Posted on November 02, 2016 at 17:28
Hello,
I'm trying to initialize CAN interface using two NUCLEO 64 boards. At first i only want to send and receive any message from one board to the other one.
While im pushing user button (PC13), the
HAL_CAN_Transmit function is called and LED (PA5) on the other board should blink.
I debugged it and the variable
xis incrementing well, but the LED's aren't blinking. I'm not sure if problem is no receiving, no transmitting, or both of them. I used STM32CubeMX to generate the configuration code and i'm working on STM32 AC6.
Code from
main.c file:
#include ''main.h''
#include ''stm32f1xx_hal.h''
/* USER CODE BEGIN Includes */
#include ''stm32f1xx_it.h''
/* USER CODE END Includes */
/* Private variables ---------------------------------------------------------*/
CAN_HandleTypeDef hcan;
/* USER CODE BEGIN PV */
/* Private variables ---------------------------------------------------------*/
uint8_t x=0;
CAN_FilterConfTypeDef sFilterConfig;
CanTxMsgTypeDef TxMsg;
CanRxMsgTypeDef RxMsg;
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
void Error_Handler(void);
static void MX_GPIO_Init(void);
static void MX_CAN_Init(void);
/* USER CODE BEGIN PFP */
/* Private function prototypes -----------------------------------------------*/
/* USER CODE END PFP */
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
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();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_CAN_Init();
/* USER CODE BEGIN 2 */
hcan.pTxMsg = &TxMsg;
hcan.pRxMsg = &RxMsg;
//Tx config
hcan.pTxMsg->StdId = 0x244;
hcan.pTxMsg->IDE = CAN_ID_STD;
hcan.pTxMsg->RTR = CAN_RTR_DATA;
hcan.pTxMsg->DLC = 1;
//filter configs
sFilterConfig.FilterNumber = 0;
sFilterConfig.FilterMode = CAN_FILTERMODE_IDLIST;
sFilterConfig.FilterScale = CAN_FILTERSCALE_32BIT;
sFilterConfig.FilterIdHigh =0;
sFilterConfig.FilterIdLow = 0;
sFilterConfig.FilterMaskIdHigh = 0;
sFilterConfig.FilterMaskIdLow = 0;
sFilterConfig.FilterFIFOAssignment = 0;
sFilterConfig.FilterActivation = ENABLE;
HAL_CAN_ConfigFilter(&hcan,&sFilterConfig);
HAL_CAN_Receive_IT(&hcan, CAN_FIFO0);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/** System Clock Configuration
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
/**Initializes the CPU, AHB and APB busses clocks
*/
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_DIV2;
RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL2;
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_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
{
Error_Handler();
}
/**Configure the Systick interrupt time
*/
HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
/**Configure the Systick
*/
HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
/* SysTick_IRQn interrupt configuration */
HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
}
/* CAN init function */
static void MX_CAN_Init(void)
{
hcan.Instance = CAN1;
hcan.Init.Prescaler = 16;
hcan.Init.Mode = CAN_MODE_NORMAL;
hcan.Init.SJW = CAN_SJW_1TQ;
hcan.Init.BS1 = CAN_BS1_3TQ;
hcan.Init.BS2 = CAN_BS2_5TQ;
hcan.Init.TTCM = DISABLE;
hcan.Init.ABOM = DISABLE;
hcan.Init.AWUM = DISABLE;
hcan.Init.NART = DISABLE;
hcan.Init.RFLM = DISABLE;
hcan.Init.TXFP = DISABLE;
HAL_NVIC_SetPriority(CAN1_RX1_IRQn,0,0);
HAL_NVIC_GetActive(CAN1_RX1_IRQn);
if (HAL_CAN_Init(&hcan) != HAL_OK)
{
Error_Handler();
}
}
/** Configure pins as
* Analog
* Input
* Output
* EVENT_OUT
* EXTI
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
/*Configure GPIO pin : PC13 */
GPIO_InitStruct.Pin = GPIO_PIN_13;
GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
/*Configure GPIO pin : LED_G_Pin */
GPIO_InitStruct.Pin = LED_G_Pin;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(LED_G_GPIO_Port, &GPIO_InitStruct);
/*Configure GPIO pin Output Level */
HAL_GPIO_WritePin(LED_G_GPIO_Port, LED_G_Pin, GPIO_PIN_RESET);
/* EXTI interrupt init*/
HAL_NVIC_SetPriority(EXTI15_10_IRQn, 1, 0);
HAL_NVIC_EnableIRQ(EXTI15_10_IRQn);
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @param None
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler */
/* User can add his own implementation to report the HAL error return state */
while(1)
{
}
/* USER CODE END Error_Handler */
}
#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
/**
* @}
*/
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
And part of code with
EXTIand
RX1interrupt from ''stm32f1xx_it.c'' file:
void CAN1_RX1_IRQHandler(void)
{
/* USER CODE BEGIN CAN1_RX1_IRQn 0 */
/* USER CODE END CAN1_RX1_IRQn 0 */
HAL_CAN_IRQHandler(&hcan);
/* USER CODE BEGIN CAN1_RX1_IRQn 1 */
HAL_CAN_Receive_IT(&hcan,CAN_FIFO0);
GPIOA->ODR = hcan.pRxMsg->Data[0]<<
5
;
/* USER CODE END CAN1_RX1_IRQn 1 */
}
/**
* @brief This function handles EXTI line[15:10] interrupts.
*/
void EXTI15_10_IRQHandler(void)
{
/* USER CODE BEGIN EXTI15_10_IRQn 0 */
HAL_Delay(50);
if (HAL_GPIO_ReadPin(GPIOC,GPIO_PIN_13)==GPIO_PIN_SET)
{
x++;
hcan.pTxMsg->Data[0]=x;
HAL_CAN_Transmit(&hcan,1);
}
/* USER CODE END EXTI15_10_IRQn 0 */
HAL_GPIO_EXTI_IRQHandler(GPIO_PIN_13);
/* USER CODE BEGIN EXTI15_10_IRQn 1 */
/* USER CODE END EXTI15_10_IRQn 1 */
}
I connected the Tx output from one board to Rx of another, with 1N4148 diode. Could someone tell me where the problem is?
Regards.
#can #stm32f103 #nucleo
