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stm32使用通用定时器生成pwm

news 2025/7/11 0:22:21

Driver_TIM5.c
通用定时器的通道1和2可以做时钟源

#include "Driver_TIM5.h"void Driver_TIM5_Init(void)
{/* 1.  开启时钟*//* 1.1 定时器5的时钟 */RCC->APB1ENR |= RCC_APB1ENR_TIM5EN;/* 1.2 GPIO的时钟 PA */RCC->APB2ENR |= RCC_APB2ENR_IOPAEN;/* 2. 设置GPIO的复用推挽输出 PA1 CNF=10 MODE=11*/GPIOA->CRL |= (GPIO_CRL_CNF1_1 | GPIO_CRL_MODE1);GPIOA->CRL &= ~GPIO_CRL_CNF1_0;/* 3. 定时器配置 *//* 3.1 预分频器的配置 */TIM5->PSC = 720 - 1;/* 3.2 自动重装载寄存器的配置 */TIM5->ARR = 100 - 1;/* 3.3 计数器的计数方向 0=向上 1=向下*/TIM5->CR1 &= ~TIM_CR1_DIR;/* 3.4 配置通道2的捕获比较寄存器 */TIM5->CCR2 = 50;/* 3.5 把通道2配置为输出  CCMR1_CC2S=00 */TIM5->CCMR1 &= ~TIM_CCMR1_CC2S;/* 3.6 配置通道的输出比较模式 CCMR1_OC2M=110 */TIM5->CCMR1 |= TIM_CCMR1_OC2M_2;TIM5->CCMR1 |= TIM_CCMR1_OC2M_1;TIM5->CCMR1 &= ~TIM_CCMR1_OC2M_0;/* 3.7 使能通道2  CCER_CC2E=1 */TIM5->CCER |= TIM_CCER_CC2E;/* 3.8 设置通道的极性 0=高电平有效  1=低电平有效 */TIM5->CCER &= ~TIM_CCER_CC2P;//TIM2->DIER |= TIM_DIER_UIE; // 使能更新中断//NVIC_EnableIRQ(TIM2_IRQn); // 使能NVIC中的TIM2中断
}/*void TIM2_IRQHandler(void) {if (TIM2->SR & TIM_SR_UIF) { // 检查更新中断标志位TIM2->SR &= ~TIM_SR_UIF; // 清除更新中断标志位// 在这里处理更新事件，例如刷新LED状态GPIOA->ODR ^= GPIO_ODR_OD5; // 切换LED状态}
}*/void Driver_TIM5_Start(void)
{/* 使能计数器 */TIM5->CR1 |= TIM_CR1_CEN;
}void Driver_TIM5_Stop(void)
{/* 失能计数器 */TIM5->CR1 &= ~TIM_CR1_CEN;
}void Driver_TIM5_SetDutyCycle(uint8_t dutyCycle)
{TIM5->CCR2 = dutyCycle;
}

Driver_TIM5.h

#ifndef __DRIVER_TIM5_H
#define __DRIVER_TIM5_H
#include "stm32f10x.h"void Driver_TIM5_Init(void);void Driver_TIM5_Start(void);void Driver_TIM5_Stop(void);void Driver_TIM5_SetDutyCycle(uint8_t dutyCycle);#endif