ARM7嵌入式LPC21XX系列

LCD1602显示字符

仿真：

代码：

#include"config.h"
#define rs (1<<8)
#define rw (1<<9)
#define en (1<<10)
#define busy (1<<7)
uint8 txt[]="HELLO EVERYONE"; //14
uint8 txt1[]="welcome to here";//15

void ChkBusy()
{
 IODIR=0x700;
 while(1)
 {
  IOCLR =rs;
  IOSET =rw;
  IOSET =en;
  if(!(IOPIN & busy))break;
  IOCLR =en;
 }
 IODIR =0x7ff;
}

void WrOp(uint8 dat)//写指令
{
 ChkBusy();
 IOCLR =rs;
 IOCLR =rw;
 IOCLR =0xff;
 IOSET =dat;
 IOSET =en;
 IOCLR =en;
}

void WrDat(uint8 dat)//写数据
{
 ChkBusy();
 IOSET =rs;
 IOCLR =rw;
 IOCLR =0xff;
 IOSET =dat;
 IOSET =en;
 IOCLR =en;
 }
void delay(uint32 dly)
{
 uint32 i;
 for(;dly>0;dly--)
 for(i=0;i<50000;i++);
}

void lcdinit()  //初始化
{
  
  WrOp(0x38);
   WrOp(0x06);
  WrOp(0x01);
  WrOp(0x0c);
}

int main()
{
 uint8 i;
 PINSEL0 =0x00000000;
 PINSEL1 =0x00000000;
 IODIR =0x7ff;
 IOCLR =0x7ff;
 
 lcdinit();

 
 WrOp(0x80+0x10);
 for(i=0;i<14;i++)
 {
  WrDat(txt[i]);
 }

  WrOp(0x80+0x50);
 for(i=0;i<15;i++)
 {
  WrDat(txt1[i]);
 }
 
  
  for(i=0;i<16;i++)
 {
  WrOp(0x1c);
  delay(5);
 }

 while(1);
 return 0;
}

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