LCD显示秒表89C51

1、代码部分:#include <reg51.h>#include <intrins.h>包含_nop_()空函数指令的头文件#define uchar unsigned char#define uint unsigned int#define out P0sbit RS=P2A0;sbit RW=P2A1；sbit E=P2A2;void lcd_initial(void);void check_busy(void);void write command(uchar com);void write_data(uchar dat);位变量位变量位变量/ LCD初始化函数检查

2、忙标志函数写命令函数写数据函数void string(uchar ad ,uchar *s);void str(uchar h,uchar g);/LCD 一个位置固定显示字符函数void lcd_test(void);void delay(uint);uchar tab尸'0','1','2','3','4','5','6','7','8','9'void main(void)主程序uchar t1,t2,t3,t4,t5,t6;lc

3、d_initial( );调用对LCD初始化函数string(0x87,":");string(0x84,":");string(0x89,"0");string(0x88,"0");string(0x86,"0");string(0x85,"0");string(0x83,"0");string(0x82,"0");t2=0;t3=1;t4=1;t5=1;t6=1;while(1)string(0x89,&tabt1);秒的十

4、位进1秒的十位满5进分的个位分的个位满9进分的十位t2+;str(0x88,tabt2);if(t2=0x6)t2=0x0;str(0x88,tabt2);str(0x86,tabt3);t3=t3+1;if(t3>0x9)t3=0;str(0x86,tabt3);str(0x85,tabt4);t4+；)if(t4>0x5)t4=0;str(0x84,tabt4);str(0x83,tabt5);t5=t5+1; if(t5>0x5)t5=0;str(0x83,tabt5);str(0x82,tabt6);t6=t6+1; if(t6>0x2) t6=0;str(0x

5、82,tabt6);分的十位满5进时的个位/时的个位满9进时的十位时的十位满2清零void delay(uint j)/1ms延时子程序uchar i=250;for(;j>0;j-)while(-i);检查忙标志函数写命令函数i=249;while(-i);i=250;)void check_busy(void)(uchar dt;do(dt=0xff;E=0;RS=0;RW=1;E=1;dt=out;while(dt&0x80);E=0;void write_command(uchar com)( check_busy();写数据函数液晶显不器初始化函数E=0;RS=0;RW

6、=0;out=com;E=1;_nop_();E=0;delay(1);) void write_data(uchar dat)(check_busy();E=0;RS=1;RW=0;out=dat;E=1;_nop_();E=0;delay(1);)void LCD_initial(void)(write_command(0x38);/写入命令0x38: 8位两行显示，5X7点阵字符write_command(0x0C);/写入命令0x0C：开整体显示，光标关，无黑块write_command(0x03);/写入命令 0x06:光标右移write_command(0x01); 写入命令 0x01：清屏delay(1);void string(uchar ad,uchar *s)输出显示字符串的函数(while(*s>0)(write_command(ad);write_data(*s+);输出字符串，且指针增1delay(1000);void str(uchar h,uchar g) 输出单个字符串函数(write_command(h);write_data(g)