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/**
******************************************************************************
* @file TIM/TIM_OnePulse/Src/main.c
* @author MCD Application Team
* @brief This sample code shows how to use TIM HAL API to generate
* a one pulse signal
******************************************************************************
* @attention
*
* Copyright (c) 2019-2021 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/** @addtogroup STM32WBxx_HAL_Examples
* @{
*/
/** @addtogroup TIM_OnePulse
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Timer handler declaration */
TIM_HandleTypeDef TimHandle;
/* Prescaler value declartion*/
uint32_t uwPrescalerValue = 0;
/* Timer One Pulse Configuration Structure declaration */
TIM_OnePulse_InitTypeDef sConfig = {0};
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void Error_Handler(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Main program.
* @param None
* @retval None
*/
int main(void)
{
/* 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
*/
HAL_Init();
/*##1 Configure the system clock to 64 MHz */
SystemClock_Config();
/* Configure LED3 */
BSP_LED_Init(LED3);
/*##2 Compute the prescaler value, to have TIM2Freq = 1000000 Hz
* TIM2CLK = SystemCoreClock
*
* Prescaler = (TIM2CLK /TIM2 counter clock) - 1
*
* The prescaler value is computed in order to have TIM2 counter clock
* set at 1000000 Hz.
*/
uwPrescalerValue = (uint32_t)((SystemCoreClock) / 1000000) - 1;
/*##-3- Configure the TIM peripheral #######################################
*
*-The external signal is connected to TIM2_CH2 pin (PA.01),
* and a rising edge on this input is used to trigger the Timer.
*
*-The One Pulse signal is output on TIM2_CH1 (PA.00).
*
* The delay value is fixed to:
* - Delay = CCR1/TIM2 counter clock
* = 16383 / 1000000 [sec]
*
* The pulse value is fixed to :
* - Pulse value = (TIM_Period - TIM_Pulse)/TIM2 counter clock
* = (65535 - 16383) / 1000000 [sec]
*
* ------------------------------------------------------------------------ */
TimHandle.Instance = TIMx;
TimHandle.Init.Period = 0xFFFF;
TimHandle.Init.Prescaler = uwPrescalerValue;
TimHandle.Init.ClockDivision = 0;
TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimHandle.Init.RepetitionCounter = 0;
TimHandle.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
if (HAL_TIM_OnePulse_Init(&TimHandle, TIM_OPMODE_SINGLE) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/*##-2- Configure the Channel 1 in One Pulse mode ##########################*/
sConfig.OCMode = TIM_OCMODE_PWM2;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.Pulse = 16383;
sConfig.ICPolarity = TIM_ICPOLARITY_RISING;
sConfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
sConfig.ICFilter = 0;
sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
if (HAL_TIM_OnePulse_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_1, TIM_CHANNEL_2) != HAL_OK)
{
/* Configuration Error */
Error_Handler();
}
/*##-4- Start the One Pulse mode #######################################
*
* * The one pulse waveform can be displayed using an oscilloscope and it looks
* like this.
*
* ____
* | |
* CH2 _________________________| |_________________________________________
*
* ___________________________
* | |
* CH1 ______________________________________| |____
* <---Delay----><------Pulse--------------->
*
*
*
*
*
*/
if (HAL_TIM_OnePulse_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
{
/* Starting Error */
Error_Handler();
}
while (1)
{
}
}
/**
* @brief This function is executed in case of error occurrence.
* @param None
* @retval None
*/
static void Error_Handler(void)
{
/* Turn LED3 on */
BSP_LED_On(LED3);
while (1)
{
}
}
/**
* @brief System Clock Configuration
* The system Clock is configured as follow :
* System Clock source = PLL (MSI)
* SYSCLK(Hz) = 64000000
* HCLK(Hz) = 64000000
* HCLK1 Prescaler = 1
* HCKL2 Prescaler = 2
* HCKLS Prescaler = 1
* APB1 Prescaler = 1
* APB2 Prescaler = 1
* MSI Frequency(Hz) = 4000000
* PLL_M = 1
* PLL_N = 32
* PLL_P = 5
* PLL_Q = 4
* PLL_R = 2
* Flash Latency(WS) = 3
*/
void SystemClock_Config(void)
{
RCC_ClkInitTypeDef RCC_ClkInitStruct ={0};
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
/* Activate PLL with HSI as source */
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
RCC_OscInitStruct.MSIState = RCC_MSI_ON;
RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;
RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
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.PLLR = RCC_PLLR_DIV2;
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV5;
RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV4;
if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
/* Initialization Error */
while(1);
}
/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2
clocks dividers */
RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2 | RCC_CLOCKTYPE_HCLK2 | RCC_CLOCKTYPE_HCLK4);
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)
{
/* Initialization Error */
while(1);
}
}
#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(char *file, uint32_t line)
{
/* 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)
{
}
}
#endif
/**
* @}
*/
/**
* @}
*/
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