Power Selection Board: Firmware

Owned by Jarvis Weng
Last updated: May 23, 2020
1 min read

Main Functionalities

  • Check the status of AUX Battery

    • Voltage

    • Temperature

  • Check the status of DCDC

Requirements:

  • needs to communicate with the:

    • centre console

  • DCDC sends a message

    • Confirm ack status

    • I acknowledge it and turn on

    • Confirm DCDC status

  • when receive can message, there’s a pointer, and then set that point to the ACK message

 

Modules:

  • aux_dcdc_monitor_init

    • It periodically checks aux voltage and temp, and broadcasts it over CAN

    • CAN_TRANSMIT_AUX_BAT_DATA(u16 temp, u16 volt, u16 status )

      • First bit of status is aux ov

      • Second bit is aux uv 

      • Third bit is aux ot 

      • Fourth bit is aux ut

      • Fifth bit is dcdc (is on main if set)

    • It also responds to CAN_TRANSMIT_POWER_ON_MAIN_SEQUENCE

      • Do a check and then set the ack_reply

      • EE_POWER_MAIN_SEQUENCE_CONFIRM_DCDC

        • Ack with status ok if DCDC has switched to the main battery

        • Ack with status invalid if DCDC has not switched

      • EE_POWER_MAIN_SEQUENCE_CONFIRM_AUX_STATUS

        • Ack with status ok if Aux is ok (temp and volt)

        • Ack with status invalid if Aux is not ok