一,1號按鈕按下,1號2號燈亮,延時5秒后,2號滅,3號燈亮,2號按鈕按下,1號3號燈滅。
(4個獨立按鍵:P32外中斷0 P34定時器0 P36WR P37RD;P3_3外中斷1,P3_5定時器1)
#include<at89x52.h> #include<intrins.h>//參數左移頭文件 #define uint unsigned int #define uchar unsigned char uchar temp,aa,numdu,numwe; sbit dula=P2^6;//定義dula sbit wela=P2^7;//定義wela uchar code table[]={ 0x3f,0x06,0x5b,0x4f, 0x66,0x6d,0x7d,0x07, 0x7f,0x6f,0x77,0x7c, 0x39,0x5e,0x79,0x71};//數給的格試uchar code table[]={}在{}中要寫入數據 uchar code tablewe[]={ 0xfe,0xfd,0xfb,0xf7,0xef,0xdf}; void main() { numdu=0; numwe=0; aa=0; TMOD=0x01;//對TMOD付值也可寫:TMOD=1; TH0=(65536-50000)/256;//THO初值,"/"為求莫,(65536-50000)/256放到高8位中 TL0=(65536-50000)%256;//HO初值,"*"為求余,(65536-50000)%256放到低8位中 EA=1;//開總中斷 ET0=1;//開定時器中斷 TR0=1;//啟動定時器 /*定時器/計數器設置流程 1對TMOD賦值,以確定T0及T1的工作方式; 2計算初值,并將其值寫入TH0,TL0或TH1,TL1中; 3中斷方式時,則對IE賦值,開放中斷; 4致TR0或TR1置位,啟動定時/計數器定時或計數 */ while(1) { if(P3_2==0) { P1_4=0; P0_0=0; P0_1=0; } if(aa==100) { aa=0; P0_1=1; P0_2=0; } if(P3_4==0) { P1_4=0; P0_0=1; P0_2=1; } } } void timer0() interrupt 1 { TH0=(65536-50000)/256; TL0=(65536-50000)%256; aa++; }
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