Page Comparison

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• State machine is:

  1. Open

  2. Close ground

  3. Close hv

  4. Closed

• Must check relay state after each close and open, BPS fault if relays didn’t follow instructions

• Wait 100 ms to check relay state, wait 200 ms between closing gnd and closing hv

• prv_open(): opens gnd then hv, can do them both nearly the same time without checking state in between, but check state afterwards

• relay_control_init(): inits pins

• relay_process_event(): opens relays upon relay open event, advances state machine after checks

• Note: relay sense pins are hidden behind a GPIO expander and will have to be queried through I2C

Killswitch

• Killswitch is basically just a debounced GPIO pin

• prv_killswitch_cb(): BPS fault

• killswitch_init(): inits pins. Hidden behind gpio expander, will have to go through that driver.

Cell_sense

• prv_fault_check(): check fresh data for faults

• prv_periodic…(): periodically reads AFEs for data

• cell_sense_init(): begins periodic checks, inits SPI

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• Current sense

• exposes init(), and read()

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MCP23008

• May need addition of interrupt configuration