Posted on June 17, 2016 at 20:56
Hello,
i am trying to see the CAN Transmitted bits, but i am not understanding my mistake in my program. i have attached my main.c and main.h files. i am using STM32F446RE-Nucleo board using Hal library. Can someone please help me!!
Thanks in advance.
Following is main.c file:-
/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_hal.h"
/* USER CODE BEGIN Includes */
//#define __HAL_RCC_CAN1_CLK_DISABLE();
/* USER CODE END Includes */
/* Private variables ---------------------------------------------------------*/
CAN_HandleTypeDef hcan1;
/* Private variables ---------------------------------------------------------*/
CAN_HandleTypeDef CanHandle;
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_CAN1_Init(void);
int main(void)
{
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_CAN1_Init();
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
}
/* USER CODE END 3 */
}
/** System Clock Configuration
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
__HAL_RCC_CAN1_CLK_ENABLE();
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3);
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;
RCC_OscInitStruct.HSICalibrationValue = 16;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
RCC_OscInitStruct.PLL.PLLM = 8;
RCC_OscInitStruct.PLL.PLLN = 90;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
RCC_OscInitStruct.PLL.PLLQ = 2;
RCC_OscInitStruct.PLL.PLLR = 2;
HAL_RCC_OscConfig(&RCC_OscInitStruct);
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;
HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2);
HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
/* SysTick_IRQn interrupt configuration */
HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}
/**
* @brief This function is executed in case of error occurrence.
* @param None
* @retval None
*/
static void Error_Handler(void)
{
while(1)
{
}
}
/* CAN1 init function */
void MX_CAN1_Init(void)
{
CAN_FilterConfTypeDef sFilterConfig;
static CanTxMsgTypeDef TxMessage;
static CanRxMsgTypeDef RxMessage;
/*##-1- Configure the CAN peripheral #######################################*/
hcan1.Instance = CAN1;
hcan1.pTxMsg = &TxMessage;
hcan1.pRxMsg = &RxMessage;
hcan1.Instance = CAN1;
hcan1.Init.Prescaler = 5;
hcan1.Init.Mode = CAN_MODE_NORMAL;
hcan1.Init.SJW = CAN_SJW_1TQ;
hcan1.Init.BS1 = CAN_BS1_15TQ;
hcan1.Init.BS2 = CAN_BS2_2TQ;
hcan1.Init.TTCM = DISABLE;
hcan1.Init.ABOM = DISABLE;
hcan1.Init.AWUM = DISABLE;
hcan1.Init.NART = DISABLE;
hcan1.Init.RFLM = DISABLE;
hcan1.Init.TXFP = DISABLE;
//HAL_CAN_Init(&hcan1);
if(HAL_CAN_Init(&hcan1) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the CAN Filter ###########################################*/
sFilterConfig.FilterNumber = 0;
sFilterConfig.FilterMode = CAN_FILTERMODE_IDMASK;
sFilterConfig.FilterScale = CAN_FILTERSCALE_32BIT;
sFilterConfig.FilterIdHigh = 0x0000;
sFilterConfig.FilterIdLow = 0x0000;
sFilterConfig.FilterMaskIdHigh = 0x0000;
sFilterConfig.FilterMaskIdLow = 0x0000;
sFilterConfig.FilterFIFOAssignment = 0;
sFilterConfig.FilterActivation = ENABLE;
sFilterConfig.BankNumber = 14;
if(HAL_CAN_ConfigFilter(&hcan1, &sFilterConfig) != HAL_OK)
{
/* Filter configuration Error */
Error_Handler();
}
/*##-3- Configure Transmission process #####################################*/
hcan1.pTxMsg->StdId = 0x321;
hcan1.pTxMsg->ExtId = 0x01;
hcan1.pTxMsg->RTR = CAN_RTR_DATA;
hcan1.pTxMsg->IDE = CAN_ID_STD;
hcan1.pTxMsg->DLC = 2;
if(HAL_CAN_Transmit(&hcan1, 10) != HAL_OK)
{
/* Transmition Error */
HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_5);
HAL_Delay(100);
}
}
void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOH_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/*Configure GPIO pin : PA5 */
GPIO_InitStruct.Pin = GPIO_PIN_5;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* CAN1 TX GPIO pin configuration */
GPIO_InitStruct.Pin = GPIO_PIN_12;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Alternate = GPIO_AF9_CAN1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* CAN1 RX GPIO pin configuration */
GPIO_InitStruct.Pin = GPIO_PIN_11;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Alternate = GPIO_AF9_CAN1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/*Configure GPIO pin : LD2_Pin */
GPIO_InitStruct.Pin = LD2_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(LD2_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(LD2_GPIO_Port, LD2_Pin, GPIO_PIN_RESET);
/**
* @brief CAN MSP De-Initialization
* This function frees the hardware resources used in this example:
* - Disable the Peripheral's clock
* - Revert GPIO configuration to their default state
* @param hcan: CAN handle pointer
* @retval None
*/
void HAL_CAN_MspDeInit(CAN_HandleTypeDef *hcan)
{
/*##-1- Reset peripherals ##################################################*/
/*CANx_FORCE_RESET();
CANx_RELEASE_RESET();*/
#define CANx_FORCE_RESET() __HAL_RCC_CAN1_FORCE_RESET()
#define CANx_RELEASE_RESET() __HAL_RCC_CAN1_RELEASE_RESET()
/*##-2- Disable peripherals and GPIO Clocks ################################*/
/* De-initialize the CAN1 TX GPIO pin */
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_12);
/* De-initialize the CAN1 RX GPIO pin */
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_11);
}
}
#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,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif
Following is main.h file:-
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __MAIN_H
#define __MAIN_H
/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_hal.h"
#include "stm32446e_eval.h"
/* Exported constants --------------------------------------------------------*/
/* User can use this section to tailor CANx instance used and associated
resources */
/* Definition for CANx clock resources */
#define CANx CAN1
#define CANx_CLK_ENABLE() __HAL_RCC_CAN1_CLK_ENABLE()
#define CANx_GPIO_CLK_ENABLE() __HAL_RCC_GPIOA_CLK_ENABLE()
#define CANx_FORCE_RESET() __HAL_RCC_CAN1_FORCE_RESET()
#define CANx_RELEASE_RESET() __HAL_RCC_CAN1_RELEASE_RESET()
/* Exported functions ------------------------------------------------------- */
void LED_Display(uint8_t Ledstatus);
#endif /* __MAIN_H */
