mimi版STM32开发板输出两路PWM，怎么能确认设置的引脚与PWM通道对应的对应关系！！！

路漫漫其修远兮 · 发表于 2018-11-29 10:52:49

mini版STM32输出两路PWM，引脚设置为：PA9----TIM1_CH2

A8-----TIM1_CH1,在哪里设置PA9与TIM1_CH2,PA8与TIM1_CH1的对应关系，我按照范例写的，具体程序如下：
PWM.C如下：
#include "pwm.h"
#include "led.h"

void TIM1_PWM_Init(u16 arr,u16 psc)
{
GPIO_InitTypeDef  GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO,ENABLE);

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);

      GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_Init(GPIOA,&GPIO_InitStructure);

TIM_TimeBaseStructure.TIM_Period=arr;
TIM_TimeBaseStructure.TIM_Prescaler=psc;
TIM_TimeBaseStructure.TIM_ClockDivision=0;
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);

TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High;
TIM_OC1Init(TIM1,&TIM_OCInitStructure);

TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High;
TIM_OC2Init(TIM1,&TIM_OCInitStructure);

TIM_OC1PreloadConfig(TIM1,TIM_OCPreload_Enable);
TIM_OC2PreloadConfig(TIM1,TIM_OCPreload_Enable);
TIM_Cmd(TIM1,ENABLE);
}

main函数：
#include "led.h"
#include "delay.h"
#include "sys.h"
#include "pwm.h"

int main(void)
{
TIM1_PWM_Init(899,0);
TIM_SetCompare1(TIM1,100);
TIM_SetCompare2(TIM1,100);
}