBHGY6 MJU78 ,KIO09 ./L;P- ' [=\\"}; unsigned char KeyVal,KeyVal2,i=0; void Serial_init(); //serial initialization unsigned char Scan_Data(); //scan data void putch(unsigned char); void DelayMs(unsigned int); /***************************/ /*Main Program Starts Here /***************************/ void main() { P2=0xff; Serial_init(); //serial init DelayMs(50); while(1) { while(PS2_CLK==1); KeyVal=Scan_Data(); if(KeyVal>85 || KeyVal<20 || KeyVal==0x0e) //scan keypressed { if(KeyVal==0x0e) printf("`"); if(KeyVal==0x5d || KeyVal==0x5b) { if(KeyVal==0x5b)printf("]"); if(KeyVal==0x5d)printf("\\"); } } else putch(Key[KeyVal]); //print scanned key to seria l port DelayMs(50); P2=0xff; } }

72


//--------------------- // Scan keyboard //--------------------- unsigned char Scan_Data() { unsigned char Data=0,temp; while(PS2_CLK==0); for(i=0;i<10;i++) { while(PS2_CLK==1); temp=PS2_DATA; temp<<=i; Data|=temp; while(PS2_CLK==0); } DelayMs(50); P2=0x00; return(Data); } //----------------- // serial init //----------------- void Serial_init() { SCON = 0x52; // setup serial port control TMOD = 0x20; // hardware (9600 BAUD @11.05592 MHZ) TH1 = 0xFD; // TH1 TR1 = 1; // Timer 1 on putch(0x0c); putch('R'); } // putchar //----------------- void putch(unsigned char dat) { while(TI==0); SBUF=dat; } // Delay Routine //----------------- void DelayMs(unsigned int del) { int j; while(del>0) { del--; for(j=0;j<306;j++); } }

73


6.17 - Ethernet

The ENC28J60 is a stand-alone Ethernet controller with an industry standard Serial

Peripheral Interface (SPI™). It is designed to serve as an Ethernet network interface

for any controller equipped with SPI.

The ENC28J60 meets all of the IEEE 802.3 specifications. It incorporates a number of

packet filtering schemes to limit incoming packets. It also provides an internal DMA

module for fast data throughput and hardware assisted IP checksum calculations.

Communication with the host controller is implemented via two interrupt pins and the

SPI, with data rates of up to 10 Mb/s. Two dedicated pins are used for LED link and

network activity indication.

Ethernet Controller Features

IEEE 802.3 compatible Ethernet controller

• Integrated MAC and 10BASE-T PHY

• Receiver and collision squelch circuit

• Supports one 10BASE-T port with automatic polarity detection and correction

• Supports Full and Half-Duplex modes

• Programmable automatic retransmit on collision

• Programmable padding and CRC generation

• Programmable automatic rejection of erroneous packets

• SPI™ Interface with speeds up to 10 Mb/s

74


3.3V Unit

R47

330E

D10

LED

VCC U21 REG1117/SOT

VIN3

VOUT2

GN

D1 C25

10UFC240.1uF

+3.3V

ENC28J60 Section

C2710UF

C340.1uF

+3.3V+3.3V

TD

+

INT*_ETH

C300.1uF

+3.3V

WOL*_ETH

+3.3V

C310.1uF

MISO_ETH

C320.1uF

+3.3V

C330.1uF

+3.3V

MOSI R56 100ESCK

R58 100E

R54 1KR53 1K

CS

U23

ENC28J60

VCAP1

VS

S2

CLKOUT3

/I/N/T4

/WO/O/L5

SO6

SI7

SCK8

/C/S9

RESET10

VS

SR

X11

TPIN-12

TPIN+13

RBIAS14

VDD28

LEDA27

LEDB26

VDDOSC25

OSC224

OSC123

VS

SO

SC

22

VS

SP

LL21

VDDPLL20

VDDRX19

VS

ST

X18

TP

OU

T+

17T

PO

UT

-16

VDDTX15

R51330E

RST*

R52330E

Y1

25M

Hz

D11LED

D12LED

A1 A2

C28 22pf

TD

-

RD+

C29 22pf

RD-

CN13

8051/AVR

1 23 45 67 89 10

INT*

SCK

CS*

MISO

RST*

MOSIWOL*

75


RJ-45 connector with In-built transformer

U24

RJ45

TD+1

CT4

TD-2

RD+3

CT5

RD-6

K2

11

A2

12K

110

A1

9

GND8

A1

A2

R59 56E

R60 56E

TD+

TD-

C360.1uF

C350.1uF

L1F-BEAD

R6156E

R62 56E

RD+

RD-

+3.3V

U22

74LS245

A02

A13

A24

A35

A46

A57

A68

A79

G19 DIR1

B018

B117

B216

B315

B414

B513

B612

B711

VC

C20

GN

D10

WOL*_ETHINT*_ETH

MISO_ETH

CS

INT*

MISOWOL*

R55 100E

R57 10E

VCC

CS*

C260.1uF

VCC

J12

HEADER 3X2

246

135

76


6.18 - On-Board ADC (AT89C51CC03)

This sect ion describes the on-chip 10 bit analog- to-digital converter of the

AT89C51CC03. Eight ADC channels are available for sampling of the external sources

AN0 to AN7. An analog multiplexer allows the single ADC converter to select one from

the 8 ADC channels as ADC input voltage (ADCIN). ADCIN is converted by the 10-bit

cascaded potentiometric ADC

Features

• 8 channels with multiplexed inputs

• 10-bit cascaded potentiometric ADC

• Conversion time 16 micro-seconds (typ.)

• Zero Error (offset) ± 2 LSB max

• Positive External Reference Voltage Range (VREF) 2.4 to 3.0Volt (typ.)

• ADCIN Range 0 to 3Volt

• Integral non-linearity typical 1 LSB, max. 2 LSB

• Differential non-linearity typical 0.5 LSB, max. 1 LSB

• Conversion Complete Flag or Conversion Complete Interrupt

• Selectable ADC Clock

P1.1P1.0

U2

AT89C51CC0X

VA

RE

F2

P1.0/AN03P1.1/AN14P1.2/AN25P1.3/AN3/CEX06

VA

GN

D1

P1.4/AN4/CEX17P1.5/AN5/CEX28P1.6/AN6/CEX39P1.7/AN7/CEX410

P3.0 (RXD)12

VC

C42

P3.1 (TXD)13

P3.2 (INT0)14

P3.3 (INT1)15

P3.4 (T0)16

P3.5 (T1)17

P3.6 (WR)18

P3.7 (RD)19

XT

AL2

40

XT

AL1

41G

ND

43

(RX

D_C

AN

)P4.

121

P2.

0 (A

8)29

P2.

1 (A

9)28

P2.

2 (A

10)

27

P2.

3 (A

11)

26

P2.

4 (A

12)

25

P2.

5 (A

13)

24

P2.

6 (A

14)

23

P2.

7 (A

15)

22

PSEN38

(TX

D_C

AN

) P

4.0

20

(PROG) ALE39

EA11

(AD

7) P

0.7

37(A

D6)

P0.

636

(AD

5) P

0.5

35(A

D4)

P0.

434

(AD

3) P

0.3

33(A

D2)

P0.

232

(AD

1) P

0.1

31(A

D0)

P0.

030

RESET44

R810K

13

2

JP4

ADC1

123

JP3

ADC0

123

R710K

13

2

+3.3V

+3.3V P1.0

P1.1

77


/*------------------------------------------------- -------------------------*/ /* Example : Program to Read AD0 Value to display serial port */ /*------------------------------------------------- -------------------------*/ /* Filename :adcmain.c Date:10/01/08 */ /* */ /* Company :PANTECH SOLUTIONS */ /*------------------------------------------------- -------------------------*/ /* ADC0 : P2.0, ADC1 : P2.1 */ /* */ /* Output : Port0(P1) ...Hyperterminal, 1200baud ra te */ /*------------------------------------------------- -------------------------*/ #include <stdio.h> sfr ADCON = 0xF3; sfr ADCF = 0xF6; sfr ADCLK = 0xF2; sfr ADDH = 0xF5; sfr ADDL = 0xF4; sfr SCON = 0x98; sfr TMOD = 0x89; sfr TH1 = 0x8D; sbit TR1 = 0x88^6; sbit TI = 0x98^1; /*================================================= ========================== This function initializes the serial port 1200 baud rate at 12Mhz clock. =================================================== =========================*/ void serial_init(void) { SCON = 0x50; /* SCON: mode 1, 8-bit UART, enable rcvr */ TMOD |= 0x20; /* TMOD: timer 1, mode 2, 8-bit r eload */ TH1 = 0xfd; /* TH1: reload value for 1200 ba ud @ 12MHz */ TR1 = 1; /* TR1: timer 1 run */ TI = 1; /* TI: set TI to send first cha r of UART */ } /*================================================= ========================== This function initializes the A/D Converter on the Atmel CC01 using 10-bits. =================================================== =========================*/ void init_ADC (void) { ADCF = 0xFF; // Setup P1 as 8 ADC inputs ADCLK = 0x1F; // Set AD Clock divisor to 32 (the maximum) ADCON |= 0x20; // Enable the A/D Converter }

78


/*================================================= ========================== This function sets the A/D channel to convert and s tarts a conversion. The 10-bit value is returned. =================================================== =========================*/ unsigned read_ADC (unsigned char channel) { ADCON &= ~0x07; // Clear channel bit s ADCON |= 0x07 & channel; // Set channel to co nvert ADCON |= 0x08; // Start a Conversio n while( ADCON & 0x8 ); //Wait for conversio n to end return (((unsigned) ADDH << 2) | (ADDL & 3)); } /*================================================= ==========================*//Main Program Starts Here /*================================================= ==========================* void main(void) { unsigned char i; serial_init(); //Initialize serial port init_ADC (); //Initialize the A/D Converter /*------------------------------------------------- -- Loop thru each channel and output the converted val ue. --------------------------------------------------- -*/ printf ("\n---------------------------------------- --------\n"); printf (" AD89C51CC03 On-Chip ADC Demo AN0 and A N1 \n"); printf (" AN0 - Adjust R7 POT | AN1 - Adjust R 8 POT \n"); printf ("------------------------------------------ ------\n"); while (1) { printf ("\r ADC0.0 : %u", read_ADC (0)); //read channel 0 printf (" ADC0.1 : %u", read_ADC (1)); //r ead channel 1 } } Output

79


6.19 - CAN Microcontroller (AT89C51CC03)

The CAN Controller provides all the features required to implement the serial

communication protocol CAN as defined by BOSCH GmbH. The CAN specification as

referred to by ISO/11898 (2.0A and 2.0B) for high speed and ISO/11519-2 for low

speed. The CAN Controller is able to handle all types of frames (Data, Remote, Error

and Overload) and achieves a bit-rate of 1-Mbit/sec at 8 MHz1 Crystal frequency in

X2 mode.

CAN Transceiver

The MCP2551 is a high speed CAN fault tolerant device that serves as the interface

between a CAN protocol controller and the physical bus. The MCP2551 provides

differential transmit and receive capability for the CAN protocol controller and is fully

compatible with the ISO 11898 standard, including 24 V requirements. It will operate

at speeds of up to 1 Mb/s.

Features

• Supports 1 Mb/s operation

• Implements ISO 11898 standard physical layer requirements

• Suitable for 12 V and 24 V systems

• Externally controlled slope for reduced RFI emissions

• Detection of ground fault (permanent dominant) on TXD input

• Power-on reset and voltage brown-out protection

• An un powered node or brown-out event will not disturb the CAN bus

• Low current standby operation

• Protection against damage due to short circuit conditions.

• Protection against high voltage transients

• Automatic thermal shutdown protection

• Up to 112 nodes can be connected

• High noise immunity due to differential bus implementation

80


CAN

U14

PCA82C250

TXD1 G

ND

2

VC

C3

RXD4

RS8

CANH7

CANL6

VREF5

R30330E

R29330E

D6CRX

D5CTX

R3150E

VCC

J9

HEADER 2

12

VCC

P2

COM2

594837261

U2

AT89C51CC0X

VA

RE

F2

P1.

0/A

N0

3P

1.1/

AN

14

P1.

2/A

N2

5P

1.3/

AN

3/C

EX

06

VA

GN

D1

P1.

4/A

N4/

CE

X1

7P

1.5/

AN

5/C

EX

28

P1.

6/A

N6/

CE

X3

9P

1.7/

AN

7/C

EX

410

P3.0 (RXD)12

VC

C42

P3.1 (TXD)13

P3.2 (INT0)14

P3.3 (INT1)15

P3.4 (T0)16

P3.5 (T1)17

P3.6 (WR)18

P3.7 (RD)19

XT

AL2

40

XT

AL1

41G

ND

43

(RXD_CAN)P4.121

P2.

0 (A

8)29

P2.

1 (A

9)28

P2.

2 (A

10)

27

P2.

3 (A

11)

26

P2.

4 (A

12)

25

P2.

5 (A

13)

24

P2.

6 (A

14)

23

P2.

7 (A

15)

22

PSEN38

(TXD_CAN) P4.020(PROG) ALE

39

EA11

(AD7) P0.737(AD6) P0.636(AD5) P0.535(AD4) P0.434(AD3) P0.333(AD2) P0.232(AD1) P0.131(AD0) P0.030

RESET44

81


7. Board Layout

82


8. Easy Programming Steps - Philips/NXP Microcontrollers

Hardware Settings

SW4

SW DIP-10

M_TXD0M_RXD0P3.1

P3.0

Software Settings

1. open “Flashmagic” isp software

Step 0 : Go to “Options” Menu, then choose “Advanced Options”, Advanced

options windows appears.

Choose “Hardware Config” tab, Deselect “Use DTR to Control RST”

checkbox.

Step1 :

• Select Com Port E.g COM1 or COM2

• Set baud rate “9600”

• Select Device “89V51RD2”

Interface “None(ISP)”

P1.5

P1.6

P1.7

SW32

SW DIP-4

MC_RST

ONOFF

83


Step2 :

Check “Erase all Flash”

Step3 : Load or locate your Hex files

…JNTU_Pantech\JNTU_Lab_Examples\EX1_LED\1_LED Blink\Out\LedBlink.hex

Step4 : select options you want like above figure, verify, erase, security bit.

Step 5: press “Start” button

Press Hardware “RST” Button SW5. Now it starts, Erasing, Program &

Verifying.

84


2 - Atmel Microcontrollers

Hardware Settings

P1.5P1.7

P1.6

SW32

SW DIP-4

MC_RST

Software Settings

1. “Options” - Menu

Select Port

-LP1

Device Selection

AT89S51

Clock : 12MHz

2. “File” Menu – “Load Buffer” Load your hex file

…\Examples Code\LED Blink\Out\LEDBlink.hex

85


3. “Instructions” – “Auto Program”

In Lock Bit settings

Executions

“Instructions” Menu

“Run Target” – Your program Now executes

Note : “Options” – Menu

“Initialize” – It comes to program mode

86


3 - Dallas Microcontrollers

Hardware Settings

MC_RST

SW4

SW DIP-10

R24K7

VCC

R34K7

VCC

EA

R4330E

VCC D4LED

PSEN

M_TXD0M_RXD0P3.1

P3.0

Select Dallas mcu “DS89C450”

1. “Options” – Menu

Select com port and set baud rate to 9600

87


2. “Target” – Menu

1. Open Com1at 9600

2. Connect to Loader

We get window like this

3. “File” – Load Flash

…\Examples Code\LED Blink\Out\LEDBlink.hex

Execution Mode

Set DIPSWITCH SW4 – ‘EXE’ Mode

88


ATNEL CAN Microcontroller

Hardware Settings

SW4

SW DIP-10

R24K7

VCC

R34K7

VCC

EA

R4330E

VCC D4LED

PSEN

M_TXD0M_RXD0

P3.0P3.1

Software Settings

“Device” Menu

“Settings” – menu

“Communication” – RS232

Serial Port ‘COM ‘ & Baud rate ‘38400’

89


Press ‘Reset” key from Hardware ADB Board

Press “connect” button

‘File’ – menu

Load Hex files

\Examples Code\AT89C51CC03 Examples\UART\OUT\UART.hex

Press “RUN” Button

Execution mode

• Uncheck – ‘BLJB’ check box

• Check – ‘Reset’ check box

• Press “Start Application”

8051 ADB Board Manual

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Transcript of 8051 ADB Board Manual