基于51单片机的人体感应灯设计

/*函数原型：void setup(void)*/ /*功能：延时时间设置函数，通过矩阵式键盘可快速设置300s以内任意熄灯延时时间*/ /*调用函数：readkey()、delayms*/ /*入口参数：无*/ /*出口参数：无*/ #include <reg52.h> #include <delay.h> #include <readkey.h> #include <infrared.h> #include <showbuffer.h> void setup() { uint n; uchar key_val; uchar numcount = 0; set_sig_led = 0; //指示灯亮，表示正在设置延时时间 if(light == 1) { led = 0; } /*初始化6位数码管显示器：前三位为横杠，后三位全灭*/ for(n=0; n<3; n++) { buffer[n] = 0x0a; } for(n=3; n<6; n++) { buffer[n] = 0x0d; } showflag = 0x01; while(showflag == 0x01) { do { key_val = readkey(); }while(key_val == 16); /*扫描键盘直到有键按下*/ switch(key_val) { case 0:; case 1:; case 2:; case 3:; case 4:; case 5:; case 6:; case 7:; case 8:; case 9: if(numcount != 3) { buffer[numcount] = key_val; numcount++; } break; case 11: /*确认键*/ n = (uint)buffer[0]*100+(uint)buffer[1]*10+(uint)buffer[2]; if((numcount == 3)&&(n < 300)) { countdown = n; timedown = countdown; showflag = 0x00; set_sig_led = 1; led = 1; } else /*显示error并重新赋值*/ { buffer[0] = 0x0b; buffer[1] = 0x0c; buffer[2] = 0x0c; buffer[3] = 0x00; buffer[4] = 0x0c; buffer[5] = 0x0d; delayms(2000); for(n=0; n<3; n++) { buffer[n] = 0x0a; } for(n=3; n<6; n++) { buffer[n] = 0x0d; } } numcount = 0x00; break; case 12: /*删除键*/ if(numcount != 0x00) { numcount--; buffer[numcount] = 0x0a; } break; case 13: /*取消键*/ countdown = countdown; timedown = countdown; buffer[0] = timedown/100; buffer[1] = (timedown%100)/10; buffer[2] = timedown%10; set_sig_led = 1; led = 1; showflag = 0x00; break; default:break; } } }