2020年11月04日 | 单片机+LCD12864数字电压表设计

单片机源程序如下:

//---库函数声明及相关定义---//

#include

#include

#define unint unsigned int

#define unchar unsigned char

#define Databus P1 /*液晶数据总线*/

sbit RS=P3^3;      /*数据指令 选择*/

sbit RW=P3^4;      /*读写 选择*/

sbit EN=P3^2;      /*读写使能*/

sbit cs1=P3^6;     /*片选1*/

sbit cs2=P3^7;     /*片选2*/

sbit clock=P0^4;//时钟线

sbit dout=P0^2;//数据输出端

sbit cs=P0^3;//片选（低电平有效）

sbit        DQ=P0^2;//ds18b20与单片机连接口

float f_temp;//浮点型温度值   

unsigned int tvalue;//温度值

unsigned char tflag;      

unsigned int temp=0;

unsigned char SegBuf[4]={0};

/********************************/

/* 定义中文字库    */

/********************************/

unchar code Hzk[]={

        0x40,0x20,0x10,0x0C,0xE3,0x22,0x22,0x22,0xFE,0x22,0x22,0x22,0x22,0x02,0x00,0x00, //年//0

        0x04,0x04,0x04,0x04,0x07,0x04,0x04,0x04,0xFF,0x04,0x04,0x04,0x04,0x04,0x04,0x00,

        0x00,0x00,0x00,0x00,0x00,0xFF,0x11,0x11,0x11,0x11,0x11,0xFF,0x00,0x00,0x00,0x00,//月//1

        0x00,0x40,0x20,0x10,0x0C,0x03,0x01,0x01,0x01,0x21,0x41,0x3F,0x00,0x00,0x00,0x00,

        0x00,0x00,0x00,0xFE,0x42,0x42,0x42,0x42,0x42,0x42,0x42,0xFE,0x00,0x00,0x00,0x00,//日//2

        0x00,0x00,0x00,0x3F,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x3F,0x00,0x00,0x00,0x00,

        0x00,0x00,0x00,0xBE,0x2A,0x2A,0x2A,0xEA,0x2A,0x2A,0x2A,0x2A,0x3E,0x00,0x00,0x00,//星//3

        0x00,0x48,0x46,0x41,0x49,0x49,0x49,0x7F,0x49,0x49,0x49,0x49,0x49,0x41,0x40,0x00,

        0x00,0x04,0xFF,0x54,0x54,0x54,0xFF,0x04,0x00,0xFE,0x22,0x22,0x22,0xFE,0x00,0x00,//期//4

        0x42,0x22,0x1B,0x02,0x02,0x0A,0x33,0x62,0x18,0x07,0x02,0x22,0x42,0x3F,0x00,0x00,

        0x00,0xFC,0x44,0x44,0x44,0xFC,0x10,0x90,0x10,0x10,0x10,0xFF,0x10,0x10,0x10,0x00,//时//5

        0x00,0x07,0x04,0x04,0x04,0x07,0x00,0x00,0x03,0x40,0x80,0x7F,0x00,0x00,0x00,0x00,

        0x80,0x40,0x20,0x98,0x87,0x82,0x80,0x80,0x83,0x84,0x98,0x30,0x60,0xC0,0x40,0x00,//分//6

        0x00,0x80,0x40,0x20,0x10,0x0F,0x00,0x00,0x20,0x40,0x3F,0x00,0x00,0x00,0x00,0x00,

        0x12,0x12,0xD2,0xFE,0x91,0x11,0xC0,0x38,0x10,0x00,0xFF,0x00,0x08,0x10,0x60,0x00,//秒//7

        0x04,0x03,0x00,0xFF,0x00,0x83,0x80,0x40,0x40,0x20,0x23,0x10,0x08,0x04,0x03,0x00,

0x00,0x40,0x42,0x42,0x42,0x42,0x42,0xFE,0x42,0x42,0x42,0x42,0x42,0x42,0x40,0x00,//天//8

0x00,0x80,0x40,0x20,0x10,0x08,0x06,0x01,0x02,0x04,0x08,0x10,0x30,0x60,0x20,0x00,

0x00,0xC0,0xC0,0xC0,0xC0,0xC0,0xC0,0xC0,0xC0,0xC0,0xC0,0xC0,0xC0,0xC0,0xC0,0x00,//一//9

0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

0x00,0x00,0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x04,0x06,0x04,0x00,0x00,0x00,//二//10

0x00,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x18,0x10,0x00,

0x00,0x04,0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x84,0x04,0x00,0x00,//三//11

0x00,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x00,

0x00,0xFE,0x02,0x02,0x02,0xFE,0x02,0x02,0xFE,0x02,0x02,0x02,0x02,0xFE,0x00,0x00,//四//12

0x00,0x7F,0x28,0x24,0x23,0x20,0x20,0x20,0x21,0x22,0x22,0x22,0x22,0x7F,0x00,0x00,

0x00,0x02,0x82,0x82,0x82,0x82,0xFE,0x82,0x82,0x82,0xC2,0x82,0x02,0x00,0x00,0x00,//五//13

0x20,0x20,0x20,0x20,0x20,0x3F,0x20,0x20,0x20,0x20,0x3F,0x20,0x20,0x30,0x20,0x00,

0x10,0x10,0x10,0x10,0x10,0x91,0x12,0x1E,0x94,0x10,0x10,0x10,0x10,0x10,0x10,0x00,//六//14

0x00,0x40,0x20,0x10,0x0C,0x03,0x01,0x00,0x00,0x01,0x02,0x0C,0x78,0x30,0x00,0x00,

0x00,0x40,0x42,0x44,0x4C,0x40,0x40,0x7F,

      0x40,0x40,0x48,0x44,0xE6,0x40,0x00,0x00,

      0x00,0x40,0x44,0x44,0x44,0x44,0x44,0x44,

      0x44,0x44,0x44,0x44,0xFF,0x00,0x00,0x00,//当//15

0x08,0x08,0xE8,0x29,0x2A,0x2E,0xE8,0x08,

      0x08,0xCC,0x0A,0x0B,0xE8,0x0C,0x08,0x00,

      0x00,0x00,0xFF,0x09,0x49,0x89,0x7F,0x00,

      0x00,0x0F,0x40,0x80,0x7F,0x00,0x00,0x00,//前//16

0x00,0xF8,0x48,0x48,0x48,0x48,0xFF,0x48,//电//17

      0x48,0x48,0x48,0xFC,0x08,0x00,0x00,0x00,

      0x00,0x07,0x02,0x02,0x02,0x02,0x3F,0x42,

      0x42,0x42,0x42,0x47,0x40,0x70,0x00,0x00,

0x00,0x00,0xFE,0x02,0x82,0x82,0x82,0x82,

      0xFE,0x82,0x82,0x82,0xC3,0x82,0x00,0x00,

      0x40,0x30,0x0F,0x40,0x40,0x40,0x40,0x40,

      0x7F,0x40,0x42,0x44,0x4C,0x60,0x40,0x00,//压//18

0x00,0x00,0x00,0x00,0x7F,0x49,0x49,0x49,

      0x49,0x49,0x7F,0x00,0x00,0x80,0x00,0x00,

      0x01,0x81,0x41,0x21,0x1D,0x21,0x41,0x7F,

      0x89,0x89,0x8D,0x89,0x81,0xC1,0x41,0x00,//是//19

0x00,0x00,0x00,0x00,0x80,0xC0,0xC0,0x80,

      0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

      0x00,0x00,0x00,0x00,0x31,0x7B,0x7B,0x31,

      0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,//://20

0x80,0x40,0x20,0xF8,0x27,0x20,0x20,0x20,//伏//21

      0x20,0xFF,0x20,0x24,0x28,0x38,0x20,0x00,

      0x00,0x00,0x00,0xFF,0x80,0x40,0x20,0x18,

      0x06,0x01,0x06,0x18,0x60,0xC0,0x40,0x00

                         };

/****************************************/

/* 定义ASCII字库8列*16行    */

/****************************************/

unchar code Ezk[]={

/*此字体下对应的点阵为：宽x高=8x16   --*/

/*-- 宋体12; 此字体下对应的点阵为：宽x高=8x16   --*/

        0x00,0x00,0xF0,0xF8,0x08,0x68,0xF8,0xF0,0x00,0x00,0x07,0x0F,0x0B,0x08,0x0F,0x07, //0

        0x00,0x20,0x20,0x30,0xF8,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x0F,0x0F,0x00,0x00,  //1

        0x00,0x30,0x38,0x08,0x88,0xF8,0x70,0x00,0x00,0x0C,0x0E,0x0B,0x09,0x08,0x08,0x00, //        2

        0x00,0x30,0x38,0x88,0x88,0xF8,0x70,0x00,0x00,0x06,0x0E,0x08,0x08,0x0F,0x07,0x00, //3

        0x00,0x00,0xF8,0xF8,0x00,0xE0,0xE0,0x00,0x00,0x03,0x03,0x02,0x02,0x0F,0x0F,0x02,//4

        0x00,0xF8,0xF8,0x88,0x88,0x88,0x08,0x00,0x00,0x08,0x08,0x08,0x0C,0x07,0x03,0x00,//5

        0x00,0xC0,0xE0,0x78,0x58,0xC8,0x80,0x00,0x00,0x07,0x0F,0x08,0x08,0x0F,0x07,0x00,//6

        0x00,0x08,0x08,0x88,0xE8,0x78,0x18,0x00,0x00,0x00,0x0E,0x0F,0x01,0x00,0x00,0x00,//7

        0x00,0x70,0xF8,0xC8,0x88,0xF8,0x70,0x00,0x00,0x07,0x0F,0x08,0x09,0x0F,0x07,0x00,//8

        0x00,0xF0,0xF8,0x08,0x08,0xF8,0xF0,0x00,0x00,0x00,0x09,0x0D,0x0F,0x03,0x01,0x00,//9

                0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,  // - -//10

        0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

        0x00,0x80,0x80,0xE0,0xE0,0x80,0x80,0x00,  // -+-//11

        0x00,0x00,0x00,0x03,0x03,0x00,0x00,0x00,

        0x80,0x80,0x80,0x80,0x80,0x80,0x80,0x00,  // ---//12

        0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,

        0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,  // -.-//13

        0x00,0x00,0x00,0x0C,0x0C,0x00,0x00,0x00

};

/*状态检查，LCD是否忙*/

void CheckState()   

{

   unchar dat;       /*状态信息,判断是否忙*/

   RS=0;             /*数据指令选择，D/I（RS）=“L” ，表示 DB7∽DB0 为显示指令数据*/

   RW=1;             /*R/W=“H” ，E=“H”数据被读到DB7∽DB0*/

   do{

      Databus=0x00;

      EN=1;          /*EN下降源*/

      _nop_();       /*一个时钟延时*/

      dat=Databus;

      EN=0;

      dat=0x80 & dat;/*仅当第7位为0时才可操作(判别busy信号)*/

      }while(!(dat==0x00));

}

/*写命令到LCD中*/

SendCommandToLCD(unchar com)

{

   CheckState();/*状态检查，LCD是否忙*/

   RS=0;        /*向LCD发送命令。RS=0写指令，RS=1写数据*/

   RW=0;        /*R/W=“L” ，E=“H→L”数据被写到 IR 或 DR */

   Databus=com; /*com :命令*/

   EN=1;        /*EN下降沿*/

   _nop_();

   _nop_();

   EN=0;

}

/*设置页 0xb8是页的首地址*/

void SetLine(unchar page)   

{

        page=0xb8|page; /*1011 1xxx 0<=page<=7 设定页地址--X 0-7,8行为一页64/8=8，共8页*/

        SendCommandToLCD(page);

}

/*设定显示开始行，0xc0是行的首地址*/

void SetStartLine(unchar startline)        

{

        startline=0xc0|startline;    /*1100 0000*/

        SendCommandToLCD(startline); /*设置从哪行开始：0--63，一般从0 行开始显示*/

}

/*设定列地址--Y 0-63 ，0x40是列的首地址*/

void SetColumn(unchar column)   

{

        column=column &0x3f; /*column最大值为64，越出 0=        column= 0x40|column; /*01xx xxxx*/

        SendCommandToLCD(column);

}

/*开关显示，0x3f是开显示，0x3e是关显示*/

void SetOnOff(unchar onoff)   

{

    onoff=0x3e|onoff; /*0011 111x,onoff只能为0或者1*/

    SendCommandToLCD(onoff);

}

/*写显示数据 */

void WriteByte(unchar dat)

{

   CheckState();/*状态检查，LCD是否忙*/

   RS=1;        /*RS=0写指令，RS=1写数据*/

   RW=0;        /*R/W=“L” ，E=“H→L”数据被写到 IR 或 DR */

   Databus=dat;    /*dat:显示数据*/

   EN=1;        /*EN下降沿*/

   _nop_();

   _nop_();

   EN=0;

}

/*选择屏幕screen: 0-全屏,1-左屏,2-右屏*/

void SelectScreen(unchar screen)      

{               

   switch(screen)

   {

     case 0: cs1=0;/*全屏*/