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tsys01/STM32/TSYS_controller/Readme.md
eddyem 3b8755fb6c add report (russian)
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Firmware for controllers of thermal sensors

Make regular scan of 8 sensors' pairs. USART speed 115200. Code for ../../kicad/stm32

Serial interface commands (ends with '\n'), small letter for only local processing:

  • 1...7 - send message to Nth controller, not broadcast (after number should be CAN command)
  • B send dummy CAN messages to broadcast address
  • c show coefficients for all thermosensors
  • D send dummy CAN messages to master (0) address
  • Ee end temperature scan
  • Ff turn sensors off
  • g get last CAN address
  • Hh switch I2C to high speed (100kHz)
  • i reinit CAN
  • Ll switch I2C to low speed (default, 10kHz)
  • P ping everyone over CAN
  • Rr reinit I2C
  • Ss start temperature scan
  • Tt start single temperature measurement
  • u check CAN bus status for errors
  • Vv very low speed
  • Z get sensors state over CAN

PINOUT

  • I2C: PB6 (SCL) & PB7 (SDA)
  • USART1: PA9 (Tx) & PA10 (Rx)
  • CAN bus: PB8 (Rx), PB9 (Tx)
  • USB bus: PA11 (DM), PA12 (DP)
  • I2C multiplexer: PB0..PB2 (0..2 address bits), PB12 (~EN)
  • sensors' power: PB3 (in, overcurrent), PA8 (out, enable power)
  • signal LEDs: PB10 (LED0), PB11 (LED1)
  • ADC inputs: PA0 (V12/4.93), PA1 (V5/2), PA3 (I12 - 1V/A), PA6 (V3.3/2)
  • controller CAN address: PA13..PA15 (0..2 bits); 0 - master, other address - slave

LEDS

  • LED0 (nearest to sensors' connectors) - heartbeat
  • LED1 (above LED0) - CAN bus OK

CAN protocol

Variable data length: from 1 to 7 bytes. First byte of every sequence is command mark (0xA5) or data mark (0x5A).

Commands:

  • CMD_PING request for PONG cmd
  • CMD_START_MEASUREMENT start single temperature measurement
  • CMD_SENSORS_STATE get sensors state
  • CMD_START_SCAN run scan mode
  • CMD_STOP_SCAN stop scan mode
  • CMD_SENSORS_OFF turn off power of sensors
  • CMD_LOWEST_SPEED lowest I2C speed
  • CMD_LOW_SPEED low I2C speed (10kHz)
  • CMD_HIGH_SPEED high I2C speed (100kHz)
  • CMD_REINIT_I2C reinit I2C with current speed

Dummy commands for test purposes:

  • CMD_DUMMY0 = 0xDA,
  • CMD_DUMMY1 = 0xAD

Data format:

  • 1 byte - Controller number
  • 2 byte - Command received
  • 3..7 bytes - data

Thermal data format:

  • 3 byte - Sensor number (10*N + M, where N is multiplexer number, M - number of sensor in pair, i.e. 0,1,10,11,20,21...70,71)
  • 4 byte - thermal data H
  • 5 byte - thermal data L