原创 lpc2131 lcd1602_test

lpc2131的lcd1602显示，基于easyarm2131完成，如下为代码部分：

/*******************************************************************
** File name: lcd1602_test
** Last modified Date:  2007-09-16
** Last Version:  0.9
*******************************************************************/
#include "config.h"

unsigned char LCM_Data = 0xFF;
#define LCM_RS  1<<8
#define LCM_RW  1<<9
#define LCM_E   1<<10
#define LED     1<<20

void WriteDataLCM(unsigned char WDLCM);
void WriteCommandLCM(unsigned char WCLCM, unsigned char BuysC);
unsigned char ReadDataLCM(void);
unsigned char ReadStatusLCM(void);
void LCMInit(void);
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char  *DData);
void Delay5Ms(void);
void Delay400Ms(void);
void IOInit(void);

unsigned char dle_net[] = {"**Easy_ARM2131**"};
unsigned char mail[] =    {"www.mcu123.com"};

int main (void)
{
IOInit();
LCMInit(); //LCM3?ê??ˉ
while(1)
{
DisplayListChar(0,0,dle_net);
DisplayListChar(0,1,mail);
}
}
//D′êy?Y
void WriteDataLCM(unsigned char WDLCM)
{
ReadStatusLCM(); //?ì2a?|
IO0SET=LCM_RS ;
IO0CLR=LCM_RW ;
IO0CLR=LCM_Data;  
IO0SET=WDLCM;
Delay5Ms();
IO0CLR=LCM_E ; //è??§???ù?èì????éò??ú?aoó?óD?μ??óê±
Delay5Ms();
IO0SET=LCM_E ;
}

//D′??á?
void WriteCommandLCM(unsigned char WCLCM, unsigned char BuysC)
{
if (BuysC) ReadStatusLCM(); //?ù?YDèòa?ì2a?|
IO0CLR=LCM_RS ;
IO0CLR=LCM_RW ;
IO0CLR=LCM_Data;
IO0SET=WCLCM;
Delay5Ms();
IO0CLR=LCM_E ;
Delay5Ms();
IO0SET=LCM_E ;
}

//?áêy?Y
unsigned char ReadDataLCM(void)
{
IO0SET=LCM_RS ;
IO0SET=LCM_RW ;
IO0CLR=LCM_E ;
Delay5Ms();
IO0SET=LCM_E ;
return(IO0SET&0XFF);
}

//?á×′ì?
unsigned char ReadStatusLCM(void)
{
IO0SET=LCM_Data;
IO0CLR=LCM_RS ;
IO0SET=LCM_RW ;
IO0CLR=LCM_E ;
Delay5Ms();
IO0SET|=LCM_E ;
return(IO0SET&0XFF);
}
//LCM3?ê??ˉ
void LCMInit(void)
{
IO0CLR=LCM_Data ;
WriteCommandLCM(0x38,0); //èy′???ê??￡ê?éè??￡?2??ì2a?|D?o?
WriteCommandLCM(0x38,0);
WriteCommandLCM(0x38,0);
WriteCommandLCM(0x38,1); //??ê??￡ê?éè??,?aê?òa?ó??′??ì2a?|D?o?
WriteCommandLCM(0x08,1); //1?±???ê?
WriteCommandLCM(0x01,1); //??ê????á
WriteCommandLCM(0x06,1); // ??ê?1a±êò??ˉéè??
WriteCommandLCM(0x0C,1); // ??ê??a?°1a±êéè??
}
//IO3?ê??ˉ
void IOInit(void)
{
PINSEL0=0X00000000;
IO0DIR=(LCM_Data|LCM_Data|LCM_RS|LCM_RW|LCM_E|LED) ;
IO0CLR=LED ;
}

//°′???¨??????ê?ò???×?·?
void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
{
Y&= 0x1;
X&= 0xF; //?T??X2??ü′óóú15￡?Y2??ü′óóú1
if(Y) X|=0x40;//μ±òa??ê?μú?tDDê±μ??·??+0x40;
X|= 0x80; //??3???á???
WriteCommandLCM(X, 0); //?aà?2??ì2a?|D?o?￡?·￠?íμ??·??
WriteDataLCM(DData);
}

//°′???¨??????ê?ò?′?×?·?
void DisplayListChar(unsigned char X, unsigned char Y, unsigned char  *DData)
{
unsigned char ListLength;
ListLength = 0;
Y&=0x1;
X&=0xF; //?T??X2??ü′óóú15￡?Y2??ü′óóú1
while (DData[ListLength]>0x20) //è?μ?′?×?′??2?òí?3?
{
if (X<= 0xF) //X×?±êó|D?óú0xF
{
DisplayOneChar(X, Y, DData[ListLength]); //??ê?μ￥??×?·?
ListLength++;
X++;
}
}
}

//5ms?óê±
void Delay5Ms(void)
{
unsigned int TempCyc = 5552;
while(TempCyc--);
}

//400ms?óê±
void Delay400Ms(void)
{
unsigned char TempCycA = 5;
unsigned int TempCycB;
while(TempCycA--)
{
TempCycB=7269;
while(TempCycB--);
}
}
/*********************************************************************************************************
**                            End Of File
********************************************************************************************************/