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302 lines
10 KiB
C
302 lines
10 KiB
C
/**
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******************************************************************************
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* @file TIM/TIM_OnePulse/Src/main.c
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* @author MCD Application Team
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* @brief This sample code shows how to use TIM HAL API to generate
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* a one pulse signal
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/** @addtogroup STM32F4xx_HAL_Examples
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* @{
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*/
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/** @addtogroup TIM_OnePulse
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* @{
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*/
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/* Private typedef -----------------------------------------------------------*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Timer handler declaration */
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TIM_HandleTypeDef TimHandle;
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/* Prescaler value declartion*/
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uint32_t uwPrescalerValue = 0;
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/* Timer One Pulse Configuration Structure declaration */
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TIM_OnePulse_InitTypeDef sConfig;
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/* Private function prototypes -----------------------------------------------*/
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static void SystemClock_Config(void);
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static void Error_Handler(void);
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/* Private functions ---------------------------------------------------------*/
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/**
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* @brief Main program.
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* @param None
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* @retval None
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*/
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int main(void)
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{
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/* STM32F4xx HAL library initialization:
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- Configure the Flash prefetch
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- Systick timer is configured by default as source of time base, but user
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can eventually implement his proper time base source (a general purpose
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timer for example or other time source), keeping in mind that Time base
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duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
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handled in milliseconds basis.
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- Set NVIC Group Priority to 4
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- Low Level Initialization
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*/
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HAL_Init();
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/*##1 Configure the system clock to 180 MHz */
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SystemClock_Config();
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/* Configure LED3 */
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BSP_LED_Init(LED3);
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/*##2 Compute the prescaler value, to have TIM3Freq = 18000000 Hz
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* TIM3CLK = (SystemCoreClock/2)
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*
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* Prescaler = (TIM3CLK /TIM3 counter clock) - 1
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*
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* The prescaler value is computed in order to have TIM5 counter clock
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* set at 18000000 Hz.
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*/
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uwPrescalerValue = (uint32_t)(((SystemCoreClock/2)) / 18000000) - 1;
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/*##-3- Configure the TIM peripheral #######################################
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*
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*-The external signal is connected to TIM5_CH2 pin (PA.01),
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* and a rising edge on this input is used to trigger the Timer.
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*
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*-The One Pulse signal is output on TIM5_CH1 (PA.00).
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*
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* The delay value is fixed to:
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* - Delay = CCR1/TIM5 counter clock
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* = 16383 / 18000000 [sec]
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*
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* The pulse value is fixed to :
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* - Pulse value = (TIM_Period - TIM_Pulse)/TIM5 counter clock
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* = (65535 - 16383) / 18000000 [sec]
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*
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* ------------------------------------------------------------------------ */
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TimHandle.Instance = TIMx;
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TimHandle.Init.Period = 0xFFFF;
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TimHandle.Init.Prescaler = uwPrescalerValue;
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TimHandle.Init.ClockDivision = 0;
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TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
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TimHandle.Init.RepetitionCounter = 0;
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TimHandle.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
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if (HAL_TIM_OnePulse_Init(&TimHandle, TIM_OPMODE_SINGLE) != HAL_OK)
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{
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/* Initialization Error */
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Error_Handler();
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}
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/*##-2- Configure the Channel 1 in One Pulse mode ##########################*/
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sConfig.OCMode = TIM_OCMODE_PWM2;
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sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
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sConfig.Pulse = 16383;
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sConfig.ICPolarity = TIM_ICPOLARITY_RISING;
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sConfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
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sConfig.ICFilter = 0;
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sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
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sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
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sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
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if (HAL_TIM_OnePulse_ConfigChannel(&TimHandle, &sConfig, TIM_CHANNEL_1, TIM_CHANNEL_2) != HAL_OK)
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{
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/* Configuration Error */
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Error_Handler();
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}
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/*##-4- Start the One Pulse mode #######################################
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*
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* * The one pulse waveform can be displayed using an oscilloscope and it looks
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* like this.
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*
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* ____
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* | |
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* CH2 _________________________| |_________________________________________
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*
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* ___________________________
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* | |
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* CH1 ______________________________________| |____
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* <---Delay----><------Pulse--------------->
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*
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*
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*
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*
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*
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*/
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if (HAL_TIM_OnePulse_Start(&TimHandle, TIM_CHANNEL_1) != HAL_OK)
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{
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/* Starting Error */
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Error_Handler();
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}
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while (1)
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{
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}
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}
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/**
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* @brief This function is executed in case of error occurrence.
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* @param None
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* @retval None
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*/
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static void Error_Handler(void)
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{
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/* Turn LED3 on */
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BSP_LED_On(LED3);
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while (1)
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{
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}
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}
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/**
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* @brief System Clock Configuration
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* The system Clock is configured as follow :
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* System Clock source = PLL (HSE)
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* SYSCLK(Hz) = 180000000
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* HCLK(Hz) = 180000000
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* AHB Prescaler = 1
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* APB1 Prescaler = 4
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* APB2 Prescaler = 2
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* HSE Frequency(Hz) = 8000000
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* PLL_M = 8
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* PLL_N = 360
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* PLL_P = 2
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* PLL_Q = 7
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* VDD(V) = 3.3
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* Main regulator output voltage = Scale1 mode
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* Flash Latency(WS) = 5
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* @param None
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* @retval None
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*/
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static void SystemClock_Config(void)
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{
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RCC_ClkInitTypeDef RCC_ClkInitStruct;
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RCC_OscInitTypeDef RCC_OscInitStruct;
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HAL_StatusTypeDef ret = HAL_OK;
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/* Enable Power Control clock */
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__HAL_RCC_PWR_CLK_ENABLE();
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/* The voltage scaling allows optimizing the power consumption when the device is
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clocked below the maximum system frequency, to update the voltage scaling value
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regarding system frequency refer to product datasheet. */
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__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
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/* Enable HSE Oscillator and activate PLL with HSE as source */
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RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS;
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RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
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RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
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RCC_OscInitStruct.PLL.PLLM = 8;
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RCC_OscInitStruct.PLL.PLLN = 360;
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RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
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RCC_OscInitStruct.PLL.PLLQ = 7;
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RCC_OscInitStruct.PLL.PLLR = 2;
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ret = HAL_RCC_OscConfig(&RCC_OscInitStruct);
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if(ret != HAL_OK)
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{
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while(1) { ; }
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}
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/* Activate the OverDrive to reach the 180 MHz Frequency */
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ret = HAL_PWREx_EnableOverDrive();
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if(ret != HAL_OK)
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{
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while(1) { ; }
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}
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/* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
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RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
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RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
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RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
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RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
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RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
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ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5);
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if(ret != HAL_OK)
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{
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while(1) { ; }
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}
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file: pointer to the source file name
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* @param line: assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t *file, uint32_t line)
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{
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/* User can add his own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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/* Infinite loop */
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while (1)
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{
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}
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}
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#endif
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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