1602LCD显示的秒表 C语言程序

源程序代码：

//名称：用1602LCD设计的秒表

//说明：首先按下K1键时开始计时，自此按下时暂停，第三次按下时继续累积计时，再次按下时停止计时，K2键用于清零秒表。 //

#include #include #define uchar unsigned char #define uint unsigned int

#define delayNOP ( ) ﹛_nop_( ); _nop_( ); _nop_( ); _nop_( );﹜

//LCD控制函数

void LCD_Initialize( ); void LCD_Set_POS(uchar); void LCD_Write_Date(uchar);

void Display_String(uchar﹡,uchar);

sbit K1 = P1^0; sbit K2 = P1^1; sbit BEEP = P3^0; sbit LCD_RS = P2^0; sbit LCD_RW = P2^1; sbit LCD_EN = P2^2; uchar KeyCount = 0;

uchar code msg1[] = ﹛〞Second Watch 0 〞﹜; uchar code msg2[] = ﹛〞>>>> 0 〞﹜; uchar code Prompts[] [16] = {

﹛〞:: 1- - - - > 〞﹜,

﹛〞:: 1- - - - > ::2 〞﹜, ﹛〞:: 1 - >2 ::3- - > 〞﹜, ﹛〞:: 1 - >2 ::3- - >4 〞﹜ };

// 计时缓冲与显示缓冲

uchar Time_Buffer[] ={0,0,0,0};

uchar LCD_Display_Buffer[]={〞00: 00: 00:00〞}; // // 蜂鸣器 //

void Beep () ﹛

uchar i,j = 70; for (i = 0;i< 180;i++ ) ﹛

while(--j);BEEP = ～BEEP; ﹜ BEEP = 0; ﹜ // // 延时 //

void DelayX(uint ms) {

uchar i; ﹜ //

// 显示计时

while(ms--) for (i= 0;i< 120;i++);

//

void Show_Second( ) {

uchar i;

LCD_Set_POS(0x45); //设置LCD显示起点 {

//将两位整数的1/100s，秒，分，时转换为8位数字字符

LCD_Display_Buffer[2﹡i+1] = Time_Buffer[i] / 10 + ˊ0 ˊ; LCD_Display_Buffer[2﹡i] = Time_Buffer[i] % 10 + ˊ0 ˊ; //在 = 3,2,1,0时分别显示时，分，秒，1/100s LCD_Writer_Date(LCD_Display_Buffer[2﹡i+1]) LCD_Writer_Date(LCD_Display_Buffer[2﹡i]) LCD_Writer_Date(ˊ: ˊ) } } //

// Time0中断 //

Void Time0( ) interrupt 1 using 0 {

THO = -10000 / 256; TLO = -10000 % 256; Time_Buffer[0] ++ if(Time_Buffer[0] == 100) {

Time_Buffer[0] = 0; Time_Buffer[1]++;

}

if(Time_Buffer[1] == 60) //秒 for(i = 3;i != 0xff ;i--);

{

Time_Buffer[1] = 0; Time_Buffer[2]++;

}

if(Time_Buffer[2] == 60) //分 {

Time_Buffer[2] = 0; Time_Buffer[3]++;

}

if(Time_Buffer[3] == 24) // Time_Buffer[3] = 0;

} // //主函数 //

void main( ) {

uchar i; IE = 0x82; TMOD = 0x01; THO = -10000 / 256; TLO = -10000 % 256; LCD_Initialize( );

Display_String(msg1,0x00); Display_String(msg2,0x40); While(1) {

if(k1 == 0) {

DelayX(100); i = ++KeyCount;

时