LCD1602时钟(暂停、开始、修改)
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/*----------------------------------------------- 名称:LCD1602 论坛:www.doflye.net 编写:shifang 日期:2009.5 修改:无 内容:通过标准程序动态显示字符 引脚定义如下:1-VSS 2-VDD 3-V0 4-RS 5-R/W 6-E 7-14 DB0-DB7 15-BLA 16-BLK------------------------------------------------*/#include<reg52.h> //包含头文件,一般情况不需要改动,头文件包含特殊功能寄存器的定义#include<intrins.h>sbit RS = P2^6; //定义端口 sbit RW = P2^5;sbit EN = P2^7;sbit Beep = P3^0;sbit KEY1 = P1^0; //暂停sbit KEY2 = P1^1; //开始sbit KEY3 = P1^2; //选择哪一位操作sbit KEY4 = P1^3; //++sbit KEY5 = P1^4; //--sbit KEY6 = P1^5;#define RS_CLR RS=0 #define RS_SET RS=1#define RW_CLR RW=0 #define RW_SET RW=1 #define EN_CLR EN=0#define EN_SET EN=1#define DataPort P0unsigned char hour,min,sec;unsigned int kkk;unsigned char flag = 1;unsigned char num = 0;unsigned char local = 0;unsigned char weizhi;//unsigned char hour1[] = "change hour";//unsigned char min1[] = "change min";//unsigned char sec1[] = "change sec";unsigned char KeyScan(void);/*------------------------------------------------ uS延时函数,含有输入参数 unsigned char t,无返回值 unsigned char 是定义无符号字符变量,其值的范围是 0~255 这里使用晶振12M,精确延时请使用汇编,大致延时 长度如下 T=tx2+5 uS ------------------------------------------------*/void DelayUs2x(unsigned char t){ while(--t);}/*------------------------------------------------ mS延时函数,含有输入参数 unsigned char t,无返回值 unsigned char 是定义无符号字符变量,其值的范围是 0~255 这里使用晶振12M,精确延时请使用汇编------------------------------------------------*/void DelayMs(unsigned char t){ while(t--) { //大致延时1mS DelayUs2x(245); DelayUs2x(245); }}/*------------------------------------------------ 判忙函数------------------------------------------------*/ bit LCD_Check_Busy(void) { DataPort= 0xFF; RS_CLR; RW_SET; EN_CLR; _nop_(); EN_SET; return (bit)(DataPort & 0x80); }/*------------------------------------------------ 写入命令函数------------------------------------------------*/ void LCD_Write_Com(unsigned char com) { // while(LCD_Check_Busy()); //忙则等待 DelayMs(5); RS_CLR; RW_CLR; EN_SET; DataPort= com; _nop_(); EN_CLR; }/*------------------------------------------------ 写入数据函数------------------------------------------------*/ void LCD_Write_Data(unsigned char Data) { //while(LCD_Check_Busy()); //忙则等待 DelayMs(5); RS_SET; RW_CLR; EN_SET; DataPort= Data; _nop_(); EN_CLR; }/*------------------------------------------------ 清屏函数------------------------------------------------*/ void LCD_Clear(void) { LCD_Write_Com(0x01); DelayMs(5); }/*------------------------------------------------ 写入字符串函数------------------------------------------------*/ void LCD_Write_String(unsigned char x,unsigned char y,unsigned char *s) { if (y == 0) { LCD_Write_Com(0x80 + x); } else { LCD_Write_Com(0xC0 + x); } while (*s) { LCD_Write_Data( *s); s ++; } }/*------------------------------------------------ 写入字符函数------------------------------------------------*/ void LCD_Write_Char(unsigned char x,unsigned char y,unsigned char Data) { if (y == 0) { LCD_Write_Com(0x80 + x); } else { LCD_Write_Com(0xC0 + x); } LCD_Write_Data( Data); }/*------------------------------------------------ 初始化函数------------------------------------------------*/ void LCD_Init(void) { LCD_Write_Com(0x38); /*显示模式设置*/ DelayMs(5); LCD_Write_Com(0x38); DelayMs(5); LCD_Write_Com(0x38); DelayMs(5); LCD_Write_Com(0x38); LCD_Write_Com(0x08); /*显示关闭*/ LCD_Write_Com(0x01); /*显示清屏*/ LCD_Write_Com(0x06); /*显示光标移动设置*/ DelayMs(5); LCD_Write_Com(0x0C); /*显示开及光标设置*/ }void Delay(unsigned char i){ while(i--);}/*------------------------------------------------ 主函数------------------------------------------------*/ void main(void) { //unsigned char i; //unsigned char *p; LCD_Init(); /*while (1) { i = 1; p = "1234567890"; LCD_Clear(); LCD_Write_String(2,0,"Welcome to"); DelayMs(250); while (*p) { LCD_Write_Char(i,1,*p); i ++; p ++; DelayMs(250); } DelayMs(250); } */ TMOD = 0x01; TH0 = 0x3c; TL0 = 0xb0; EA = 1; ET0 = 1; TR0 = 1; hour = 12; min = 59; sec = 55; //Beep= 0; while(1) { num = KeyScan(); if(num == 1) { flag = 0; } if(num == 2) { flag = 1; } if(num == 3) { local++; if(local == 6) { local = 0; } switch(local) { case 5://LCD_Clear(); LCD_Write_String(2,1,"change sec01"); break; case 4://LCD_Clear(); LCD_Write_String(2,1,"change sec10"); break; case 3://LCD_Clear(); LCD_Write_String(2,1,"change min01"); break; case 2://LCD_Clear(); LCD_Write_String(2,1,"change min10"); break; case 1://LCD_Clear(); LCD_Write_String(2,1,"change hou01"); break; case 0://LCD_Clear(); LCD_Write_String(2,1,"change hou10"); break; } //LCD_Clear(); } if(num == 4) { switch(local) { case 5:sec++; if(sec >= 60) { min++; sec = 0; }break; case 4:sec += 10; if(sec >= 60) { min++; sec = 0; } break; case 3:min++; if(min >= 60) { hour++; min = 0; }break; case 2:min += 10; if(min >= 60) { hour++; min = 0; }break; case 1:hour++; if(hour >= 24) { sec = 0; min = 0; hour = 0; }break; case 0:hour += 10; if(hour >= 24) { sec = 0; min = 0; hour = 0; }break; } } if(num == 5) { switch(local) { case 5:sec--; if(sec <= 0) { min--; sec = 0; }break; case 4:sec -= 10; if(sec <= 0) { min--; sec = 0; }break; case 3:min--; if(min <= 0) { hour--; min = 59; }break; case 2:min -= 10; if(min <= 0) { hour--; min = 59; }break; case 1:hour--; if(hour <= 0) { sec = 0; min = 0; hour = 0; }break; case 0:hour -= 10; if(hour <= 0) { sec = 0; min = 0; hour = 0; }break; } } LCD_Write_Char(1,0,(hour/10)+ '0'); LCD_Write_Char(2,0,(hour%10)+ '0'); LCD_Write_Char(3,0,':'); LCD_Write_Char(4,0,(min/10)+ '0'); LCD_Write_Char(5,0,(min%10)+ '0'); LCD_Write_Char(6,0,':'); LCD_Write_Char(7,0,(sec/10)+ '0'); LCD_Write_Char(8,0,(sec%10)+ '0'); if(sec >= 60) { sec = 0; min++; for(kkk = 0;kkk < 100;kkk++) { Beep = !Beep; Delay(50); } } if(min >= 60) { min = 0; hour++; /*for(kkk = 0;kkk < 100;kkk++) { Beep = !Beep; Delay(50); }*/ } if(hour >= 24) { hour = 0; min = 0; sec = 0; } }}void ISR_T0(void) interrupt 1{ unsigned char i; TH0 = 0x3c; TL0 = 0xb0; if(flag == 1) { i++; if(i == 20) { i = 0; sec++; } }}unsigned char KeyScan(void){ if(!KEY1) //如果检测到低电平,说明按键按下 { Delay(10); //延时去抖,一般10-20ms if(!KEY1) //再次确认按键是否按下,没有按下则退出 { while(!KEY1);//如果确认按下按键等待按键释放,没有则退出 { return 1; } } } else if(!KEY2) //如果检测到低电平,说明按键按下 { Delay(10); //延时去抖,一般10-20ms if(!KEY2) //再次确认按键是否按下,没有按下则退出 { while(!KEY2);//如果确认按下按键等待按键释放,没有则退出 { return 2; } } } else if(!KEY3) //如果检测到低电平,说明按键按下 { Delay(10); //延时去抖,一般10-20ms if(!KEY3) //再次确认按键是否按下,没有按下则退出 { while(!KEY3);//如果确认按下按键等待按键释放,没有则退出 { return 3; } } } else if(!KEY4) //如果检测到低电平,说明按键按下 { Delay(10); //延时去抖,一般10-20ms if(!KEY4) //再次确认按键是否按下,没有按下则退出 { while(!KEY4);//如果确认按下按键等待按键释放,没有则退出 { return 4; } } } else if(!KEY5) //如果检测到低电平,说明按键按下 { Delay(10); //延时去抖,一般10-20ms if(!KEY5) //再次确认按键是否按下,没有按下则退出 { while(!KEY5);//如果确认按下按键等待按键释放,没有则退出 { return 5; } } } else if(!KEY6) //如果检测到低电平,说明按键按下 { Delay(10); //延时去抖,一般10-20ms if(!KEY6) //再次确认按键是否按下,没有按下则退出 { while(!KEY6);//如果确认按下按键等待按键释放,没有则退出 { return 6; } } } else return 0;}
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