危機處理-呼吸燈

阿阿阿，去夏威夷爽了一個禮拜來補個上禮拜作業

主程式不難，比較麻煩的部分是PWM的設定



主程式:

while(1){
    int n;
    key=Scankey();
    DrvSYS_Delay(15000);
    //if(key!=0)break;
    
    if(key==1&&n!=1){
      light1(1);
      n=1;
    }
    if(key==2&&n!=2){
      
      light2(1);
      n=2;
    }
    if(key==3&&n!=3){
    
      light3(1);
      n=3;
    }
    if(key==4&&n!=4){
   
      light4(1);
      n=4;
    }
}

light 函式:
原理就是此函式指定的燈會漸亮(for迴圈)
同時其他任何有亮的燈都會漸暗( if(Duty_Cycle<100) )

void light1(int x){
  //if(x==0)K=-K;
  for(int i=0; i<10; i++){
    Duty_CycleA=Duty_CycleA-K*10;
    CMRA = (Duty_CycleA*CNRA)/100 ; //Duty Cycle(Unit:%)
    PWMA->CMR0=CMRA;
    if(Duty_CycleB<100){
      Duty_CycleB=Duty_CycleB+K*10;
      CMRB = (Duty_CycleB*CNRB)/100 ; //Duty Cycle(Unit:%)
      PWMA->CMR1=CMRB;
    }
    if(Duty_CycleC<100){
      Duty_CycleC=Duty_CycleC+K*10;
      CMRC = (Duty_CycleC*CNRC)/100 ; //Duty Cycle(Unit:%)
      PWMA->CMR2=CMRC;
    }
    if(Duty_CycleD<100){
      Duty_CycleD=Duty_CycleD+K*10;
      CMRD = (Duty_CycleD*CNRD)/100 ; //Duty Cycle(Unit:%)
      PWMA->CMR3=CMRD;
    }
    DrvSYS_Delay(200000);
  }
}

PWM設定:

void InitPWM(void)
{
  /* 1.Setup clock source divider select register (CSR) */  
  SYSCLK->APBCLK.PWM01_EN = 1;         //Enable PWM clock
  /*改這邊*/SYSCLK->CLKSEL1.PWM01_S = 0;         //00=external(12M), 01=32.768k, 10=HCLK, 11=22.1184M
  /*改這邊*/PWMA->CSR.CSR0=0;           //000=2, 001=4, 010=8, 011=16, 100=1
  SYSCLK->APBCLK.PWM23_EN = 1;         
  /*改這邊*/SYSCLK->CLKSEL1.PWM01_S = 0;         
  /*改這邊*/PWMA->CSR.CSR1=0;         
  SYSCLK->APBCLK.PWM45_EN = 1;         
  /*改這邊*/SYSCLK->CLKSEL1.PWM23_S = 0;         
  /*改這邊*/PWMA->CSR.CSR2=0;    
   SYSCLK->APBCLK.PWM67_EN = 1;         
  /*改這邊*/SYSCLK->CLKSEL1.PWM23_S = 0;         
  /*改這邊*/PWMA->CSR.CSR3=0; 
  
  /* 2.Setup pre-scaler (PPR) */
  /*改這邊*/PWMA->PPR.CP01=1;   //Prescaler 0~255, Setting 0 to stop output clock
  /*改這邊*/PWMA->PPR.CP23=1;
  /*改這邊*/PWMA->PPR.DZI01=1;
  /*改這邊*/PWMA->PPR.DZI23=1; 
  /* 3.Setup inverter on/off,
  /* 3.Setup inverter on/off, dead zone generator on/off, auto-reload/ one-shot mode and Stop PWM-timer (PCR)*/
  PWMA->PCR.CH0MOD=1;   //0:One-shot mode, 1:Auto-load mode  
  PWMA->PCR.CH0INV=0;   //Inverter->0:off, 1:on
  
  PWMA->PCR.CH1MOD=1;    
  PWMA->PCR.CH1INV=0;
  
  PWMA->PCR.CH2MOD=1;    
  PWMA->PCR.CH2INV=0; 
  
  PWMA->PCR.CH3MOD=1;    
  PWMA->PCR.CH3INV=0; 
  
  /* 5.Setup PWM down-counter register (CNR) for setting PWM period. */      
  /*改這邊*/PWMA->CNR0=60000;                  //Counter Register 0~65535
  /*改這邊*/PWMA->CNR1=60000;
  /*改這邊*/PWMA->CNR2=60000;
  /*改這邊*/PWMA->CNR3=60000;
  /* 4.Setup comparator register (CMR) for setting PWM duty. */
  PWMA->CMR0=60000;                  //Compare Register 0~65535
  PWMA->CMR1=60000;
  PWMA->CMR2=60000;
  PWMA->CMR3=60000;
  //Frequency =  clock source/[(prescale+1)*(clock divider)*(CNR+1)];
  //Duty ratio    = (CMR+1)/(CNR+1).
  
  /* 7.Setup corresponding GPIO pins as PWM function (enable POE and disable CAPENR) for the corresponding PWM channel.  */ 
  SYS->GPAMFP.PWM0_AD13=1;
  PWMA->POE.PWM0=1;//Output to pin->0:Diasble, 1:Enable
  
  SYS->GPAMFP.PWM1_AD14=1;
  PWMA->POE.PWM1=1;
  
  SYS->GPAMFP.PWM2_AD15=1;
  PWMA->POE.PWM2=1;
  
  SYS->GPAMFP.PWM3_I2SMCLK=1;
  PWMA->POE.PWM3=1;
  //PWMA->POE.SPI0_MISO0_I2SDI=1;
  /* 8.Enable PWM timer start running (Set CHxEN = 1 in PCR) */
  PWMA->PCR.CH0EN=1;   //PWM function->0:Disable, 1:Enable
  PWMA->PCR.CH1EN=1;
  PWMA->PCR.CH2EN=1;
  PWMA->PCR.CH3EN=1;
}

就先這樣囉，有空再更新細部說明
掰噗!