12864串行+键盘

只看该作者 · 2014-5-7 09:31

写了一段12864串行+键盘的代码，目的是实现第一行显示：PLEASE INPUT:.........然后第二行根据按键依次显示数字...........然后结果第一行显示出来了，按键只出来乱码，不知道是我的液晶屏幕坏了（摔过......），或者是我的键盘扫描程序错了，恳请朋友们的指点。

只看该作者 · 2014-5-7 09:32

#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
sbit CS=P3^5;
sbit SID=P3^6;
sbit SCLK=P3^4;
sbit LCD_PSB=P3^7;
sbit wela=P2^6;
sbit dula=P2^7;
uchar code dis2[]={"PLEASE INPUT:"};
uchar code table[]={0,1,2,3,4,5,6,7,8,9};
uchar i;
void delay(uint x)
{
uint i,j;
for(j=0;j<x;j++)
  for(i=0;i<110;i++);
}
void sendbyte(uchar byte)
{
uchar i;
for(i=0;i<8;i++)
{
  SCLK=0;
  byte=byte<<1;
  SID=CY;
  SCLK=1;
  SCLK=0;
}
}
void write_cmd(uchar cmd)
{
CS=1;
sendbyte(0xf8);
sendbyte(0xf0&cmd);
sendbyte(cmd<<4&0xf0);
CS=0;
}
void write_dat(uchar dat)
{
CS=1;
sendbyte(0xfa);
sendbyte(0xf0&dat);
sendbyte(dat<<4&0xf0);
CS=0;
}
void init()
{
LCD_PSB=0;
write_cmd(0x30);
delay(10);
write_cmd(0x0e);
delay(10);
write_cmd(0x01);
delay(10);
}
void keyscan()
{
uchar tempt,key,num;
P3=0xfd;
tempt=P3;
tempt=tempt&0xf0;
if(tempt!=0xf0)
{
  delay(10);
  tempt=P3;
  tempt=tempt&0xf0;
  if(tempt!=0xf0)
  {
tempt=P3;
switch(tempt)
{
case 0xed:
         key=0;
      num=0;
               break;
      case 0xdd:
         key=1;
      num=1;
               break;
case 0xbd:
         key=2;
      num=2;
               break;
      case 0x7d:
         key=3;
      num=3;
               break;
}
while(tempt!=0xf0)
{
tempt=P3;
      tempt=tempt&0xf0;
}
if(key==0||key==1||key==2||key==3)
{
write_dat(table[key]+0x30);
      delay(5);
}
  }
}
P3=0xfb;
tempt=P3;
tempt=tempt&0xf0;
if(tempt!=0xf0)
{
  delay(10);
  tempt=P3;
  tempt=tempt&0xf0;
  if(tempt!=0xf0)
  {
tempt=P3;
switch(tempt)
{
case 0xeb:
         key=4;
      num=4;
               break;
      case 0xdb:
         key=5;
      num=5;
               break;
case 0xbb:
         key=6;
      num=6;
               break;
      case 0x7b:
         key=7;
      num=7;
               break;
}
while(tempt!=0xf0)
{
tempt=P3;
      tempt=tempt&0xf0;
}
  if(key==4||key==5||key==6||key==7)
  {
write_dat(table[key]+0x30);
delay(5);
  }
  }
}
P3=0xf7;
tempt=P3;
tempt=tempt&0xf0;
if(tempt!=0xf0)
{
  delay(10);
  tempt=P3;
  tempt=tempt&0xf0;
  if(tempt!=0xf0)
  {
tempt=P3;
switch(tempt)
{
case 0xe7:
         key=8;
      num=8;
               break;
      case 0xd7:
         key=9;
      num=9;
               break;
case 0xb7:
         key=10;
               break;
      case 0x77:
         key=11;
               break;
}
while(tempt!=0xf0)
{
tempt=P3;
      tempt=tempt&0xf0;
}
  if(key==8)
  {
write_dat(table[key]+0x30);
      delay(5);
  }
  if(key==9)
  {
write_dat(table[0]+0x30);
delay(5);
write_dat(table[9]+0x30);
delay(5);
  }
  if(key==11)
  {
init();
write_cmd(0x80);
i=0;
while(dis2[i]!='\0')
{
  write_dat(dis2[i]);
  i++;
}

write_cmd(0x90);
  }
  }
}
}
void main()
{
wela=0;
dula=0;
delay(10);
init();
write_cmd(0x80);
i=0;
while(dis2[i]!='\0')
{
  write_dat(dis2[i]);
  i++;
}
delay(10);
write_cmd(0x90);
while(1)
{
  keyscan();
}
}

12864串行+键盘

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