久久久久久久999_99精品久久精品一区二区爱城_成人欧美一区二区三区在线播放_国产精品日本一区二区不卡视频_国产午夜视频_欧美精品在线观看免费

<li id="yiksi"></li><button id="yiksi"></button>

標題: stmf103的輸出互補PWM波 [打印本頁]

作者: wangpeiyuan 時間: 2018-7-21 20:20
標題: stmf103的輸出互補PWM波
//TIM1_CH1 PWM輸出初始化
//arr：自動重裝值
//psc：時鐘預(yù)分頻數(shù)
void TIM1_PWM_Init(u16 arr,u16 psc)
{
RCC->APB2ENR|=1<<11; //TIM1時鐘使能
RCC->APB2ENR|=1<<2;    //使能PORTA時鐘
RCC->APB2ENR|=1<<3;    //使能PORTB時鐘
RCC->APB2ENR|=1<<0;    //開啟復(fù)用時鐘

GPIOA->CRH&=0XFFFF0000; //PA8,9,10,11清除之前的設(shè)置
GPIOA->CRH|=0X0000BBBB; //PA8,9,10,11復(fù)用功能輸出

GPIOB->CRH&=0X000FFFFF;  //PB13,14,15清除之前的設(shè)置
GPIOB->CRH|=0XBBB00000;  //PB13,14,15復(fù)用功能輸出

GPIOB->ODR|=1<<13;    //PB13 輸出上拉，低電平有效
GPIOB->ODR|=1<<14;    //PB14
GPIOB->ODR|=1<<15;    //PB15
GPIOA->ODR|=1<<8;       //PA8
GPIOA->ODR|=1<<9;       //PA9
GPIOA->ODR|=1<<10;    //PA10

TIM1->ARR=arr;          //設(shè)定計數(shù)器自動重裝值    ①1
TIM1->PSC=psc;          //預(yù)分頻器設(shè)置          ②2

TIM1->CCER|=1<<0;    //TIM1CH1 輸出使能,高電平有效    ③3
TIM1->CCER|=1<<4;    //TIM1CH2 輸出使能
TIM1->CCER|=1<<8;    //TIM1CH3 輸出使能
TIM1->CCER|=1<<12;    //TIM1CH4 輸出使能
TIM1->CCER|=1<<2;    //TIM1CH1N 互補輸出使能
TIM1->CCER|=1<<6;    //TIM1CH2N 互補輸出使能
TIM1->CCER|=1<<10;    //TIM1CH3N 互補輸出使能

TIM1->CCMR1|=7<<4;    //CH1 PWM2模式          ④4
TIM1->CCMR1|=1<<3;    //CH1預(yù)裝載使能

TIM1->CCMR1|=7<<12; //CH2 PWM2模式
TIM1->CCMR1|=1<<11; //CH2預(yù)裝載使能

TIM1->CCMR2|=7<<4;    //CH3 PWM2模式
TIM1->CCMR2|=1<<3;    //CH3預(yù)裝載使能

TIM1->CCMR2|=7<<12; //CH4 PWM2模式
TIM1->CCMR2|=1<<11; //CH4預(yù)裝載使能

      TIM1->BDTR|=0x14;    //死區(qū)時間設(shè)置       ⑤5
TIM1->BDTR|=1<<15;    //MOE 主輸出使能       ⑥6
TIM1->CR1 |= 0x80;    //ARPE使能,開始所有輸出通道,默認向上計數(shù) ⑦7
TIM1->CR1 |= 0x01;    //使能計數(shù)器
}

int main(void)
{
Stm32_Clock_Init(9);    //系統(tǒng)時鐘設(shè)置
delay_init(72);          //延時初始化
TIM1_PWM_Init(499,7199); // 72M/7200=10khz, 1/10khz * 500=50ms ⑧8
while(1)
{
      TIM1->CCR1=250;  //占空比：50%  低電平時長25ms ⑨9
      TIM1->CCR2=125;  //占空比：75%  低電平時長12.5ms
      TIM1->CCR3=50;    //占空比：90% 低電平時長5ms
      TIM1->CCR4=25;    //占空比：95% 低電平時長2.5ms
}
}

歡迎光臨 (http://www.zg4o1577.cn/bbs/)

<rt id="yqiaa"></rt>