单片机+LCD+16个按键组成的显示电路包含原理图和源代码和Proteus仿真电路

//************************************************************************************************* //* * //* ***************************ＳＭＣ１６０２驱动程序************************* * //* * //************************************************************************************************* //************************************************************************************************* //* * //* ******************************头文件及宏定义************************** * //* * //************************************************************************************************* #include <at89x51.h> //<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<端口设置宏定义>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> #define LCDRS P3_5 //寄存器选择信号： // 0--数据寄存器； // 1--指令寄存器。 #define LCDRW P3_6 //读写信号： // 1--读LCD； // 0--写LCD。 #define LCDE P3_7 //片选信号，当输入下降沿信号时， //执行指令或传送数据。 #define LCDPORT P0 //LCD数据接口。 //************************************************************************************************* //* * //* ******************************延时函数***************************** * //* * //************************************************************************************************* void vDelay() { unsigned int uiCount; for(uiCount=0;uiCount<250;uiCount++); } //************************************************************************************************* //* * //* **************************把1个命令写入LCD************************* * //* * //************************************************************************************************* void vWriteCMD(unsigned char ucCommand) { vDelay(); //先延时。 LCDE=1; //然后把ＬＣＤ改为写入命令状态。 LCDRS=0; LCDRW=0; LCDPORT=ucCommand; //再输出命令。 LCDE=0; //最后执行命令。 } //************************************************************************************************* //* * //* ***************************把1个数据写入LCD************************ * //* * //************************************************************************************************* void vWriteData(unsigned char ucData) { vDelay(); //先延时。 LCDE=1; //然后把ＬＣＤ改为写入数据状态。 LCDRS=1; LCDRW=0; LCDPORT=ucData; //再输出数据。 LCDE=0; //最后显示数据。 } //************************************************************************************************* //* * //* **********************把1个字符显示到当前光标处********************* * //* * //************************************************************************************************* void vShowOneChar(unsigned char ucChar) { switch(ucChar) { case ' ': vWriteData(0x20);break; case '!': vWriteData(0x21);break; case '"': vWriteData(0x22);break; case '#': vWriteData(0x23);break; case '$': vWriteData(0x24);break; case '%': vWriteData(0x25);break; case '&': vWriteData(0x26);break; case '>': vWriteData(0x27);break; case '(': vWriteData(0x28);break; case ')': vWriteData(0x29);break; case '*': vWriteData(0x2A);break; case '+': vWriteData(0x2B);break; case '-': vWriteData(0x2D);break; case '.': vWriteData(0x2E);break; case '/': vWriteData(0x2F);break; case '=': vWriteData(0x3D);break; case '<': vWriteData(0x3E);break; case '?': vWriteData(0x3F);break; case '^': vWriteData(0x5E);break; case ':': vWriteData(0x3A);break; case '0': vWriteData(0x30);break; case '1': vWriteData(0x31);break; case '2': vWriteData(0x32);break; case '3': vWriteData(0x33);break; case '4': vWriteData(0x34);break; case '5': vWriteData(0x35);break; case '6': vWriteData(0x36);break; case '7': vWriteData(0x37);break; case '8': vWriteData(0x38);break; case '9': vWriteData(0x39);break; case 'A': vWriteData(0x41);break; case 'B': vWriteData(0x42);break; case 'C': vWriteData(0x43);break; case 'D': vWriteData(0x44);break; case 'E': vWriteData(0x45);break; case 'F': vWriteData(0x46);break; case 'G': vWriteData(0x47);break; case 'H': vWriteData(0x48);break; case 'I': vWriteData(0x49);break; case 'J': vWriteData(0x4A);break; case 'K': vWriteData(0x4B);break; case 'L': vWriteData(0x4C);break; case 'M': vWriteData(0x4D);break; case 'N': vWriteData(0x4E);break; case 'O': vWriteData(0x4F);break; case 'P': vWriteData(0x50);break; case 'Q': vWriteData(0x51);break; case 'R': vWriteData(0x52);break; case 'S': vWriteData(0x53);break; case 'T': vWriteData(0x54);break; case 'U': vWriteData(0x55);break; case 'V': vWriteData(0x56);break; case 'W': vWriteData(0x57);break; case 'X': vWriteData(0x58);break; case 'Y': vWriteData(0x59);break; case 'Z': vWriteData(0x5A);break; case 'a': vWriteData(0x61);break; case 'b': vWriteData(0x62);break; case 'c': vWriteData(0x63);break; case 'd': vWriteData(0x64);break; case 'e': vWriteData(0x65);break; case 'f': vWriteData(0x66);break; case 'g': vWriteData(0x67);break; case 'h': vWriteData(0x68);break; case 'i': vWriteData(0x69);break; case 'j': vWriteData(0x6A);break; case 'k': vWriteData(0x6B);break; case 'l': vWriteData(0x6C);break; case 'm': vWriteData(0x6D);break; case 'n': vWriteData(0x6E);break; case 'o': vWriteData(0x6F);break; case 'p': vWriteData(0x70);break; case 'q': vWriteData(0x71);break; case 'r': vWriteData(0x72);break; case 's': vWriteData(0x73);break; case 't': vWriteData(0x74);break; case 'u': vWriteData(0x75);break; case 'v': vWriteData(0x76);break; case 'w': vWriteData(0x77);break; case 'x': vWriteData(0x78);break; case 'y': vWriteData(0x79);break; case 'z': vWriteData(0x7A);break; default: break; } } //************************************************************************************************* //* * //* *********************把1个字符串显示到当前光标处******************* * //* * //************************************************************************************************* void vShowChar(unsigned char ucaChar[]) { unsigned char ucCount; for(ucCount=0;;ucCount++) { vShowOneChar(ucaChar[ucCount]); if(ucaChar[ucCount+1]=='\0') break; } } /* //************************************************************************************************* //* * //* *********************把1个3位数字显示到当前光标处******************* * //* * //************************************************************************************************* void vShowNumber(unsigned int uiNumber) { unsigned char ucaNumber[3],ucCount; if(uiNumber>999) uiNumber=999; ucaNumber[0]=uiNumber/100; //把计算数字的每个位存入数组。 ucaNumber[1]=(uiNumber-100*(int)ucaNumber[0])/10; ucaNumber[2]=uiNumber-100*(int)ucaNumber[0]-10*ucaNumber[1]; for(ucCount=0;ucCount<3;ucCount++) { vShowOneChar(ucaNumber[ucCount]+48); //从首位到末位逐一输出。 } } */