关于STM32F407多个定时器同时输出PWM并中断的问题

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关于STM32F407多个定时器同时输出PWM并中断的问题

#关于STM32F407多个定时器同时输出PWM并中断的问题| 来源: 网络整理| 查看: 265

本人使用STM32F407 想要同时实现TIM3 TIM4两个定时器同时的PWM输出并且每个定时器都有中断应用目前单独调用一个定时器用示波器看都有正常的波形输出但是两个同时调用 main里边先初始化的定时器对应端口有输出第二个初始化的定时器就没有输出想问问各位这种情况是那种地方没有注意在中断函数的优先级也有区别，代码如下TIM4.H

#ifndef __TIM4_H #define __TIM4_H #include "stm32f4xx.h" #define TIM4_OCPWM_PIN GPIO_Pin_6 #define TIM4_OCPWM_GPIO_PORT GPIOB #define TIM4_OCPWM_GPIO_CLK RCC_AHB1Periph_GPIOB #define TIM4_OCPWM_PINSOURCE GPIO_PinSource6 #define TIM4_OCPWM_AF GPIO_AF_TIM4 #define TIM4_TIM TIM4 #define TIM4_TIM_CLK RCC_APB1Periph_TIM4 #define ZHUANPAN_TIM_IRQn TIM4_IRQn #define ZHUANPAN_TIM_IRQHandler TIM4_IRQnHandler #define ZHUANPAN_TIM_NVIC_PreemptionPriority 0 #define ZHUANPAN_TIM_NVIC_SubPriority 1 void TIM4_Configuration(void); #endif /* __TIM4_H */

TIM4.C

#include "./tim/bsp_general_tim.h" /** * @brief 配置TIM复用输出PWM时用到的I/O * @param 无 * @retval 无 */ static void TIM4_GPIO_Config(void) { /*定义一个GPIO_InitTypeDef类型的结构体*/ GPIO_InitTypeDef GPIO_InitStructure; /*开启相关的GPIO外设时钟*/ RCC_AHB1PeriphClockCmd (TIM4_OCPWM_GPIO_CLK, ENABLE); /* 定时器通道引脚复用 */ GPIO_PinAFConfig(TIM4_OCPWM_GPIO_PORT,TIM4_OCPWM_PINSOURCE,TIM4_OCPWM_AF); /* 定时器通道引脚配置 */ GPIO_InitStructure.GPIO_Pin = TIM4_OCPWM_PIN; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; GPIO_Init(TIM4_OCPWM_GPIO_PORT, &GPIO_InitStructure); } /* * 注意：TIM_TimeBaseInitTypeDef结构体里面有5个成员，TIM6和TIM7的寄存器里面只有 * TIM_Prescaler和TIM_Period，所以使用TIM6和TIM7的时候只需初始化这两个成员即可， * 另外三个成员是通用定时器和高级定时器才有. *----------------------------------------------------------------------------- * TIM_Prescaler 都有 * TIM_CounterMode TIMx,x[6,7]没有，其他都有（基本定时器） * TIM_Period 都有 * TIM_ClockDivision TIMx,x[6,7]没有，其他都有(基本定时器) * TIM_RepetitionCounter TIMx,x[1,8]才有(高级定时器) *----------------------------------------------------------------------------- */ static void TIM4_PWMOUTPUT_Config(void) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; // 开启TIMx_CLK,x[2,3,4,5,12,13,14] RCC_APB1PeriphClockCmd(TIM4_TIM_CLK, ENABLE); /* 累计 TIM_Period个后产生一个更新或者中断*/ //当定时器从0计数到8399，即为8400次，为一个定时周期 TIM_TimeBaseStructure.TIM_Period = 8400-1; // 通用控制定时器时钟源TIMxCLK = HCLK/2=84MHz // 设定定时器频率为=TIMxCLK/(TIM_Prescaler+1)=100KHz TIM_TimeBaseStructure.TIM_Prescaler = 840-1; // 采样时钟分频 TIM_TimeBaseStructure.TIM_ClockDivision=0; // 计数方式 TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; // 初始化定时器TIMx, x[2,3,4,5,12,13,14] TIM_TimeBaseInit(TIM4_TIM, &TIM_TimeBaseStructure); /*PWM模式配置*/ /* PWM1 Mode configuration: Channel1 */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //配置为PWM模式1 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = 2800-1; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //当定时器计数值小于CCR1_Val时为高电平 TIM_OC1Init(TIM4_TIM, &TIM_OCInitStructure); //使能通道1 /*使能通道1重载*/ TIM_OC1PreloadConfig(TIM4_TIM, TIM_OCPreload_Enable); // 使能定时器 TIM_Cmd(TIM4_TIM, ENABLE); NVIC_InitTypeDef NVIC_InitStructure; NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); NVIC_InitStructure.NVIC_IRQChannel = ZHUANPAN_TIM_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = ZHUANPAN_TIM_NVIC_PreemptionPriority; NVIC_InitStructure.NVIC_IRQChannelSubPriority = ZHUANPAN_TIM_NVIC_SubPriority; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); TIM_ITConfig(TIM4, TIM_IT_Update, ENABLE); } /** * @brief 初始化控制通用定时器 * @param 无 * @retval 无 */ void TIM4_Configuration(void) { TIM4_GPIO_Config(); TIM4_PWMOUTPUT_Config(); } void ZHUANPAN_TIM_IRQHandler(void){ //判断标志位 if(TIM_GetITStatus(TIM4,TIM_IT_Update)==SET) { //PFout(10)^=1;//对led进行闪烁操作 //清空标志位 } TIM_ClearITPendingBit(TIM4,TIM_IT_Update); }

TIM3.H

#ifndef __TIM3_H #define __TIM3_H #include "stm32f4xx.h" #define TIM3_OCPWM_PIN GPIO_Pin_6 #define TIM3_OCPWM_GPIO_PORT GPIOA #define TIM3_OCPWM_GPIO_CLK RCC_AHB1Periph_GPIOA #define TIM3_OCPWM_PINSOURCE GPIO_PinSource6 #define TIM3_OCPWM_AF GPIO_AF_TIM3 #define TIM3_TIM TIM3 #define TIM3_TIM_CLK RCC_APB1Periph_TIM3 #define SIGANG_TIM_IRQn TIM3_IRQn #define SIGANG_TIM_IRQHandler TIM3_IRQnHandler #define SIGANG_TIM_NVIC_PreemptionPriority 1 #define SIGANG_TIM_NVIC_SubPriority 1 void TIM3_Configuration(void); #endif /* __TIM3_H */

TIM3.C

#include "tim2.h" /** * @brief 配置TIM复用输出PWM时用到的I/O * @param 无 * @retval 无 */ static void TIM3_GPIO_Config(void) { /*定义一个GPIO_InitTypeDef类型的结构体*/ GPIO_InitTypeDef GPIO_InitStructure; /*开启相关的GPIO外设时钟*/ RCC_AHB1PeriphClockCmd (TIM3_OCPWM_GPIO_CLK, ENABLE); /* 定时器通道引脚复用 */ GPIO_PinAFConfig(TIM3_OCPWM_GPIO_PORT,TIM3_OCPWM_PINSOURCE,TIM3_OCPWM_AF); /* 定时器通道引脚配置 */ GPIO_InitStructure.GPIO_Pin = TIM3_OCPWM_PIN; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; GPIO_Init(TIM3_OCPWM_GPIO_PORT, &GPIO_InitStructure); } /* * 注意：TIM_TimeBaseInitTypeDef结构体里面有5个成员，TIM6和TIM7的寄存器里面只有 * TIM_Prescaler和TIM_Period，所以使用TIM6和TIM7的时候只需初始化这两个成员即可， * 另外三个成员是通用定时器和高级定时器才有. *----------------------------------------------------------------------------- * TIM_Prescaler 都有 * TIM_CounterMode TIMx,x[6,7]没有，其他都有（基本定时器） * TIM_Period 都有 * TIM_ClockDivision TIMx,x[6,7]没有，其他都有(基本定时器) * TIM_RepetitionCounter TIMx,x[1,8]才有(高级定时器) *----------------------------------------------------------------------------- */ static void TIM3_PWMOUTPUT_Config(void) { TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; TIM_OCInitTypeDef TIM_OCInitStructure; // 开启TIMx_CLK,x[2,3,4,5,12,13,14] RCC_APB1PeriphClockCmd(TIM3_TIM_CLK, ENABLE); /* 累计 TIM_Period个后产生一个更新或者中断*/ //当定时器从0计数到8399，即为8400次，为一个定时周期 TIM_TimeBaseStructure.TIM_Period = 8400-1; // 通用控制定时器时钟源TIMxCLK = HCLK/2=84MHz // 设定定时器频率为=TIMxCLK/(TIM_Prescaler+1)=100KHz TIM_TimeBaseStructure.TIM_Prescaler = 840-1; // 采样时钟分频 TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1; // 计数方式 TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; // 初始化定时器TIMx, x[2,3,4,5,12,13,14] TIM_TimeBaseInit(TIM3_TIM, &TIM_TimeBaseStructure); /*PWM模式配置*/ /* PWM1 Mode configuration: Channel1 */ TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //配置为PWM模式1 TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; TIM_OCInitStructure.TIM_Pulse = 2800-1; TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //当定时器计数值小于CCR1_Val时为高电平 TIM_OC1Init(TIM3_TIM, &TIM_OCInitStructure); //使能通道1 /*使能通道1重载*/ TIM_OC1PreloadConfig(TIM3_TIM, TIM_OCPreload_Enable); // 使能定时器 TIM_Cmd(TIM3_TIM, ENABLE); NVIC_InitTypeDef NVIC_InitStructure; NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); NVIC_InitStructure.NVIC_IRQChannel = SIGANG_TIM_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = SIGANG_TIM_NVIC_PreemptionPriority; NVIC_InitStructure.NVIC_IRQChannelSubPriority = SIGANG_TIM_NVIC_SubPriority; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); //TIM_ITConfig(TIM3_TIM, TIM_IT_Update, ENABLE); } /** * @brief 初始化控制通用定时器 * @param 无 * @retval 无 */ void TIM3_Configuration(void) { TIM3_GPIO_Config(); TIM3_PWMOUTPUT_Config(); } void SIGANG_TIM_IRQHandler(void){ //判断标志位 if(TIM_GetITStatus(TIM3,TIM_IT_Update)==SET) { //PFout(10)^=1;//对led进行闪烁操作 //清空标志位 } TIM_ClearITPendingBit(TIM3,TIM_IT_Update); }

MAIN.C

#include "stm32f4xx.h" #include "./tim/bsp_general_tim.h" #include "tim2.h" /** * @brief 主函数 * @param 无 * @retval 无 */ int main(void) { NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1); /* 初始化通用定时器PWM输出 */ TIM3_Configuration(); TIM4_Configuration(); //TIM3_Configuration(); while(1) { } }

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关于STM32F407多个定时器同时输出PWM并中断的问题

关于STM32F407多个定时器同时输出PWM并中断的问题

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