CAN Communication b/w STM32F753Z8 and Arduino Board

[APatel1]

Hello Everyone,

I have a two arduino boards communicating with each other on a CAN Bus. Arduino is connected to CAN Bus via MCP2515 .

Both arduino are communicating correctly with each other. Here is an example of my transmitter on arduino:

/*************************************************/

#include <SPI.h>

#include <mcp2515.h>

/*******************MESSAGES DEFINITIONS*****************/

#include <SPI.h>

#include <mcp2515.h>

struct can_frame canMsg1;

struct can_frame canMsg2;

MCP2515 mcp2515(10);

void setup() {

 canMsg1.can_id = 0x0F6;

 canMsg1.can_dlc = 8;

 canMsg1.data[0] = 0x8E;

 canMsg1.data[1] = 0x87;

 canMsg1.data[2] = 0x32;

 canMsg1.data[3] = 0xFA;

 canMsg1.data[4] = 0x26;

 canMsg1.data[5] = 0x8E;

 canMsg1.data[6] = 0xBE;

 canMsg1.data[7] = 0x86;

 canMsg2.can_id = 0x036;

 canMsg2.can_dlc = 8;

 canMsg2.data[0] = 0x0E;

 canMsg2.data[1] = 0x00;

 canMsg2.data[2] = 0x00;

 canMsg2.data[3] = 0x08;

 canMsg2.data[4] = 0x01;

 canMsg2.data[5] = 0x00;

 canMsg2.data[6] = 0x00;

 canMsg2.data[7] = 0xA0;

  

 while (!Serial);

 Serial.begin(115200);

 mcp2515.reset();

 mcp2515.setBitrate(CAN_250KBPS, MCP_8MHZ);

 mcp2515.setNormalMode(); 

 Serial.println("Example: Write to CAN");

}

void loop() {

 mcp2515.sendMessage(&canMsg1);

 mcp2515.sendMessage(&canMsg2);

 Serial.println("Messages sent"); 

 delay(100);

}

/*************************/

Now I'm trying to receive data on an STM32F753Z8 with a ICTCAN33C71XXXXXXX00 transceiver module but nothing is being received in the STM32F753Z8 from the arduino side. Since the arduino's are communicating to each other.

I ahve also tried to receive the data on Arduino side fro the STM32. But I couldn't get success.

My code for STM32 is attached in a file. Any thoughts on what I'm doing wrong or what I'm missing?

I have set the NVIC interrupt on CAN2 RX1 intr.

Baudrate :250kbps

ABP1 peripheral Clock: 13.5 mHZ

[mƎALLEm]

Hello,

I review your code and seems the CAN bitrate is not set at 250kb/s but rather to non standard bitrate 843750bit/s!!

From your code:

RCC config:

  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLM = 25;
  RCC_OscInitStruct.PLL.PLLN = 432;
  RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
  RCC_OscInitStruct.PLL.PLLQ = 2;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

CAN bit time settings: 

  hcan1.Init.Prescaler = 2;
  hcan1.Init.TimeSeg1 = CAN_BS1_5TQ;
  hcan1.Init.TimeSeg2 = CAN_BS2_2TQ;

I did the simulation in the CubeMx where the APB1 = 13.5 with CAN prescaler = 2, BS1 = 5 and BS2 = 2

Its gives the following:

PS: there is no part number: STM32F753Z8

Hope that helps you as well as others ..