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Add code & schematic for 48-channel I2C multiplexer

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eddyem
2018-05-20 17:34:19 +03:00
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STM32/src4multiplexer/Readme.md Normal file
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# Check temperature on 16 sensors with different addresses and show values by USART.
USART speed 115200. Code for NUCLEO-042
### Serial interface commands (ends with '\n'):
- **C** show coefficients for both thermosensors
- **D** detect seosors (reseting them)
- **H** switch I2C to high speed (100kHz)
- **L** switch I2C to low speed (default, 10kHz)
- **R** reset both sensors
- **T** get temperature
- **number** from 0 to 48 - set active multiplexer channel (PA3..PA8)
### PINOUT
- Multiplexer: PA3..PA8 (bits0..5)
- I2C: PA9 (SCL) & PA10 (SDA)
- USART2: PA2 (Tx) & PA15 (Rx)