stm8s pwm输出代码 counter, include

yuchengze

#include "pwm.h" static void Delay(u16 nCount); u16 Beep_Frequency[7]={3816,3400,3029,2864,2550,2272,2023}; void PWM_Init(void) {   #if PWM_Channel==PWM_Channel1     /*TIM2 Frequency = TIM2 counter clock/(ARR + 1) */     TIM2_TimeBaseInit(TIM2_PRESCALER_16, 499);     /*TIM2 Frequency=16M/16/(499+1)=2K*/     /* PWM1 Mode configuration: Channel1     TIM2 Channel1 duty cycle = [TIM2_CCR1/(TIM2_ARR + 1)] * 100 = 50%*/     TIM2_OC1Init(TIM2_OCMODE_PWM1, TIM2_OUTPUTSTATE_ENABLE,250, TIM2_OCPOLARITY_HIGH);     TIM2_OC1PreloadConfig(ENABLE);   #elif PWM_Channel==PWM_Channel2     TIM2_TimeBaseInit(TIM2_PRESCALER_16, 999);     TIM2_OC2Init(TIM2_OCMODE_PWM2, TIM2_OUTPUTSTATE_ENABLE,500, TIM2_OCPOLARITY_HIGH);     TIM2_OC2PreloadConfig(ENABLE);   #elif PWM_Channel==PWM_Channel3     TIM2_TimeBaseInit(TIM2_PRESCALER_16, 499);     TIM2_OC3Init(TIM2_OCMODE_PWM1, TIM2_OUTPUTSTATE_ENABLE,250, TIM2_OCPOLARITY_HIGH);     TIM2_OC3PreloadConfig(ENABLE);   #endif   TIM2_Cmd(ENABLE); } void SetTIM2_PWM_Frequency(uint16_t TIM2_Period) {       /* Set the Autoreload value */     TIM2->ARRH = (uint8_t)(TIM2_Period >> 8);     TIM2->ARRL = (uint8_t)(TIM2_Period); } void SetTIM2_PWM_DutyCycle( uint16_t TIM2_Pulse) {   #if PWM_Channel==PWM_Channel1     /* Set the Pulse value */     TIM2->CCR1H = (uint8_t)(TIM2_Pulse >> 8);     TIM2->CCR1L = (uint8_t)(TIM2_Pulse);   #elif PWM_Channel==PWM_Channel2     TIM2->CCR2H = (uint8_t)(TIM2_Pulse >> 8);     TIM2->CCR2L = (uint8_t)(TIM2_Pulse);   #elif PWM_Channel==PWM_Channel3     TIM2->CCR3H = (uint8_t)(TIM2_Pulse >> 8);     TIM2->CCR3L = (uint8_t)(TIM2_Pulse);   #endif } void TestPWM_LED(void) {   u16 Duty_Val;   for(Duty_Val=0;Duty_Val<499;Duty_Val++)   {     SetTIM2_PWM_DutyCycle(Duty_Val);     Delay(0xfff);   } }