求单片机课程设计报告电子钟

[交通灯设计报告单片机课程设计]1. 利用单片机用8255做输出口，控制十二个发光二极管燃灭，模拟交通灯管理。 2. 熟悉键盘接口、动态显示接口、复位等电路的设计； 3. 熟悉可编程芯片8255的结构及其工作原理； 4....+阅读

*********************************************************** 单片机外接晶振的频率为12MHz。 ************************************************************/ #include #define LedData P0 #define LedSeg P2 code unsigned char LedCode[] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71, 0x40}; code unsigned char LedBit[] = {0xfe, 0xfd, 0xfb, 0xf7, 0xef, 0xdf, 0xbf, 0x7f}; unsigned char DisBuf[8]; unsigned char second = 50, min = 59 , hour = 23; unsigned char flag; void Delay ( unsigned int Time ) { unsigned int i; for (i=0; i>8; TL0 = -50000; TR0 = 1; ET0 = 1; EA = 1; while

(1) { WriteDisBuf(); Display(); } } void Int_T0 ( void ) interrupt 1 { TL0 = -50000; TH0 = (-50000) >>8; if ( ++flag >= 20 ) { flag = 0; if ( ++second >= 60 ) { second = 0; if ( ++min >= 60 ) { min = 0; if ( ++hour >= 24 ) hour = 0; } } } }