Question
CAN BUS Receiving (Using by HAL_CAN_GetRxMessage command)
I can send CAN BUS TX Messages to a reader and I can see my data very well.
But I can not get (receive) data from another CAN BUS Unit. (Doesn't read data)
I do not know what is wrong with my code?
Could you please help me about it?
Thank you.
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* <h2><center>© Copyright (c) 2020 STMicroelectronics.
* All rights reserved.</center></h2>
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "can.h"
#include "gpio.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "LCD.h"
#include "string.h"
#include "stdio.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
char line1[32],line2[32];
int i=0;
uint8_t RxData[8];
uint8_t ubKeyNumber;
CAN_FilterTypeDef sFilterConfig;
CAN_TxHeaderTypeDef TxHeader;
CAN_RxHeaderTypeDef RxHeader;
uint32_t TxMailbox;
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_CAN_Init();
/* USER CODE BEGIN 2 */
lcd_init(_LCD_4BIT, _LCD_FONT_5x8, _LCD_2LINE);
lcd_print(1,1,"Receiving Text"); // 1. Satir 1. Sutun'dan itibaren yaz!
lcd_print(2,1,"test"); // 2. Satir 1. Sutun'dan itibaren yaz!
HAL_Delay(1000);
lcd_clear();
// YOU MUST SET 16th bit of MCR Register to 0 for making it work in debug mode!!! I did it manually. So if you use it don't mess with TIMING QUANTAS
hcan.Instance->MCR = 0x60;
//IMPORTANT FOR DEBUG!!!!!!!
//uint8_t Data[8] ;
TxHeader.DLC=8;
TxHeader.IDE=CAN_ID_STD;
TxHeader.RTR=CAN_RTR_DATA;
TxHeader.StdId=135;
TxHeader.ExtId=127;
TxHeader.TransmitGlobalTime = DISABLE;
/*sFilterConfig.FilterFIFOAssignment=CAN_FILTER_FIFO0; //set fifo assignment
sFilterConfig.FilterIdHigh=0x245<<5; //the ID that the filter looks for (switch this for the other microcontroller)
sFilterConfig.FilterIdLow=0;
sFilterConfig.FilterMaskIdHigh=0;
sFilterConfig.FilterMaskIdLow=0;
sFilterConfig.FilterScale=CAN_FILTERSCALE_32BIT; //set filter scale
sFilterConfig.FilterActivation=ENABLE; */
HAL_CAN_IRQHandler(&hcan);
HAL_CAN_ConfigFilter(&hcan,&sFilterConfig);
HAL_CAN_Start(&hcan);
HAL_CAN_ActivateNotification(&hcan,CAN_IT_RX_FIFO0_MSG_PENDING);
HAL_Delay(500);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
HAL_CAN_GetRxMessage(&hcan, CAN_RX_FIFO0, &RxHeader, RxData);
char RH[8];
char yaz[8];
sprintf (RH,"%d",RxHeader.StdId);
sprintf (yaz,"%d",RxData[0]);
lcd_print(1,1, RH);
lcd_print(2,1, yaz);
HAL_GPIO_TogglePin(GPIOC, GPIO_PIN_13);
HAL_Delay(500);
//}
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB busses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
tex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/