如何用单片机的时间中断器来进行计时呢

998 单片机中断计时

问答对人有帮助，内容完整，我也想知道答案 0 如何用单片机的时间中断器来进行计时呢？其程序代码该怎样去实现呢？ 0
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答案对人有帮助，有参考价值 0 倒计时: 低级版没有闪用单片机的时间中断器（TR0-TR1）来进行计时来接近现实时间 #include #define uc8 unsigned char *it k1 = P3^4; it k2 = P3^5; it k3 = P3^6; it k4 = P3^7; bit db; it led1 = P2^4; it led2 = P2^5; it led3 = P2^6; it led4 = P2^7; uc8 i,sh = 0,bh = 0,m = 0,sm = 5,gf = 1,sf=0,ph = 0,count_num=0; unsigned char code xianshi[]={0x8f,0x4f,0x2f,0x1f};//ÊýÂë¹Ü¸÷Î»µÄÂë±í unsigned char code meidian[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};//ÊýÂë¹Ü¸÷Î»µÄÂë±í(´øÉÏÐ¡µã) unsigned char code youdian[]={0xbf,0x86,0xdb,0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef}; unsigned int value = 0; unsigned int value_conut = 0; void delay(unsigned char jk){ unsigned char j,k; for(j=jk;j>0;j--) for(k=112;k>0;k--); } void delay1(unsigned int jk){ unsigned int j,k; for(j=jk;j>0;j--) for(k=112;k>0;k--); } void display1(uc8 wei,uc8 shu)//ÔÚÈÎÒâÒ»Î»ÏÔÊ¾ÈÎÒâµÄÊý×Ö { wei=wei-1; P2 \|= 0xf0;//¸øP2.4-P2.7ÖÃ1 if(wei == 2) P0=youdian[shu]; else P0=meidian[shu]; P2=P2&xianshi[wei];//¸øP2ÐèÒªÏÔÊ¾µÄÄÇÒ»Î»ÖÃ1£¬ÆäËûÖÃ0 delay(1); } void display(unsigned char a,unsigned char b,unsigned char c,unsigned char d){ //Ò»´ÎÏÔÊ¾4¸öÊý×Ö£¬ÇÒÃ¿Î»ÏÔÊ¾Êý×Ö¿É×Ô¶¨¡£ display1(4,a); display1(3,b); display1(2,c); display1(1,d); } //void start_timer(){ // EA=1; //¿ª×ÜÖÐ¶Ï // ET0=1; //¿ª¶¨Ê±Æ÷0ÖÐ¶Ï // TR0=1; //´ò¿ª¶¨Ê±Æ÷ //} //void stop_timer(){ // ET0=0; //¹Ø¶¨Ê±Æ÷0ÖÐ¶Ï // EA=0; //¹Ø×ÜÖÐ¶Ï // TR0=0; //¹Ø±Õ¶¨Ê±Æ÷ //} void main() { TMOD = 0x01; TH0 = 0x0Dc; TL0 = 0x009; EA=1; //¿ª×ÜÖÐ¶Ï ET0=1; //¿ª¶¨Ê±Æ÷0ÖÐ¶Ï while(1){ // 按钮判断 if(!k1 && !db) { db = 1; TR0 = ~TR0; }else if(k1) { db = 0; } if(TR0) { P1 = 0xfe; }else { P1 = 0xff; } / if(k1 == 0) { delay1(4); if(k1 == 0) count_num++; if(count_num == 1) { start_timer(); P1 = 0xf0; }else if(count_num == 2) { stop_timer(); P1 = 0x0f; }else if(count_num == 3){ count_num = 1; start_timer(); P1 = 0xf0; } } / / if(k3 == 0){ // TMOD = 0x10; TH1 = 0x3C; TL1 = 0x0B0; ET1 = 1; TR1 = 1; if(k3 == 0 ) { if(value >= 60) { stop_timer(); P1 = 0x0f; sf=0; gf=1; sm=5; m=0; count_num = 0; }else { ET1 = 0; TR1 = 0; value = 0; } } } / if(k3 == 0){ if(value >= 280){ if(k3 == 0) { TR0 = 0; gf=1; sm=5; m=0; count_num = 0; value = 0; }else { value = 0; } } } if(gf == 0 && sm == 0 && m == 0) { P1 = 0xff; } //µ¹Êý¼ÆÊ± if(value < 277) { if(i == 1) { if(sh == 0) { if(bh == 0) { if(m == 0) { if(sm == 0) { if(gf == 0) { if(sf == 0) { P1 = 0xff; }else { sf--; gf = 10; } } else { gf--; sm = 10; } } else { sm--; m = 10; } } else { m--; bh = 10; } } else { bh--; sh= 10; } } else sh--; i = 0; } } display(sf,gf,sm,m); } } void Timer0Interrupt(void) interrupt 1 { TH0 = 0x0Dc; TL0 = 0x009; i++; if(k3 == 0) { value++; } //add your code here! } 倒计时：高配版有闪倒计时到最后十秒进行闪烁 #include it led1 = P2^4; it led2 = P2^5; it led3 = P2^6; it led4 = P2^7; it k1 = P3^4; *it k2 = P3^5; int lhj = 0,value = 0,i = 0, value_number = 0, smg1_light = 5, smg2_light = 2, smg3_light = 0, smg4_light = 0,flag = 0; bit db; unsigned char code light[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; void delay(unsigned int x) { unsigned int i,j; for(i = x;i > 0;i--){ for(j = 112;j > 0;j--){}; } } void main() { int value_fuzhi = 0; TMOD = 0x01; // TH0 = 0x0Dc; // TL0 = 0x009; TH0 = 0x3C; TL0 = 0x0B0; EA=1; //¿ª×ÜÖÐ¶Ï ET0=1; //¿ª¶¨Ê±Æ÷0ÖÐ¶Ï while(1){ if(!k1 && !db) { db = 1; TR0 = ~TR0; }else if(k1) { db = 0; } if(TR0) { P1 = 0xfe; }else { P1 = 0xff; } if(i == 20) { i = 0; smg1_light--; } if(smg1_light < 0) { smg2_light--; smg1_light = 9; } if(smg1_light == 0 && smg2_light == 1) { flag++; } // ¹Ø±ÕÏÔÊ¾ if(smg1_light >= 0 && smg2_light == 1 \|\| flag && value <= 4) { led4 = 0; led3 = 0; led2 = 0; led1 = 0; delay(1); } // ¿ªÆôÏÔÊ¾ if(smg1_light >= 0 && smg2_light == 1 \|\| smg2_light == 0 && value > 4 && value <= 10) { P0 = light[smg1_light]; P2 = 0x88; delay(1); P0 = light[smg2_light]; P2 = 0x48; delay(1); P0 = light[smg3_light]; P2 = 0x28; delay(1); P0 = light[smg4_light]; P2 = 0x18; delay(1); } if(lhj >= 20) { TR0 = 0; smg1_light = 5, smg2_light = 2, smg3_light = 0, smg4_light = 0; } if(smg1_light >= 0 && smg2_light > 1 \|\| smg2_light == 0 && smg1_light < 0) { P0 = light[smg1_light]; P2 = 0x88; delay(1); P0 = light[smg2_light]; P2 = 0x48; delay(1); P0 = light[smg3_light]; P2 = 0x28; delay(1); P0 = light[smg4_light]; P2 = 0x18; delay(1); } } } void Timer0Interrupt(void) interrupt 1 { TH0 = 0x3C; TL0 = 0x0B0; i++; if(flag) { value++; } if(value > 10) { value = 0; } if(smg1_light == 0 && smg2_light == 0 && smg3_light == 0 && smg4_light == 0 ) { lhj++; } if(lhj > 20) { lhj = 0; } //add your code here! }

2022-1-26 11:27:31 评论举报郭佳