部分源程序如下： //=================测速计数处理=================================== void timer1()interrupt 3 {time1++;} //+++++++++++++++++测速转换处理+++++++++++++++++++++++ void int1()interrupt 2 { long kA=0; uchar temp; TR1=0; if(SP_bit==0) {TR1=1;SP_bit=1;} else { kA=time1*65536+TH1*256+TL1; temp=2500000/kA; SP_out=temp; TH1=0x00; TL1=0x00; time1=0x00; TR1=0; SP_bit=0; } } //================PWM处理与数据采集处理函数=================== void PWM_generator() interrupt 1 using 0 { if(flag==1) { a--; if(a==0) {flag=0; if(K_B_bit==1) a=UK; else a=SP_in; } else {OUT_PWM=0;} } if(flag==0) { b--; if(b==0) {flag=1; if(K_B_bit==1) b=0xff-UK; else b=0xff-SP_in; } else {OUT_PWM=1;} } m++; if(m==20) { m=0; n++; if(n==40) { n=0; EK0=SP_in-SP_out; PI_bit=1; } } }