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• Buttons to change state

  • Drive, Reverse, and Neutral

  • Power button

  • Regen Braking button

  • Hazard Button

• three 7-segment displays with the below quantities

  • Speedometer (speed in km/h)

  • Battery Percentage Indicator (Percent remaining charge)

  • Cruise Control indicator (desired speed in km/h)

• Indicator LEDS

  • One for each of the above buttons (P/D/N/R/Haz/Reg)

  • Left turn signal

  • Right Turn Signal

  • Cruise control enabled indicator

We will also be displaying error codes on centre console 7-segs when faults occur.

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Centre Console Functionality

Module: cc_buttons

This module provides a functions to get all button values. Buttons should be read in the fast cycle. They are connected to the pca9555 gpio expander, and must be read over i2c. This read function should just send notifications to the requisite tasks.

• Power Button, hazard, regen: send notifications to main task

• R, N, D → Send notifications to Drive FSM

Module: refreshupdate_dashboard:

Static variables:

• cruise_control_state

• target_velocity

• regen_braking_state

• power_state_to_transmit

Functions (all called in medium cycle):

• dashboard_init()

• update_indicators()

  • Gets notification value from button presses, updates indicator lights and output can_messages

    • Power button:

      • Set cc_power_ctrl.power_event

        • POWER_EV_NONE if no power button pressed event

        • POWER_EV_BTN if button is pressed and brake reading == 0

        • POWER_EV_BTN_AND_BRAKE if button is pressed and brake reading != 0

    • Hazard enabled:

      • when pressed,

      toggles

      • toggle static hazard state

      • update indicator and cc_power_

      state_to_transmit value, sets toggled value in CAN message to P

      • control.hazard_enabled message based on stored value

    • Regen Brake:

      • when pressed, toggle static regen brake state

      ,

      • update indicator and

      can message based on
  update_

  • • • drive_output.regen_brake_enabled message based on stored value

    • Lights left/right

      • update left/right indicator based on steering_info.input_lights

    • Cruise Control Enabled:

      • update static cc state based on steering_info.cc_input

      • update indicator based on cc_state

      • update drive_output based on cc_state + target_velocity

• update_displays()

  • Reads values from CAN messages, uses values for 7-seg:

    • motor_info.current_speed → speed display

    • battery_info.batt_percentage → battery display

    • if (cruise control enabled) target_velocity → cruise control display

• cruise_control_monitor()

  • Checks for cruise control inputs from steering

  • Updates

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• Pedal - Constantly monitor brake state to determine whether to enter main power state

  • Must receive value within 100MS (Could be certain number of cycles with new architecture)

• MCI

  • Constantly monitor speed message - Must receive new message within 3 seconds

  • Send pre-charge and wait for complete message with a timeout

• BMS - Heartbeat Message

  • If not received in 3 seconds, or has errors in message, a BPS fault has occurred

• ACK messages from Power Distribution, MCI,

Outputs

LED Indicators - All on a I2C Expander for 8 possible outputs

• CENTRE_CONSOLE_LED_BPS

• CENTRE_CONSOLE_LED_POWER

• CENTRE_CONSOLE_LED_DRIVE

• CENTRE_CONSOLE_LED_REVERSE

• CENTRE_CONSOLE_LED_NEUTRAL

• CENTRE_CONSOLE_LED_PARKING

• CENTRE_CONSOLE_LED_HAZARDS

• CENTRE_CONSOLE_LED_SPARE,

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• Used for Cruise Control, speed, and battery percentage

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