mirror of
https://github.com/STMicroelectronics/STM32CubeF4.git
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354 lines
11 KiB
C
354 lines
11 KiB
C
/**
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******************************************************************************
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* @file TIM/TIM_7PWMOutput/Src/main.c
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* @author MCD Application Team
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* @brief This sample code shows how to use STM32F4xx TIM HAL API to generate
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* 7 signals in PWM.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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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_7PWMOutput
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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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/* Timer Output Compare Configuration Structure declaration */
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TIM_OC_InitTypeDef sPWMConfig;
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/* Timer Break Configuration Structure declaration */
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TIM_BreakDeadTimeConfigTypeDef sBreakConfig;
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/* Counter Period value */
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uint32_t uwPeriodValue = 0;
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/* Pulses value */
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uint32_t uwPulse1, uwPulse2, uwPulse3, uwPulse4 = 0;
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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, instruction and Data caches
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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: global MSP (MCU Support Package) initialization
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*/
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HAL_Init();
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/* 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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/* Compute the period value to have TIM1 counter clock equal to 18kHz */
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uwPeriodValue = (uint32_t) ((SystemCoreClock / 18000) - 1);
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/* Compute Pulse1 value to generate a duty cycle at 50% for channel 1 and 1N */
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uwPulse1 = (5 * (uwPeriodValue - 1)) / 10;
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/* Compute Pulse2 value to generate a duty cycle at 37.5% for channel 2 and 2N */
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uwPulse2 = (375 * (uwPeriodValue - 1)) / 1000;
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/* Compute Pulse3 value to generate a duty cycle at 25% for channel 3 and 3N */
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uwPulse3 = (25 * (uwPeriodValue - 1)) / 100;
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/* Compute Pulse4 value to generate a duty cycle at 12.5% for channel 4 */
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uwPulse4 = (125 * (uwPeriodValue- 1)) / 1000;
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/*##-1- Configure the TIM peripheral #######################################*/
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/* ---------------------------------------------------------------------------
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Generate 7 PWM signals with 4 different duty cycles (50%, 37.5%, 25% and 12.5%)
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TIM1 input clock (TIM1CLK) is set to 2 * APB2 clock (PCLK2), since APB2
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prescaler is different from 1.
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TIM1CLK = 2 * PCLK2
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PCLK1 = HCLK / 2
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=> TIM1CLK = HCLK = SystemCoreClock
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TIM1CLK is fixed to SystemCoreClock, the TIM1 Prescaler is set to have
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TIM1 counter clock = 18kHz.
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The objective is to generate 7 PWM signal at 18kHz:
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- TIM1_Period = (SystemCoreClock / 18000) - 1
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The channel 1 and channel 1N duty cycle is set to 50%
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The channel 2 and channel 2N duty cycle is set to 37.5%
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The channel 3 and channel 3N duty cycle is set to 25%
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The channel 4 duty cycle is set to 12.5%
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The Timer pulse is calculated as follows:
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- ChannelxPulse = DutyCycle * (TIM1_Period - 1) / 100
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Note:
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SystemCoreClock variable holds HCLK frequency and is defined in system_stm32f4xx.c file.
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Each time the core clock (HCLK) changes, user had to update SystemCoreClock
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variable value. Otherwise, any configuration based on this variable will be incorrect.
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This variable is updated in three ways:
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1) by calling CMSIS function SystemCoreClockUpdate()
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2) by calling HAL API function HAL_RCC_GetSysClockFreq()
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3) each time HAL_RCC_ClockConfig() is called to configure the system clock frequency
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--------------------------------------------------------------------------- */
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/* Initialize TIM peripheral as follows:
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+ Prescaler = 0
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+ Period = uwPeriodValue (to have an output frequency equal to 18kHz)
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+ ClockDivision = 0
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+ Counter direction = Up
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*/
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/* Select the Timer instance */
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TimHandle.Instance = TIM1;
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TimHandle.Init.Prescaler = 0;
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TimHandle.Init.Period = uwPeriodValue;
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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_PWM_Init(&TimHandle) != 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 PWM channels #########################################*/
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/* Common configuration for all channels */
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sPWMConfig.OCMode = TIM_OCMODE_PWM2;
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sPWMConfig.OCFastMode = TIM_OCFAST_DISABLE;
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sPWMConfig.OCPolarity = TIM_OCPOLARITY_LOW;
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sPWMConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
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sPWMConfig.OCIdleState = TIM_OCIDLESTATE_SET;
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sPWMConfig.OCNIdleState= TIM_OCNIDLESTATE_RESET;
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/* Set the pulse value for channel 1 */
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sPWMConfig.Pulse = uwPulse1;
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if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_1) != 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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/* Set the pulse value for channel 2 */
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sPWMConfig.Pulse = uwPulse2;
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if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, 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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/* Set the pulse value for channel 3 */
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sPWMConfig.Pulse = uwPulse3;
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if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_3) != 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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/* Set the pulse value for channel 4 */
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sPWMConfig.Pulse = uwPulse4;
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if(HAL_TIM_PWM_ConfigChannel(&TimHandle, &sPWMConfig, TIM_CHANNEL_4) != 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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/*##-3- Start PWM signals generation #######################################*/
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/* Start channel 1 */
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if(HAL_TIM_PWM_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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/* Start channel 1N */
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if(HAL_TIMEx_PWMN_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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/* Start channel 2 */
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if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_2) != 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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/* Start channel 2N */
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if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_2) != 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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/* Start channel 3 */
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if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_3) != 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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/* Start channel 3N */
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if(HAL_TIMEx_PWMN_Start(&TimHandle, TIM_CHANNEL_3) != 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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/* Start channel 4 */
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if(HAL_TIM_PWM_Start(&TimHandle, TIM_CHANNEL_4) != 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 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) = 25000000
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* PLL_M = 25
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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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* PLL_R = 6
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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_ON;
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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 = 25;
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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 = 6;
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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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/**
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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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#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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