Rearbox

This PCB integrates all rear-side vehicle electronics, handling communication, power outputs, and sensor inputs in a compact form factor.

PCB layout.

Communication Interfaces

• 2× CAN transceivers (external)
• UART, SPI, I2C (internal only)

Power Outputs

• 2× fan drivers
• 2× pump drivers
• ASSI driver
• RTDS driver
• Brake light driver

Sensor & Signal Inputs

• 12× digital safety inputs
• 2× suspension load cell sensors
• 2× suspension potentiometers
• 2× water pressure sensors
• 2× water temperature sensors
• Monocoque temperature sensors

Overview

       

Front and back view of the PCB.

Firmware

[!IMPORTANT] For the CAN library to work correctly, the auto-generated HAL driver file needs to be patched.

Make sure to restore any changes made by the generator to the firmware/Drivers/STM32G4xx_HAL_Driver/Src/stm32g4xx_hal_fdcan.c file or the receiving won't work!

Below are the changes that need to be made to the stm32g4xx_hal_fdcan.c file:

2231c2231
<     assert_param(IS_FDCAN_RX_FIFO(RxLocation));
---
>     //assert_param(IS_FDCAN_RX_FIFO(RxLocation));
2235c2235
<         if(RxLocation == FDCAN_RX_FIFO0) /* Rx element is assigned to the Rx FIFO 0 */
---
>         if(RxLocation == 0) /* Rx element is assigned to the Rx FIFO 0 */
2343c2343
<         if(RxLocation == FDCAN_RX_FIFO0) /* Rx element is assigned to the Rx FIFO 0 */
---
>         if(RxLocation == 0) /* Rx element is assigned to the Rx FIFO 0 */

License

This project is licensed under the GPLv3 License. See the LICENSE file for details.