Many thanks for your answer.
I will go through the indicated hints, but in the meantime I post the relevant main and tim code.
This is the main.c:
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
uint32_t IC1 = 0u;
uint32_t IC2 = 0u;
uint8_t flag =0u;
char str[50];
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef* htim)
{
uint32_t d;
sprintf(str, "In the ISR callback\n");
HAL_UART_Transmit(&huart1, (uint8_t *) str, strlen(str), HAL_MAX_DELAY);
if ( htim->Instance == TIM2)
{
if(!flag)
{
IC1 = HAL_TIM_ReadCapturedValue(&htim2,TIM_CHANNEL_4);
flag = 1;
}
else
{
IC2 = HAL_TIM_ReadCapturedValue(&htim2,TIM_CHANNEL_4);
if (IC1 != 0u && IC2 != 0u)
{
flag = 0u;
d = (IC2-IC1);
sprintf(str, "IC1 = %ld, IC2 = %ld --> delta = %ld\n", IC1, IC2, d);
HAL_UART_Transmit(&huart1, (uint8_t *) str, strlen(str), HAL_MAX_DELAY);
}
IC1 = 0u;
IC2 = 0u;
}
}
}
/* 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_TIM2_Init();
MX_USART1_UART_Init();
/* USER CODE BEGIN 2 */
HAL_TIM_IC_Start_IT(&htim2,TIM_CHANNEL_4);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
sprintf(str, "In the loop\n");
HAL_UART_Transmit(&huart1, (uint8_t *) str, strlen(str), HAL_MAX_DELAY);
HAL_GPIO_WritePin(LED_green_GPIO_Port, LED_green_Pin, GPIO_PIN_RESET);
HAL_Delay(100);
HAL_GPIO_WritePin(LED_green_GPIO_Port, LED_green_Pin, GPIO_PIN_SET);
HAL_Delay(100);
}
/* USER CODE END 3 */
}
This is tim.c:
TIM_HandleTypeDef htim2;
/* TIM2 init function */
void MX_TIM2_Init(void)
{
/* USER CODE BEGIN TIM2_Init 0 */
/* USER CODE END TIM2_Init 0 */
TIM_ClockConfigTypeDef sClockSourceConfig = {0};
TIM_MasterConfigTypeDef sMasterConfig = {0};
TIM_IC_InitTypeDef sConfigIC = {0};
/* USER CODE BEGIN TIM2_Init 1 */
/* USER CODE END TIM2_Init 1 */
htim2.Instance = TIM2;
htim2.Init.Prescaler = 1;
htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
htim2.Init.Period = 4294967295;
htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE;
if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
{
Error_Handler();
}
sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
{
Error_Handler();
}
if (HAL_TIM_IC_Init(&htim2) != HAL_OK)
{
Error_Handler();
}
sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
{
Error_Handler();
}
sConfigIC.ICPolarity = TIM_INPUTCHANNELPOLARITY_RISING;
sConfigIC.ICSelection = TIM_ICSELECTION_DIRECTTI;
sConfigIC.ICPrescaler = TIM_ICPSC_DIV1;
sConfigIC.ICFilter = 0;
if (HAL_TIM_IC_ConfigChannel(&htim2, &sConfigIC, TIM_CHANNEL_4) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN TIM2_Init 2 */
/* USER CODE END TIM2_Init 2 */
}
Thanks again,
Marco
