STM32F103C8T6单片机定时器1通道1,2,3无输出

ID:988147 · 发表于 2022-3-9 21:10

#include "PWM.h"
extern u16 zhankong;
void PWM_init(u16 a,u16 b)
{
      GPIO_InitTypeDef  GPIO_InitStruct;
      TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStruct;
      TIM_OCInitTypeDef  TIM_OCInitStructure;
//       TIM_BDTRInitTypeDef TIM_BDTRInitStructure;
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO|RCC_APB2Periph_GPIOB,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,DISABLE);
      GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP ;
      GPIO_PinRemapConfig(GPIO_PartialRemap_TIM1,ENABLE);



      GPIO_InitStruct.GPIO_Pin = GPIO_Pin_8;

      GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOA,&GPIO_InitStruct);




      TIM_TimeBaseInitStruct.TIM_Period = 0;//自动装载ARR的值
      TIM_TimeBaseInitStruct.TIM_Prescaler =300;
      TIM_TimeBaseInitStruct.TIM_ClockDivision = 0;
      TIM_TimeBaseInitStruct.TIM_CounterMode = TIM_CounterMode_Up;
      TIM_TimeBaseInitStruct.TIM_RepetitionCounter =0;


      TIM_TimeBaseInit(TIM1,&TIM_TimeBaseInitStruct);

      TIM_OCInitStructure.TIM_Pulse = a;//比较CCR的值，决定脉冲宽度，决定占空比
      TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //选择定时器模式:TIM脉冲宽度调制模式

      TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;//比较输出使能TIM_
      TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;


      //TIM_OCInitStructure.TIM_OutputState = TIM_OutputNState_Enable;

      TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //输出极性:TIM输出比较极性高

      TIM_OC1Init(TIM1, &TIM_OCInitStructure);  //根据T指定的参数初始化外设TIM3 OC2
      TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);  //使能TIM3在CCR2上的预装载寄存器




      TIM_CtrlPWMOutputs(TIM1, ENABLE);

      TIM_Cmd(TIM1,ENABLE);

}
void pwm(void)
            {TIM_SetAutoreload(TIM1, 0X3000);//设置预装载寄存器

            TIM_SetCompare1( TIM1,zhankong);//设置占空
            }

ID:988147 · 发表于 2022-3-13 11:47

#include "stm32f10x.h"

int main(void){

// RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO|RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB,ENABLE);
//RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1,ENABLE);
//
//RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,DISABLE);

RCC->APB2ENR|=1<<11;      //TIM1时钟使能
  RCC->APB2ENR|=1<<2; //使能PORTA时钟
RCC->APB2ENR|=1<<3; //使能PORTB时钟
RCC->APB2ENR|=1<<0;    //开启辅助时钟

GPIOA->CRH&=0XFFFFF000; //清除PA8,9,10配置
GPIOA->CRH|=0X00000BBB; //PA8,9,10推挽复用功能输出 B=1011

GPIOB->CRH&=0X000FFFFF; //清除PB13,14,15配置
GPIOB->CRH|=0XBBB00000; //PB13,14,15推挽复用功能输出

GPIOA->ODR|=1<<8;
GPIOA->ODR|=1<<9;GPIOA->ODR|=1<<10;
GPIOB->ODR|=1<<13;
GPIOB->ODR|=1<<14;GPIOB->ODR|=1<<15;

TIM1->CCR1=1500;
TIM1->CCR2=800;
TIM1->CCR3=1200;

TIM1->ARR=3000; //设定计数器自动重装值
TIM1->PSC=30; //预分频器不分频

TIM1->BDTR|=0xCD;    // 死区时间设定

TIM1->CCER|=1<<0;//TIM1CH1通道开关使能
TIM1->CCER|=1<<2;//TIM1CH1N 通道开关

TIM1->CCER|=1<<4;
TIM1->CCER|=1<<6;

TIM1->CCER|=1<<8;
TIM1->CCER|=1<<10;

TIM1->CCMR1|=7<<4;    //CH1 PWM2模式
TIM1->CCMR1|=1<<3;    //CH1预装载使能

TIM1->CCMR1|=7<<12;    //CH2 PWM2模式
TIM1->CCMR1|=1<<11; //CH1预装载使能

  TIM1->CCMR2|=7<<4;    //CH3 PWM2模式
TIM1->CCMR2|=1<<11; //CH3预装载使能

TIM1->CR1|=0X80;// CR1 ARPE自动重装载预装载允许位使能

TIM1->BDTR|=1<<15;  //刹车使能位置1，开启所有输出通道
TIM1->CR1|=0X01; //使能定时计数器1
}

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