Question

如何用STM8的TIM1输出3路PWM

Answer 1

#include "STM8S105C_S.h"

#ifndef BIT
#define BIT(n) (1<<(n))
#endif

void PWM_OC1_25_OC2_50_OC3_75(void)
{
TIM1_CR1 &= ~BIT(0); //关闭TIM1

TIM1_PSCRH = 0;
TIM1_PSCRL = 0; //不分频

TIM1_ARRH = 0;
TIM1_ARRL = 99;

TIM1_CCR1H = 0;
TIM1_CCR1L = 25; //占空比25%（25/(99+1)）
TIM1_CCMR1= 0x60; //PWM模式1
TIM1_CCER1 |= BIT(0); //使能OC1

TIM1_CCR2H = 0;
TIM1_CCR2L = 50; //占空比50%（50/(99+1)）
TIM1_CCMR2 = 0x60; //PWM模式1
TIM1_CCER1 |= BIT(4); //使能OC2

TIM1_CCR3H = 0;
TIM1_CCR3L = 75; //占空比75%（75/(99+1)）
TIM1_CCMR3 = 0x60; //PWM模式1
TIM1_CCER2 |= BIT(0); //使能OC3

TIM1_CR1 |= BIT(0); //使能TIM1
TIM1_BKR |= BIT(7); //禁止刹车
}