CH559 Arduino 使用 PWM2 的例子

#define SetPWMClk(CK_SE) (PWM_CK_SE = CK_SE)                                  //分频,默认时钟Fsys            
#define SetPWMCycle(Cycle) (PWM_CYCLE = Cycle)                                //设置循环周期
#define SetPWM1Dat(dat) (PWM_DATA = dat)                                      //设置PWM输出占空比
#define SetPWM2Dat(dat) (PWM_DATA2 = dat)

/*******************************************************************************
* Function Name  : InitPWM2(UINT8 polar)
* Description    : PWM初始化函数
* Input          : polar=0选择默认低电平，高电平输出有效;
                   polar=1选择默认高电平，低电平输出有效;
* Output         : None
* Return         : None
*******************************************************************************/
void  InitPWM2(uint8_t polar)
{
    PWM_CTRL &= ~bPWM_CLR_ALL;                                                //清空FIFO和计数                                                      
    PWM_CTRL &= ~bPWM_MOD_MFM;
    PWM_CTRL |=  bPWM_IE_END;                                                  //使能PWM计数周期完成中断
    PWM_CTRL |= bPWM2_OUT_EN;                                                 //PWM2输出使能  
    PWM_CTRL  |= bPWM_IF_END;                                                 //清除所有的中断标志
    if(polar){
        PWM_CTRL |= bPWM2_POLAR;                                              //低电平有效
    }
    else{
        PWM_CTRL &= ~bPWM2_POLAR;                                             //高电平有效  
    }     
}

void setup() {
  // put your setup code here, to run once:
    SetPWMClk(12);          //设置PWM1&2的时钟分频系数为12
    InitPWM2(0);            //PWM2初始化，高电平有效
    SetPWMCycle(1000);      //设置循环周期100
    SetPWM2Dat(50);         //PWM1占空比设置50/100
}

void loop() {
  // put your main code here, to run repeatedly:
}