stm32f030 Timer14 的PWM问题

只看该作者 · 2020-10-22 17:10

想用PWM但是一直输出LOW
不知道是不是板子的问题但是再别的f1板子上还是可以跑相似的程序的
多谢各位大佬相助

#include "stm32f0xx_tim.h"

#include "stm32f0xx_rcc.h"

#include "stm32f0xx_gpio.h"

#include "stm32f0xx.h"

 

int main(void)

{

        GPIO_InitTypeDef port;

        TIM_TimeBaseInitTypeDef timer;

        TIM_OCInitTypeDef timerPWM;

 

        RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);

        RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM14, ENABLE);

 

        GPIO_StructInit(&port);

        port.GPIO_Mode = GPIO_Mode_AF;

        port.GPIO_Pin = GPIO_Pin_4;

        port.GPIO_Speed = GPIO_Speed_Level_3;

        GPIO_Init(GPIOA, &port);

 

        TIM_TimeBaseStructInit(&timer);

        timer.TIM_Prescaler = 480;

        timer.TIM_Period = 1000;

        timer.TIM_ClockDivision = TIM_CKD_DIV1;

        timer.TIM_CounterMode = TIM_CounterMode_Up;

        TIM_TimeBaseInit(TIM14, &timer);

 

//        TIM_SetAutoreload(TIM14, 1000);

        TIM_OC1PreloadConfig(TIM14, TIM_OCPreload_Enable);

 

        TIM_OCStructInit(&timerPWM);

        timerPWM.TIM_OCMode = TIM_OCMode_PWM1;

        timerPWM.TIM_OutputState = TIM_OutputState_Enable;

        timerPWM.TIM_Pulse = 500;

        timerPWM.TIM_OCPolarity = TIM_OCPolarity_High;

        TIM_OC1Init(TIM14, &timerPWM);

    TIM_Cmd(TIM14, ENABLE);

 

//        TIM_OC1FastConfig(TIM14, TIM_OCFast_Disable);

//        TIM_CtrlPWMOutputs(TIM14, ENABLE);

//        TIM_OC1PreloadConfig(TIM14, TIM_OCPreload_Enable);

 

    while(1)

    {

    }

}