12864LCD显示倒计时程序
- 格式:doc
- 大小:35.00 KB
- 文档页数:12
简介:第一行显示,距离系统爆炸时间
第二行显示,还剩
第三行显示,00时,00分,00秒
第四行显示,周林
按下旋钮开关,开始设定秒,秒编辑位闪动。左右旋转设定数值,
在按下开关,秒确定,设定分,分编辑位闪动左右调数值,
再按下,分确定,小时位闪动。左右转调小时,再按一下。时间确定,开始倒计时。到达定时时间后停止,并闪动。
#include
#include
/********************* 定义********************************/
#define LCD_data P0 //数据口
sbit LCD_RS = P2 ^ 0; //寄存器选择输入
sbit LCD_RW = P2 ^ 1; //液晶读/写控制
sbit LCD_EN = P2 ^ 2; //液晶使能控制
sbit LCD_PSB = P2 ^ 3; //串/并方式控制
sbit LCD_RST = P2 ^ 5; //液晶复位端口
sbit sset=P3^4;//设置按钮
sbit spk=P1^4;
sbit sadd=P2^7;
sbit sdel=P2^6;
signed char second=0,minute=0,hour=0,count=0,keycount=0;
signed char key=0;
unsigned char code DIS1[] =
{
"距离系统爆炸时间"
};
unsigned char code DIS2[] =
{
"还剩:"
};
unsigned char code DIS31[] =
{
"时"
};
unsigned char code DIS32[] =
{
"分"
};
unsigned char code DIS33[] =
{
"秒"
};
unsigned char code DIS4[] =
{
"周林"
};
unsigned char code table2[]="0123456789";
char code reserve[3]_at_ 0x3b; //保留0x3b开始的3个字节
/*********************延时子函数**************************/
void delayNOP()//us延时子函数(4.34us)
{
_nop_();
_nop_();
_nop_();
_nop_();
}
void delayms(unsigned int ms)//ms延时子函数
{
unsigned char y;
while (ms--)
{
for (y = 0; y < 114; y++)
;
}
}
//******************检查LCD忙状态**************************
bit lcd_busy()//检查LCD忙状态1忙,0闲
{
bit result;
LCD_RS = 0;
LCD_RW = 1;
LCD_EN = 1;
delayNOP();
result = (bit)(P0 &0x80);
LCD_EN = 0;
return (result);
//***********************写指令数据***********************
void lcd_wcmd(unsigned char cmd)//写指令数据到LCD
{
while (lcd_busy())
{
;
}
LCD_RS = 0;
LCD_RW = 0;
LCD_EN = 1;
P0 = cmd;
delayNOP();
LCD_EN = 0;
}
void lcd_wdat(unsigned char dat)//写显示数据到LCD
{
while (lcd_busy())
;
LCD_RS = 1;
LCD_RW = 0;
LCD_EN = 1;
P0 = dat;
delayNOP();
LCD_EN = 0;
}
void writesmh(unsigned char add,unsigned char date)//显示个位和十位数据{
unsigned char shi,ge;
shi=date/10;
ge=date%10;
lcd_wcmd(0x80+add);
delayms(5);
lcd_wdat(table2[shi]);
delayms(5);
lcd_wdat(table2[ge]);
delayms(5);
}
//*********************初始化设定****************************