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Diffstat (limited to 'Projects/P-NUCLEO-WB55.Nucleo/Examples/TIM/TIM_InputCapture/Src/main.c')
| -rw-r--r-- | Projects/P-NUCLEO-WB55.Nucleo/Examples/TIM/TIM_InputCapture/Src/main.c | 341 |
1 files changed, 341 insertions, 0 deletions
diff --git a/Projects/P-NUCLEO-WB55.Nucleo/Examples/TIM/TIM_InputCapture/Src/main.c b/Projects/P-NUCLEO-WB55.Nucleo/Examples/TIM/TIM_InputCapture/Src/main.c new file mode 100644 index 000000000..acccaf82f --- /dev/null +++ b/Projects/P-NUCLEO-WB55.Nucleo/Examples/TIM/TIM_InputCapture/Src/main.c @@ -0,0 +1,341 @@ +/* USER CODE BEGIN Header */ +/** + ****************************************************************************** + * @file TIM/TIM_InputCapture/Src/main.c + * @author MCD Application Team + * @brief This example shows how to use the TIM peripheral to measure only + * the frequency of an external signal. + ****************************************************************************** + * @attention + * + * <h2><center>© Copyright (c) 2019 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" + +/* Private includes ----------------------------------------------------------*/ +/* USER CODE BEGIN Includes */ + +/* 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 ---------------------------------------------------------*/ +TIM_HandleTypeDef htim2; + +/* USER CODE BEGIN PV */ +/* Captured Values */ +uint32_t uwIC2Value1 = 0; +uint32_t uwIC2Value2 = 0; +uint32_t uwDiffCapture = 0; + +/* Capture index */ +uint16_t uhCaptureIndex = 0; + +/* Frequency Value */ +uint32_t uwFrequency = 0; +/* USER CODE END PV */ + +/* Private function prototypes -----------------------------------------------*/ +void SystemClock_Config(void); +static void MX_GPIO_Init(void); +static void MX_TIM2_Init(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 */ + + /* STM32WBxx HAL library initialization: + - Configure the Flash prefetch + - Systick timer is configured by default as source of time base, but user + can eventually implement his proper time base source (a general purpose + timer for example or other time source), keeping in mind that Time base + duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and + handled in milliseconds basis. + - Set NVIC Group Priority to 4 + - Low Level Initialization + */ + /* 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 */ + + /* Configure LED3 */ + BSP_LED_Init(LED3); + + /* USER CODE END SysInit */ + + /* Initialize all configured peripherals */ + MX_GPIO_Init(); + MX_TIM2_Init(); + /* USER CODE BEGIN 2 */ + + /* USER CODE END 2 */ + + /* Infinite loop */ + /* USER CODE BEGIN WHILE */ + + /* TIM2 configuration: Input Capture mode --------------------- + The external signal is connected to TIM2 CH2 pin (PA9) + The Rising edge is used as active edge, + The TIM2 CCR2 is used to compute the frequency value + ------------------------------------------------------------ */ + + /*## Start the Input Capture in interrupt mode ##########################*/ + if(HAL_TIM_IC_Start_IT(&htim2, TIM_CHANNEL_2) != HAL_OK) + { + /* Starting Error */ + Error_Handler(); + } + while (1) + { + /* USER CODE END WHILE */ + + /* USER CODE BEGIN 3 */ + + } + /* 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 RCC Oscillators according to the specified parameters + * in the RCC_OscInitTypeDef structure. + */ + RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI; + RCC_OscInitStruct.MSIState = RCC_MSI_ON; + RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT; + RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6; + RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; + RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI; + RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV1; + RCC_OscInitStruct.PLL.PLLN = 32; + RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV5; + RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2; + RCC_OscInitStruct.PLL.PLLQ = 4; + if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) + { + Error_Handler(); + } + /** Configure the SYSCLKSource, HCLK, PCLK1 and PCLK2 clocks dividers + */ + RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK4|RCC_CLOCKTYPE_HCLK2 + |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; + RCC_ClkInitStruct.AHBCLK2Divider = RCC_SYSCLK_DIV2; + RCC_ClkInitStruct.AHBCLK4Divider = RCC_SYSCLK_DIV1; + + if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_3) != HAL_OK) + { + Error_Handler(); + } + /** Initializes the peripherals clocks + */ + /* USER CODE BEGIN Smps */ + + /* USER CODE END Smps */ +} + +/** + * @brief TIM2 Initialization Function + * @param None + * @retval None + */ +static void MX_TIM2_Init(void) +{ + + /* USER CODE BEGIN TIM2_Init 0 */ + + /* USER CODE END TIM2_Init 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 = 0; + htim2.Init.CounterMode = TIM_COUNTERMODE_UP; + htim2.Init.Period = 0xFFFF; + htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1; + htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE; + 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_2) != HAL_OK) + { + Error_Handler(); + } + /* USER CODE BEGIN TIM2_Init 2 */ + + /* USER CODE END TIM2_Init 2 */ + +} + +/** + * @brief GPIO Initialization Function + * @param None + * @retval None + */ +static void MX_GPIO_Init(void) +{ + + /* GPIO Ports Clock Enable */ + __HAL_RCC_GPIOA_CLK_ENABLE(); + +} + +/* USER CODE BEGIN 4 */ +/** + * @brief Input capture callback in non blocking mode + * @param htim : htim handle + * @retval None + */ +void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim) +{ + if (htim->Channel == HAL_TIM_ACTIVE_CHANNEL_2) + { + if(uhCaptureIndex == 0) + { + /* Get the 1st Input Capture value */ + uwIC2Value1 = HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_2); + uhCaptureIndex = 1; + } + else if(uhCaptureIndex == 1) + { + /* Get the 2nd Input Capture value */ + uwIC2Value2 = HAL_TIM_ReadCapturedValue(htim, TIM_CHANNEL_2); + + /* Capture computation */ + if (uwIC2Value2 > uwIC2Value1) + { + uwDiffCapture = (uwIC2Value2 - uwIC2Value1); + } + else if (uwIC2Value2 < uwIC2Value1) + { + /* 0xFFFF is max TIM2_CCRx value */ + uwDiffCapture = ((0xFFFF - uwIC2Value1) + uwIC2Value2) + 1; + } + else + { + /* If capture values are equal, we have reached the limit of frequency + measures */ + Error_Handler(); + } + + /* Frequency computation: for this example TIMx (TIM2) is clocked by + APB1Clk */ + uwFrequency = HAL_RCC_GetPCLK1Freq() / uwDiffCapture; + uhCaptureIndex = 0; + } + } +} + +/* 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 */ + /* Turn LED3 on */ + BSP_LED_On(LED3); + while(1) + { + } + /* 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, + ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */ + /* Infinite loop */ + while (1) + { + } + + /* USER CODE END 6 */ +} +#endif /* USE_FULL_ASSERT */ + +/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |