智能電子時(shí)鐘（定時(shí)、報(bào)警、燈光自動(dòng)調(diào)節(jié)）
#include<reg52.h> //包含頭文件，一般情況不需要改動(dòng)，頭文件包含特殊功能寄存器的定義#include<intrins.h>unsigned char sec = 0;unsigned char min = 0;unsigned char hour = 0;unsigned char count = 0;unsigned char flag = 0;unsigned char flag1 = 0;unsigned char p[3] = {0};unsigned char num=255;bit ack; //應(yīng)答標(biāo)志位sbit SDA=P2^1;sbit SCL=P2^0;sbit RS = P2^4; //定義端口 sbit RW = P2^5;sbit EN = P2^6;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;sbit buzz = P2^2;#define AddWr 0x90 //寫數(shù)據(jù)地址 #define AddRd 0x91 //讀數(shù)據(jù)地址extern bit ack;bit WriteDAC(unsigned char dat);#define _Nop() _nop_() //定義空指令 #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 P0/*------------------------------------------------ uS延時(shí)函數(shù)，含有輸入?yún)?shù) unsigned char t，無(wú)返回值 unsigned char 是定義無(wú)符號(hào)字符變量，其值的范圍是 0~255 這里使用晶振12M，精確延時(shí)請(qǐng)使用匯編,大致延時(shí) 長(zhǎng)度如下 T=tx2+5 uS ------------------------------------------------*/void DelayUs2x(unsigned char t){ while(--t);}/*------------------------------------------------ mS延時(shí)函數(shù)，含有輸入?yún)?shù) unsigned char t，無(wú)返回值 unsigned char 是定義無(wú)符號(hào)字符變量，其值的范圍是 0~255 這里使用晶振12M，精確延時(shí)請(qǐng)使用匯編------------------------------------------------*/void DelayMs(unsigned char t){ while(t--) { //大致延時(shí)1mS DelayUs2x(245); DelayUs2x(245); }}/*------------------------------------------------ 啟動(dòng)總線------------------------------------------------*/void Start_I2c(){ SDA=1; //發(fā)送起始條件的數(shù)據(jù)信號(hào) _Nop(); SCL=1; _Nop(); //起始條件建立時(shí)間大于4.7us,延時(shí) _Nop(); _Nop(); _Nop(); _Nop(); SDA=0; //發(fā)送起始信號(hào) _Nop(); //起始條件鎖定時(shí)間大于4μ _Nop(); _Nop(); _Nop(); _Nop(); SCL=0; //鉗住I2C總線，準(zhǔn)備發(fā)送或接收數(shù)據(jù) _Nop(); _Nop();}/*------------------------------------------------ 結(jié)束總線------------------------------------------------*/void Stop_I2c(){ SDA=0; //發(fā)送結(jié)束條件的數(shù)據(jù)信號(hào) _Nop(); //發(fā)送結(jié)束條件的時(shí)鐘信號(hào) SCL=1; //結(jié)束條件建立時(shí)間大于4μ _Nop(); _Nop(); _Nop(); _Nop(); _Nop(); SDA=1; //發(fā)送I2C總線結(jié)束信號(hào) _Nop(); _Nop(); _Nop(); _Nop();}/*---------------------------------------------------------------- 字節(jié)數(shù)據(jù)傳送函數(shù) 函數(shù)原型: void SendByte(unsigned char c);功能: 將數(shù)據(jù)c發(fā)送出去,可以是地址,也可以是數(shù)據(jù),發(fā)完后等待應(yīng)答,并對(duì) 此狀態(tài)位進(jìn)行操作.(不應(yīng)答或非應(yīng)答都使ack=0 假) 發(fā)送數(shù)據(jù)正常，ack=1; ack=0表示被控器無(wú)應(yīng)答或損壞。------------------------------------------------------------------*/void SendByte(unsigned char c){ unsigned char BitCnt; for(BitCnt=0;BitCnt<8;BitCnt++) //要傳送的數(shù)據(jù)長(zhǎng)度為8位 { if((c<<BitCnt)&0x80)SDA=1; //判斷發(fā)送位 else SDA=0; _Nop(); SCL=1; //置時(shí)鐘線為高，通知被控器開(kāi)始接收數(shù)據(jù)位 _Nop(); _Nop(); //保證時(shí)鐘高電平周期大于4μ _Nop(); _Nop(); _Nop(); SCL=0; } _Nop(); _Nop(); SDA=1; //8位發(fā)送完后釋放數(shù)據(jù)線，準(zhǔn)備接收應(yīng)答位 _Nop(); _Nop(); SCL=1; _Nop(); _Nop(); _Nop(); if(SDA==1)ack=0; else ack=1; //判斷是否接收到應(yīng)答信號(hào) SCL=0; _Nop(); _Nop();}/*---------------------------------------------------------------- 字節(jié)數(shù)據(jù)傳送函數(shù) 函數(shù)原型: unsigned char RcvByte();功能: 用來(lái)接收從器件傳來(lái)的數(shù)據(jù),并判斷總線錯(cuò)誤(不發(fā)應(yīng)答信號(hào))， 發(fā)完后請(qǐng)用應(yīng)答函數(shù)。 ------------------------------------------------------------------*/ unsigned char RcvByte(){ unsigned char retc; unsigned char BitCnt; retc=0; SDA=1; //置數(shù)據(jù)線為輸入方式 for(BitCnt=0;BitCnt<8;BitCnt++) { _Nop(); SCL=0; //置時(shí)鐘線為低，準(zhǔn)備接收數(shù)據(jù)位 _Nop(); _Nop(); //時(shí)鐘低電平周期大于4.7us _Nop(); _Nop(); _Nop(); SCL=1; //置時(shí)鐘線為高使數(shù)據(jù)線上數(shù)據(jù)有效 _Nop(); _Nop(); retc=retc<<1; if(SDA==1)retc=retc+1; //讀數(shù)據(jù)位,接收的數(shù)據(jù)位放入retc中 _Nop(); _Nop(); } SCL=0; _Nop(); _Nop(); return(retc);}/*---------------------------------------------------------------- 應(yīng)答子函數(shù)原型: void Ack_I2c(void); ----------------------------------------------------------------*/void Ack_I2c(void){ SDA=0; _Nop(); _Nop(); _Nop(); SCL=1; _Nop(); _Nop(); //時(shí)鐘低電平周期大于4μ _Nop(); _Nop(); _Nop(); SCL=0; //清時(shí)鐘線，鉗住I2C總線以便繼續(xù)接收 _Nop(); _Nop(); }/*---------------------------------------------------------------- 非應(yīng)答子函數(shù)原型: void NoAck_I2c(void); ----------------------------------------------------------------*/void NoAck_I2c(void){ SDA=1; _Nop(); _Nop(); _Nop(); SCL=1; _Nop(); _Nop(); //時(shí)鐘低電平周期大于4μ _Nop(); _Nop(); _Nop(); SCL=0; //清時(shí)鐘線，鉗住I2C總線以便繼續(xù)接收 _Nop(); _Nop(); }/*---------------------------------------------------------------- 向無(wú)子地址器件發(fā)送字節(jié)數(shù)據(jù)函數(shù) 函數(shù)原型: bit ISendByte(unsigned char sla,ucahr c); 功能: 從啟動(dòng)總線到發(fā)送地址，數(shù)據(jù)，結(jié)束總線的全過(guò)程,從器件地址sla. 如果返回1表示操作成功，否則操作有誤。注意： 使用前必須已結(jié)束總線。----------------------------------------------------------------*//*bit ISendByte(unsigned char sla,unsigned char c){ Start_I2c(); //啟動(dòng)總線 SendByte(sla); //發(fā)送器件地址 if(ack==0)return(0); SendByte(c); //發(fā)送數(shù)據(jù) if(ack==0)return(0); Stop_I2c(); //結(jié)束總線 return(1);}*//*---------------------------------------------------------------- 向有子地址器件發(fā)送多字節(jié)數(shù)據(jù)函數(shù) 函數(shù)原型: bit ISendStr(unsigned char sla,unsigned char suba,ucahr *s,unsigned char no); 功能: 從啟動(dòng)總線到發(fā)送地址，子地址,數(shù)據(jù)，結(jié)束總線的全過(guò)程,從器件 地址sla，子地址suba，發(fā)送內(nèi)容是s指向的內(nèi)容，發(fā)送no個(gè)字節(jié)。 如果返回1表示操作成功，否則操作有誤。注意： 使用前必須已結(jié)束總線。----------------------------------------------------------------*/bit ISendStr(unsigned char sla,unsigned char suba,unsigned char *s,unsigned char no){ unsigned char i; for(i=0;i<no;i++) { Start_I2c(); //啟動(dòng)總線 SendByte(sla); //發(fā)送器件地址 if(ack==0)return(0); SendByte(suba); //發(fā)送器件子地址 if(ack==0)return(0); SendByte(*s); //發(fā)送數(shù)據(jù) if(ack==0)return(0); Stop_I2c(); //結(jié)束總線 DelayMs(1); //必須延時(shí)等待芯片內(nèi)部自動(dòng)處理數(shù)據(jù)完畢 s++; suba++; } return(1);}/*---------------------------------------------------------------- 向無(wú)子地址器件讀字節(jié)數(shù)據(jù)函數(shù) 函數(shù)原型: bit IRcvByte(unsigned char sla,ucahr *c); 功能: 從啟動(dòng)總線到發(fā)送地址，讀數(shù)據(jù)，結(jié)束總線的全過(guò)程,從器件地 址sla，返回值在c. 如果返回1表示操作成功，否則操作有誤。注意： 使用前必須已結(jié)束總線。----------------------------------------------------------------*//*bit IRcvByte(unsigned char sla,unsigned char *c){ Start_I2c(); //啟動(dòng)總線 SendByte(sla+1); //發(fā)送器件地址 if(ack==0)return(0); *c=RcvByte(); //讀取數(shù)據(jù) NoAck_I2c(); //發(fā)送非就答位 Stop_I2c(); //結(jié)束總線 return(1);}*//*---------------------------------------------------------------- 向有子地址器件讀取多字節(jié)數(shù)據(jù)函數(shù) 函數(shù)原型: bit ISendStr(unsigned char sla,unsigned char suba,ucahr *s,unsigned char no); 功能: 從啟動(dòng)總線到發(fā)送地址，子地址,讀數(shù)據(jù)，結(jié)束總線的全過(guò)程,從器件 地址sla，子地址suba，讀出的內(nèi)容放入s指向的存儲(chǔ)區(qū)，讀no個(gè)字節(jié)。 如果返回1表示操作成功，否則操作有誤。注意： 使用前必須已結(jié)束總線。----------------------------------------------------------------*/bit IRcvStr(unsigned char sla,unsigned char suba,unsigned char *s,unsigned char no){ unsigned char i; Start_I2c(); //啟動(dòng)總線 SendByte(sla); //發(fā)送器件地址 if(ack==0)return(0); SendByte(suba); //發(fā)送器件子地址 if(ack==0)return(0); Start_I2c(); SendByte(sla+1); if(ack==0)return(0); for(i=0;i<no-1;i++) { *s=RcvByte(); //發(fā)送數(shù)據(jù) Ack_I2c(); //發(fā)送就答位 s++; } *s=RcvByte(); NoAck_I2c(); //發(fā)送非應(yīng)位 Stop_I2c(); //結(jié)束總線 return(1);}/*------------------------------------------------ 判忙函數(shù)------------------------------------------------*/ bit LCD_Check_Busy(void) { DataPort= 0xFF; RS_CLR; RW_SET; EN_CLR; _nop_(); EN_SET; return (bit)(DataPort & 0x80); } /*------------------------------------------------ 寫入DA轉(zhuǎn)換數(shù)值輸入?yún)?shù)：dat 表示需要轉(zhuǎn)換的DA數(shù)值，范圍是0-255------------------------------------------------*/bit WriteDAC(unsigned char dat){ Start_I2c(); //啟動(dòng)總線 SendByte(AddWr); //發(fā)送器件地址 if(ack==0)return(0); SendByte(0x40); //發(fā)送器件子地址 if(ack==0)return(0); SendByte(dat); //發(fā)送數(shù)據(jù) if(ack==0)return(0); Stop_I2c(); } /*--------------------------------------------------- 按鍵控制 --------------------------------------------------*/void push_button(){ if(!key5) { DelayMs(10); if(!key5) { while(!key5); EA = 0; } } if(!key1) //1 { DelayMs(10); if(!key1) { while(!key1); sec++; if(sec == 60) { sec = 0; min++; } } } if(!key2) //2 { DelayMs(10); if(!key2) { while(!key2); sec--; if(sec == 255) { sec = 59; min--; } } } if (!key3)//3 { DelayMs(10); if(!key3) { while(!key3); min++; if(min == 60) { min = 0; hour++; } } } if(!key4)//4 { DelayMs(10); if(!key4) { while(!key4); min--; if(min == 255) { min = 59; if((hour-1) == 255) { hour = 23; } } } } if(!key7) //7 { EA = 1; } if(!key6)//6 { sec = 0; min = 0; hour = 0; EA = 1; } if(!key8)//8 { DelayMs(10); if(!key8) { while(!key8); hour++; if(hour == 24) { hour = 0; } } }}/*------------------------------------------------ 寫入命令函數(shù)------------------------------------------------*/ void LCD_Write_Com(unsigned char com) { // while(LCD_Check_Busy()); //忙則等待 DelayMs(5); RS_CLR; RW_CLR; EN_SET; DataPort= com; _nop_(); EN_CLR; }/*------------------------------------------------ 寫入數(shù)據(jù)函數(shù)------------------------------------------------*/ void LCD_Write_Data(unsigned char Data) { //while(LCD_Check_Busy()); //忙則等待 DelayMs(5); RS_SET; RW_CLR; EN_SET; DataPort= Data; _nop_(); EN_CLR; }/*------------------------------------------------ 清屏函數(shù)------------------------------------------------*/ void LCD_Clear(void) { LCD_Write_Com(0x01); DelayMs(5); }/*------------------------------------------------ 寫入字符串函數(shù)------------------------------------------------*/ 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 ++; } }/*------------------------------------------------ 寫入字符函數(shù)------------------------------------------------*/ 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); }/*------------------------------------------------ 初始化函數(shù)------------------------------------------------*/ void LCD_Init(void) { LCD_Write_Com(0x38); /*顯示模式設(shè)置*/ DelayMs(5); LCD_Write_Com(0x38); DelayMs(5); LCD_Write_Com(0x38); DelayMs(5); LCD_Write_Com(0x38); LCD_Write_Com(0x08); /*顯示關(guān)閉*/ LCD_Write_Com(0x01); /*顯示清屏*/ LCD_Write_Com(0x06); /*顯示光標(biāo)移動(dòng)設(shè)置*/ DelayMs(5); LCD_Write_Com(0x0C); /*顯示開(kāi)及光標(biāo)設(shè)置*/ } /*------------------------------------------------ 主函數(shù)------------------------------------------------*/ void main(void) { IRcvStr(0xae,0,p,8); hour = p[2]; min = p[1]; sec = p[0]; LCD_Init(); TMOD = 0x01; TL0 = 0xb0; TH0 = 0x3c; EA = 1; ET0 = 1; TR0 = 1; while(1) { LCD_Write_Char(7,0,0X30 + sec%10);// p[0] = sec%10 + 0x30; LCD_Write_Char(6,0,0X30 + sec/10); p[0] = sec; LCD_Write_Char(5,0,0x3a); LCD_Write_Char(4,0,0X30 + min%10); p[1] = min; LCD_Write_Char(3,0,0X30 + min/10);// p[3] = min/10 + 0x30; LCD_Write_Char(2,0,0x3a); LCD_Write_Char(1,0,0X30 + hour%10); p[2] = hour; LCD_Write_Char(0,0,0X30 + hour/10);// p[5] = hour/10 + 0x30; ISendStr(0xae,0,p,8); p[0] = 0; p[1] = 0; p[2] = 0; push_button(); if(flag1) //等于10秒時(shí)，LED慢慢變亮，等于40秒時(shí)LED自動(dòng)關(guān)閉 { WriteDAC(num); if(num != 0 ) { num--; } } else { num = 255; WriteDAC(num); } }}void time0_isr(void) interrupt 1{ count++; EA = 0; TH0 = 0x3C; TL0 = 0xb0; if(count == 20) { count = 0; sec++; if(sec == 60)//用于顯示0~9 { sec = 0; min++; flag = 0; } if(min == 60) { min = 0; hour++; flag = 1; } if(hour == 24) { hour = 0; } if(sec == 10) { flag1 = 1; } if(sec == 40) { flag1 = 0; } } EA = 1; if(flag) { buzz = ~buzz; P3 = 0x00; DelayMs(10); P3 = 0xff; DelayMs(10); } }
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