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標題: LCD顯示 [打印本頁]

作者: 桂XXX 時間: 2017-5-9 17:37
標題: LCD顯示
#include "qxmcs51_config.h"
#include "delay.h"
#include "LCD1602.H"

#define LCD1602_DataPort P0    //LCD1602數據端口
//INT8U strDEC[4];
INT8U strHEX[3];//INT8UtostrHEX函數轉換的字符串顯示16進制
/*
INT8U *INT8UtostrDEC(INT8U num)
{
INT8U i2, i1, i0,i;
i2 = num / 100;
i1 = num % 100 / 10;
i0 = num % 100 % 10;
strDEC[i]=i2+48;
i++;
strDEC[i]=i1+48;
i++;
strDEC[i]=i0+48;
i++;
strDEC[i] = '\0';
return strDEC;
}
*/
INT8U *INT8UtostrHEX(INT8U num) //將一個字節的數據轉換為字符串
{
INT8U i = 0;
switch(num/16)
{
case 0: strHEX[i] = '0'; i++; break;
case 1: strHEX[i] = '1'; i++; break;
case 2: strHEX[i] = '2'; i++; break;
case 3: strHEX[i] = '3'; i++; break;
case 4: strHEX[i] = '4'; i++; break;
case 5: strHEX[i] = '5'; i++; break;
case 6: strHEX[i] = '6'; i++; break;
case 7: strHEX[i] = '7'; i++; break;
case 8: strHEX[i] = '8'; i++; break;
case 9: strHEX[i] = '9'; i++; break;
case 10: strHEX[i] = 'A'; i++; break;
case 11: strHEX[i] = 'B'; i++; break;
case 12: strHEX[i] = 'C'; i++; break;
case 13: strHEX[i] = 'D'; i++; break;
case 14: strHEX[i] = 'E'; i++; break;
case 15: strHEX[i] = 'F'; i++; break;
}

switch(num%16)
{
case 0: strHEX[i] = '0'; i++; break;
case 1: strHEX[i] = '1'; i++; break;
case 2: strHEX[i] = '2'; i++; break;
case 3: strHEX[i] = '3'; i++; break;
case 4: strHEX[i] = '4'; i++; break;
case 5: strHEX[i] = '5'; i++; break;
case 6: strHEX[i] = '6'; i++; break;
case 7: strHEX[i] = '7'; i++; break;
case 8: strHEX[i] = '8'; i++; break;
case 9: strHEX[i] = '9'; i++; break;
case 10: strHEX[i] = 'A'; i++; break;
case 11: strHEX[i] = 'B'; i++; break;
case 12: strHEX[i] = 'C'; i++; break;
case 13: strHEX[i] = 'D'; i++; break;
case 14: strHEX[i] = 'E'; i++; break;
case 15: strHEX[i] = 'F'; i++; break;
}
strHEX[i] = '\0';
return (strHEX);
}

BOOL LCD1602_Check_Busy() //LCD1602忙判斷
{
LCD1602_DataPort = 0xFF;
LCD_RS = 0; //根據規定，RS為低電平，RW為高電平時，可以讀狀態
LCD_RW = 1;
LCD_EN = 0;
_nop_();
LCD_EN = 1;
return (BOOL)(LCD1602_DataPort & 0x80);
}
/*
void LCD1602_Clear()
{
LCD1602_Write_Com(0x01); //顯示清屏
Delay_Ms(5);
}*/
/*
INT8U LCDE1602_DATAP_ADDR()
{
LCD1602_DataPort = 0xFF;
LCD_RS = 0; //根據規定，RS為低電平，RW為高電平時，可以讀狀態
LCD_RW = 1;
LCD_EN = 0;
_nop_();
LCD_EN = 1;
return (LCD1602_DataPort & 0x7f);
} */

void LCD1602_Write_Com(INT8U com)  //LCD1602寫命令
{
while(LCD1602_Check_Busy()); //忙則等待
LCD_RS = 0;
LCD_RW = 0;
LCD_EN = 1;
LCD1602_DataPort= com;
_nop_();
LCD_EN = 0;
}

void LCD1602_Write_Dat(INT8U dat)    //LCD1602寫數據
{
while(LCD1602_Check_Busy()); //忙則等待
LCD_RS = 1;
LCD_RW = 0;
LCD_EN = 1;
LCD1602_DataPort= dat;
_nop_();
LCD_EN = 0;
}

void LCD1602_Write_String(INT8U x,INT8U y,INT8U *s) //LCD1602寫字符串
{
if (y == 0)
{
LCD1602_Write_Com(0x80 + x);    //表示第一行
}
else
{
LCD1602_Write_Com(0xC0 + x);    //表示第二行
}
while (*s != '\0')
{
LCD1602_Write_Dat(*s++);
}
}

void LCD1602_Init() //LCD1602初始化
{
LCD1602_Write_Com(0x38); /*顯示模式設置*/
LCD1602_Write_Com(0x06); /*顯示光標移動設置*/
LCD1602_Write_Com(0x0C); /*顯示開及光標設置*/
LCD1602_Write_Com(0x01); /*顯示清屏*/
Delay_Ms(5);
}

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