STM32H7 FDCAN Normal Mode

Overview

This code demonstrates Classical CAN communication using the FDCAN peripheral on an STM32H7 microcontroller with STM32 HAL drivers. It includes CAN message transmission, interrupt-driven message reception, standard ID filtering, and GPIO-based reception indication.

The system periodically transmits CAN frames and listens for incoming messages using RX FIFO0 callbacks. When a new CAN frame is received, a GPIO pin is toggled to provide a simple hardware-level indication of successful reception.

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Hardware Used

• STM32H723ZGT Development Board
• CAN Transceiver : TJA1057 and MCP2551

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Software Used

• STM32CubeIDE

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CAN Configuration

Pin Configuration

Transmission

• Standard Identifier: 0x11
• Data Length: 8 bytes
• Frame Type: Data Frame
• Format: Classical CAN
• Bit Rate Switch: Disabled
• Nominal Baud Rate: 500 Kbps

Reception

• RX FIFO0 interrupt enabled
• Standard ID range filter configured from 0x00 to 0xFF
• Callback function: HAL_FDCAN_RxFifo0Callback()

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Example Transmitted Data

1, 2, 3, 4, 5, 6, 7, 8

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Project Structure

STM32H7_NormalMode/
├── Core/
│   ├── Inc/
│   └── Src/
├── Drivers/
├── Debug/
├── .project
├── .cproject
└── README.md

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Applications

• Communication between BMS Master and Rear VCU

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Future Improvements

• CAN message formatting for motor controllers
• Implementing FDCAN and Bitrate switching

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Author

Krish Gupta

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