大侠们指点下

只看该作者 · 2008-10-30 14:42

        我用lpc2114驱动lcd1602，程序如下，烧进单片机后，lcd1602无显示啊，大虾们帮我看下程序的错误所在，谢谢！！！！！！

#include "LPC21xx.h"
#include "string.h"

#define RS 0x00001000 //P0.12接RS
                      RW接地
#define E  0x00002000 //P0.13接E

void Delayms(unsigned int count)
{
unsigned int i;
for(i=0;i<count;i++);
}

void WriteCommand(unsigned char Com)
{
  IO0SET=(Com<<0x0000000F);
   IO0CLR=RS; IO0SET=E; IO0CLR=E;
  //IO0CLR=RW;
}

void WriteData(unsigned char Dat)
{
  IO0SET=(Dat<<0x0000000F);
   IO0CLR=RS; IO0SET=E; IO0CLR=E;
  //IO0CLR=RW;
}

void Init()
{
Delayms(1000);
WriteCommand(0x38);
Delayms(400);
WriteCommand(0x38);
Delayms(400);
WriteCommand(0x38);
Delayms(2800);
WriteCommand(0x38);
Delayms(2800);
WriteCommand(0x08);
Delayms(2800);
WriteCommand(0x01);
Delayms(2800);
WriteCommand(0x06);
Delayms(2800);
WriteCommand(0x0C);
}

void Show_Text(char *Text,char row)
{
unsigned char i;
if(row==0)
{
  WriteCommand(0x80);
  Delayms(2800);
  for(i=0;i<strlen(Text);i++)
  {
   WriteData(Text);
   Delayms(2800);
  }
}
else
{
   WriteCommand(0xC0);
  Delayms(2800);
  for(i=0;i<strlen(Text);i++)
  {
   WriteData(Text);
   Delayms(2800);
  }
}
}

void main()
{char Text1[16]="NIOS II on DE2";
char Text2[16]="Nice to See You!";
        PINSEL0=0x00000000;
        IO0DIR =0xffffffff;

Init();
while(1)
{
  Show_Text(Text1,0);
  Show_Text(Text2,1);
}
}