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這是一個(gè)中斷程序用來(lái)控制舵機(jī)的
我想請(qǐng)問(wèn)下
那個(gè)switch的語(yǔ)句在中斷中是如何執(zhí)行的
各個(gè)case是如何執(zhí)行的？
謝謝大家！
void Init_Timer0()
{
TMOD=0x11;
TH0=(65536-500)/256;
TL0=(65536-500)%256;
EA=1;
ET0=1;
TR0=1;
PT0=1;
}
void timer0(void) interrupt 1
{
if(flag_0==1) PWM_Value[0]+=1;
if(flag_0==2) PWM_Value[0]-=1;
if(flag_1==1) PWM_Value[1]+=1;
if(flag_1==2) PWM_Value[1]-=1;
if(PWM_Value[0]>=2500)
PWM_Value[0]=2500;
if(PWM_Value[1]>=2500)
PWM_Value[1]=2500;
if(PWM_Value[0]<=500)
PWM_Value[0]=500;
if(PWM_Value[1]<=500)
PWM_Value[1]=500;
switch(order)
{
case 1:PWM_OUT0=1;
TH0=(65536-PWM_Value[0])>>8;
TL0=(uchar)(65536-PWM_Value[0]);
break;
case 2:PWM_OUT0=0;
TH0=(65536-(5000-PWM_Value[0]))>>8;
TL0=(uchar)(65536-(5000-PWM_Value[0]));
break;
case 3:PWM_OUT1=1;
TH0=(65536-PWM_Value[1])>>8;
TL0=(uchar)(65536-PWM_Value[1]);
break;
case 4:PWM_OUT1=0;
TH0=(65536-(5000-PWM_Value[1]))>>8;
TL0=(uchar)(65536-(5000-PWM_Value[1]));
break;
case 5:
TH0=60536>>8;
TL0=(uchar)60536;
break;
case 6:
TH0=60536>>8;
TL0=(uchar)60536;
order=0;
break;
default: order=0;
break;
}
order++;
}
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