Rotary Encoder - People @ EECS at UC Berkeleyboser/courses/49... · 2018-03-07 · enc. enc. enc....
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B. E. Boser 1 Electronics for IoT Rotary Encoder Bernhard E. Boser University of California, Berkeley [email protected] IoT49: Encoder
Transcript of Rotary Encoder - People @ EECS at UC Berkeleyboser/courses/49... · 2018-03-07 · enc. enc. enc....
B. E. Boser 1
Electronics for IoT
Rotary Encoder
Bernhard E. BoserUniversity of California, Berkeley
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Rotary Encoder
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Optical Encoder
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IR Encoder
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Counts per Revolution (CPR)
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Example: Distance Traveled
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Encoder Readout
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Limitations
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Quadrature Encoder
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Quadrature Encoder Output
Forward Reverse
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Quadrature Encoder “Decoding”
Forward Reverse
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Quadrature Decoder Output
Forward Reverse
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Decoder Readout Hardware Support
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ESP32 uPython “Decoder”
• called “ENC”
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ENC Functions
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Summary
• Encoders monitor rotation
• Only relative angle / position
• Quadrature encoders– To distinguish forward / backward
• Decoder readouta) Interrupt handler, orb) Dedicated hardware counters
Ref: http://embeddedsystemengineering.blogspot.com/2016/07/arm-cortex-m3-stm32f103-tutorial.html
IoT49: Encoder
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