原创举个例程，定时器更新中断

 2023-9-20 06:54  686 7 7 分类: 物联网文集: 学习分享

当然，我可以为你提供一个基于STM32F4系列微控制器的PWM和定时器中断的例程。注意，这只是一个简化的例子，你可能需要根据你的具体硬件和需求进行调整。

c复制代码

	#include "stm32f4xx.h"

	// 初始化TIM3
	void TIM3_PWM_Init(void)
	{
	GPIO_InitTypeDef GPIO_InitStructure;
	TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
	TIM_OCInitTypeDef TIM_OCInitStructure;

	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);

	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
	GPIO_Init(GPIOA, &GPIO_InitStructure);

	GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_TIM3);

	TIM_TimeBaseStructure.TIM_Period = 7199;
	TIM_TimeBaseStructure.TIM_Prescaler = 9;
	TIM_TimeBaseStructure.TIM_ClockDivision = 0;
	TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

	TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

	TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
	TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
	TIM_OCInitStructure.TIM_Pulse = 0;
	TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

	TIM_OC1Init(TIM3, &TIM_OCInitStructure);

	TIM_OC1PreloadConfig(TIM3, TIM_OCPreload_Enable);

	TIM_ARRPreloadConfig(TIM3, ENABLE);

	TIM_Cmd(TIM3, ENABLE);
	}

	// 定时器3中断服务程序
	void TIM3_IRQHandler(void)
	{
	if (TIM_GetITStatus(TIM3, TIM_IT_Update) != RESET) //检查TIM3更新中断发生与否
	{
	// 此处添加你的中断处理代码
	// ...

	TIM_ClearITPendingBit(TIM3, TIM_IT_Update ); //清除TIMx更新中断标志
	}
	}

	int main(void)
	{
	// 初始化TIM3和其他外设...
	// ...

	while (1)
	{
	// 主循环，可以进行其他任务处理...
	// ...
	}
	}