[问答]

这段程序问题出现在哪，还请指教？

问答对人有帮助，内容完整，我也想知道答案 0 #include "reg51.h" typedef unsigned char BYTE; typedef unsigned int WORD; //----------------------------------------------- /* define constants / #define FOSC 11059200L #define T1MS (65536-FOSC/12/1000) //1ms timer calculation method in 12T mode / define SFR / it TEST_LED = P1^0; //work LED, flash once per second it pwm1 = P1^1; it pwm2 = P1^2; it pwm3 = P1^3; it pwm4 = P1^4; it k1=P1^5; it k2=P1^6; it k3=P1^7; *it k4=P2^0; / define variables / WORD count; //1000 times counter WORD a,b,c; WORD time; WORD p1,p2,p3,p4; //----------------------------------------------- / Timer0 interrupt routine / void tm0_isr() interrupt 1 using 1 { TL0 = T1MS; //reload timer0 low byte TH0 = T1MS >> 8; //reload timer0 high byte if (count++ == 100) //1ms 1000 -> 1s { count = 0; //reset counter TEST_LED = ! TEST_LED; //work LED flash } if (count<=p1) { pwm1=0; } else{pwm1=1;} if (count<=p2) { pwm2=0; } else{pwm2=1;} if (count<=p3) { pwm3=0; } else{pwm3=1;} if (count<=p4) { pwm4=0; } else{pwm4=1;} //----------------------------------------------- /* main program */ void main() { while (1){ if (k1==0) { for(a=0;a++;a<10000) { if(a<5000) { if(k1==1) { for(b=0;b++;b<10000) { if(k1==0) { p1=80; p2=60; p3=90; p4=80; TMOD = 0x01; //set timer0 as mode1 (16-bit) TL0 = T1MS; //initial timer0 low byte TH0 = T1MS >> 8; //initial timer0 high byte TR0 = 1; //timer0 start running ET0 = 1; //enable timer0 interrupt EA = 1; //open global interrupt switch count = 0; //initial counter b=10000; a=10000; } else { a=10000; b=10000; } } } } if(a>4999) { if(k3==0&&k1==0) { p1=100; p2=60; p3=90; p4=80; TMOD = 0x01; //set timer0 as mode1 (16-bit) TL0 = T1MS; //initial timer0 low byte TH0 = T1MS >> 8; //initial timer0 high byte TR0 = 1; //timer0 start running ET0 = 1; //enable timer0 interrupt EA = 1; //open global interrupt switch count = 0; //initial counter } else { if(k1==0) { p1=100; p2=80; p3=80; p4=100; TMOD = 0x01; //set timer0 as mode1 (16-bit) TL0 = T1MS; //initial timer0 low byte TH0 = T1MS >> 8; //initial timer0 high byte TR0 = 1; //timer0 start running ET0 = 1; //enable timer0 interrupt EA = 1; //open global interrupt switch count = 0; //initial counter } } } } if (k3==0) { p1=100; p2=0; p3=0; p4=100; TMOD = 0x01; //set timer0 as mode1 (16-bit) TL0 = T1MS; //initial timer0 low byte TH0 = T1MS >> 8; //initial timer0 high byte TR0 = 1; //timer0 start running ET0 = 1; //enable timer0 interrupt EA = 1; //open global interrupt switch count = 0; //initial counter } else { p1=100; p2=0; p3=0; p4=0;TMOD = 0x01; //set timer0 as mode1 (16-bit) TL0 = T1MS; //initial timer0 low byte TH0 = T1MS >> 8; //initial timer0 high byte TR0 = 1; //timer0 start running ET0 = 1; //enable timer0 interrupt EA = 1; //open global interrupt switch count = 0; //initial counter } } else { if (k2==0) { p1=50; p2=100; p3=0; p4=0; TMOD = 0x01; //set timer0 as mode1 (16-bit) TL0 = T1MS; //initial timer0 low byte TH0 = T1MS >> 8; //initial timer0 high byte TR0 = 1; //timer0 start running ET0 = 1; //enable timer0 interrupt EA = 1; //open global interrupt switch count = 0; //initial counter } else { if (k3==0) { p1=0; p1=40; p1=100; p1=0; TMOD = 0x01; //set timer0 as mode1 (16-bit) TL0 = T1MS; //initial timer0 low byte TH0 = T1MS >> 8; //initial timer0 high byte TR0 = 1; //timer0 start running ET0 = 1; //enable timer0 interrupt EA = 1; //open global interrupt switch count = 0; //initial counter } else { if (k4==0) { p1=0; p2=30; p3=0; p4=100; TMOD = 0x01; //set timer0 as mode1 (16-bit) TL0 = T1MS; //initial timer0 low byte TH0 = T1MS >> 8; //initial timer0 high byte TR0 = 1; //timer0 start running ET0 = 1; //enable timer0 interrupt EA = 1; //open global interrupt switch count = 0; //initial counter } } } } } } //loop } 0 已退回7积分
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