CAN Bus Communication Between STM32F407G and STM32F446RE Boards

This project demonstrates CAN bus communication between two STM32 microcontroller boards, using a CAN basic transceiver to enable reliable data exchange. The STM32F407G Discovery board reads analog values from a potentiometer, transmits the data via CAN, and the STM32F446RE board monitors the received data to activate an LED based on a threshold.

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Overview

The project highlights the practical use of the Controller Area Network (CAN) protocol for real-time data exchange between microcontrollers. It involves:

1. Reading analog values from a potentiometer on the STM32F407G Discovery board.
2. Transmitting these values via CAN to the STM32F446RE board every 100 ms.
3. Monitoring received data on the STM32F446RE board and activating an LED if a threshold is exceeded.

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Repository Structure

The repository contains two separate folders, each representing the project for one of the STM32 boards. These folders can be directly opened and modified in STM32CubeIDE:

• CAN_Sender: Contains the project for the STM32F407G Discovery Board, which reads the potentiometer values and transmits them over CAN.
• CAN_Receiver: Contains the project for the STM32F446RE Nucleo Board, which receives the CAN messages and controls the LED based on the received values.

Each folder includes:

• CubeIDE project files (.project, .cproject, etc.)
• Source code (Src/, Inc/)
• STM32CubeMX configuration files (.ioc)

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Features

• CAN Communication: Configured CAN peripherals on both boards using STM32CubeMX for robust communication.
• Analog Input Monitoring: Reads potentiometer values with an 8-bit resolution from the STM32F407G board.
• Threshold-Based LED Control: Activates an LED on the STM32F446RE board when the received value surpasses a predefined threshold.
• Periodic Updates: Transmits data every 100 ms, ensuring consistent communication.

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Hardware Requirements

• STM32F407G Discovery Board
• STM32F446RE Nucleo Board
• CAN Transceiver Modules (e.g., MCP2551 or SN65HVD230)
• Potentiometer
• LED and Resistor
• Breadboard and Jumper Wires

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Software Requirements

• STM32CubeMX
• STM32CubeIDE

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Implementation Details

1. STM32F407G Discovery Board (Transmitter):

• Configured the ADC to read analog values from a potentiometer with 8-bit resolution.
• Set up the CAN peripheral to transmit messages every 100 ms.
• CAN message structure:
  • ID: Fixed identifier for this board.
  • Data: Single byte representing the potentiometer value.

2. STM32F446RE Nucleo Board (Receiver):

• Configured the CAN peripheral to receive messages and process data using interrupts.
• Monitors the received potentiometer value:
  • If the value exceeds a predefined threshold, activates an LED.
  • Otherwise, keeps the LED off.

3. CAN Peripheral Configuration:

• Baud Rate: 500 kbps.
• Filters: Configured to accept messages from the transmitter's identifier.
• Interrupts: Used for efficient message reception and handling.

4. Communication Setup:

• Connected CAN transceivers between the boards:
  • CAN High (CANH) and CAN Low (CANL) lines.
• Ensured proper termination resistors (120 Ω) at both ends of the CAN bus.

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Usage

1. Clone the Repository:

   git https://github.com/WassimHedfi/CAN_Protocol_STM32f446re_V_STM32f407G.git
   cd CAN_Protocol_STM32f446re_V_STM32f407G