STM32的定时器模块输出两路PWM波,输出口分别是PA2,PA3

您可以使用STM32的定时器模块来实现输出两路PWM波。以下是一个基本的示例代码，用于配置定时器模块并设置输出口为PA2和PA3：

#include "stm32f4xx.h"

void Timer_PWM_Init(void)
{
    GPIO_InitTypeDef GPIO_InitStruct;
    TIM_TimeBaseInitTypeDef TIM_BaseStruct;
    TIM_OCInitTypeDef TIM_OCInitStruct;

    // 使能外设时钟
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);

    // 配置GPIO为复用功能，用于定时器输出
    GPIO_InitStruct.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3;
    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_100MHz;
    GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP ;
    GPIO_Init(GPIOA, &GPIO_InitStruct);

    // 将GPIO引脚映射到定时器功能
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_TIM2);
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_TIM2);

    // 配置定时器基本参数
    TIM_BaseStruct.TIM_Prescaler = 83;  // 设置预分频系数为84，即84MHz / (83+1) = 1MHz
    TIM_BaseStruct.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_BaseStruct.TIM_Period = 999;   // 设置计数器自动重装值为1000，即PWM周期为1ms
    TIM_BaseStruct.TIM_ClockDivision = 0;
    TIM_BaseStruct.TIM_RepetitionCounter = 0;
    TIM_TimeBaseInit(TIM2, &TIM_BaseStruct);

    // 配置定时器为PWM模式
    TIM_OCInitStruct.TIM_OCMode = TIM_OCMode_PWM1;
    TIM_OCInitStruct.TIM_OutputState = TIM_OutputState_Enable;
    TIM_OCInitStruct.TIM_OutputNState = TIM_OutputNState_Disable;
    TIM_OCInitStruct.TIM_Pulse = 500;  // 设置占空比为50%，即500 / 1000 = 50%
    TIM_OCInitStruct.TIM_OCPolarity = TIM_OCPolarity_High;
    TIM_OCInitStruct.TIM_OCNPolarity = TIM_OCNPolarity_Low;
    TIM_OCInitStruct.TIM_OCIdleState = TIM_OCIdleState_Reset;
    TIM_OCInitStruct.TIM_OCNIdleState = TIM_OCNIdleState_Reset;

    // 配置TIM2通道2和通道3为PWM输出
    TIM_OC2Init(TIM2, &TIM_OCInitStruct);
    TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable);
    TIM_OC3Init(TIM2, &TIM_OCInitStruct);
    TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Enable);

    // 使能定时器
    TIM_Cmd(TIM2, ENABLE);
}

请注意，此示例代码使用了STM32F4系列的TIM2定时器和GPIOA的引脚2和3作为PWM输出。您可以根据自己的硬件配置进行相应的修改。