LCD1602A-5V使用說明和程序

ID:427921 · 發(fā)表于 2018-11-29 15:06

#include <reg51.h>
#include <intrins.h>
//#include <at89x51.h>
sbit LCD_RS=P1^0;//定義引腳
sbit LCD_RW=P1^1;
sbit LCD_E=P1^2;
#define LCD_Data P2
#define Busy 0x80 //用于檢測LCD狀態(tài)字中的Busy標(biāo)識(shí)
void WriteDataLCD(unsigned char WDLCD);
void WriteCommandLCD(unsigned char WCLCD,BuysC);
unsigned char ReadDataLCD(void);
unsigned char ReadStatusLCD(void);
void LCDInit(void);
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData);
void Delay5Ms(void);
void Delay400Ms(void);
unsigned char code uctech[] = {"ic2012.taobao.co"};
unsigned char code net[] = {"Happy every day!"};
void main(void)
{
Delay400Ms(); //啟動(dòng)等待，等LCD講入工作狀態(tài)
LCDInit(); //LCM初始化
Delay5Ms(); //延時(shí)片刻(可不要)
DisplayListChar(0, 0, uctech);
DisplayListChar(0, 5, net);
ReadDataLCD();//測試用句無意義
while(1);
}
//寫數(shù)據(jù)
void WriteDataLCD(unsigned char WDLCD)
{
ReadStatusLCD(); //檢測忙
LCD_Data = WDLCD;
LCD_RS = 1;
LCD_RW = 0;
LCD_E = 0; //若晶振速度太高可以在這后加小的延時(shí)
LCD_E = 0; //延時(shí)
LCD_E = 1;
}
//寫指令
void WriteCommandLCD(unsigned char WCLCD,BuysC) //BuysC為0時(shí)忽略忙檢測
{
if (BuysC) ReadStatusLCD(); //根據(jù)需要檢測忙
LCD_Data = WCLCD;
LCD_RS = 0;
LCD_RW = 0;
LCD_E = 0;
LCD_E = 0;
LCD_E = 1;
}
//讀數(shù)據(jù)
unsigned char ReadDataLCD(void)
{
LCD_RS = 1;
LCD_RW = 1;
LCD_E = 0;
LCD_E = 0;
LCD_E = 1;
return(LCD_Data);
}
//讀狀態(tài)
unsigned char ReadStatusLCD(void)
{
LCD_Data = 0xFF;
LCD_RS = 0;
LCD_RW = 1;
LCD_E = 0;
LCD_E = 0;
LCD_E = 1;
while (LCD_Data & Busy); //檢測忙信號(hào)
return(LCD_Data);
}
void LCDInit(void) //LCM初始化
{
LCD_Data = 0;
WriteCommandLCD(0x38,0); //三次顯示模式設(shè)置，不檢測忙信號(hào)
Delay5Ms();
WriteCommandLCD(0x38,0);
Delay5Ms();
WriteCommandLCD(0x38,0);
Delay5Ms();
WriteCommandLCD(0x38,1); //顯示模式設(shè)置,開始要求每次檢測忙信號(hào)
WriteCommandLCD(0x08,1); //關(guān)閉顯示
WriteCommandLCD(0x01,1); //顯示清屏
WriteCommandLCD(0x06,1); // 顯示光標(biāo)移動(dòng)設(shè)置
WriteCommandLCD(0x0C,1); // 顯示開及光標(biāo)設(shè)置
}
//按指定位置顯示一個(gè)字符
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
{
Y &= 0x1;
X &= 0xF; //限制X不能大于15，Y不能大于1
if (Y) X |= 0x40; //當(dāng)要顯示第二行時(shí)地址碼+0x40;
X |= 0x80; // 算出指令碼
WriteCommandLCD(X, 0); //這里不檢測忙信號(hào)，發(fā)送地址碼
WriteDataLCD(DData);
}
//按指定位置顯示一串字符
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)
{
unsigned char ListLength;
ListLength = 0;
Y &= 0x1;
X &= 0xF; //限制X不能大于15，Y不能大于1
while (DData[ListLength]>=0x20) //若到達(dá)字串尾則退出
{
if (X <= 0xF) //X坐標(biāo)應(yīng)小于0xF
{
DisplayOneChar(X, Y, DData[ListLength]); //顯示單個(gè)字符
ListLength++;
X++;
}
}
}
//5ms延時(shí)
void Delay5Ms(void)
{
unsigned int TempCyc = 5552;
while(TempCyc--);
}
//400ms延時(shí)
void Delay400Ms(void)
{
unsigned char TempCycA = 5;
unsigned int TempCycB;
while(TempCycA--)
{
TempCycB=7269;
while(TempCycB--);
};
}

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