新手__单片机LCD时钟(带时间设置功能有注释).doc

#include reg52.h sbit RS = P2^6; sbit RW = P2^5; sbit LCDEN = P2^7; sbit key1 = P1^0; sbit key2 = P1^1; sbit key3 = P1^2; sbit key4 = P1^3; sbit key5 = P1^4; sbit key6 = P1^5; sbit key7 = P1^6; sbit key8 = P1^7; #define N 50000 int count = 0; int year = 2000, month = 1, day = 1; int hour = 0, minute = 0, second = 0; unsigned char set_date_0[]=press key to set date; unsigned char set_date_1[]=2000.01.01; unsigned char set_time_0[]=00:00:00; unsigned char finish_set[]=setup complete; unsigned char year_1, year_2, year_3, year_4; unsigned char month_1, month_2; unsigned char day_1, day_2; unsigned char hour_1, hour_2; unsigned char minute_1, minute_2; unsigned char second_1, second_2; void delay_ms (unsigned int i) { int a,b; for (a = 0;a = i;a ++) for (b = 0;b = 901;b++); } void write_date (unsigned char date) { RS = 1; RW = 0; P0 = date; delay_ms (1); LCDEN = 1; delay_ms (1); LCDEN = 0; delay_ms(1); RS = 0; } void write_com (unsigned char com) { RS = 0; RW = 0; P0 = com; delay_ms (1); LCDEN = 1; delay_ms (1); LCDEN = 0; delay_ms (1); } void init (void) { EA = 1; ET0 = 1; TMOD = 0x01; TH0 = (65536 - N) / 256; TL0 = (65536 - N) % 256; write_com (0x38); write_com (0x08); write_com (0x01); write_com (0x06); write_com (0x0c); } void time_go (void) //走钟 { TR0 = 1; while(1) { if (count = 20) //每秒执行一次 { count = 0; second++; second_1 = second / 10; second_2 = second % 10; write_com (0x80 + 0x4a); write_date (second_1 + 0x30); write_date (second_2 + 0x30); if (second == 60) //满秒进分 { second = 0; minute++; write_com (0x80 + 0x47); minute_1 = minute / 10; minute_2 = minute % 10; write_date(minute_1 + 0x30); write_date(minute_2 + 0x30); write_com (0x80 + 0x4a); write_date(0); write_date(0); } if (minute == 61) //满分进小时 { minute = 0; hour++; write_com (0x80 + 0x44); hour_1 = hour / 10; ho