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標題: 基于At89c52 的lcd顯示（菜鳥）作驗證 [打印本頁]

作者: jijsiejd 時間: 2018-4-27 17:33
標題: 基于At89c52 的lcd顯示（菜鳥）作驗證
#include <reg52.h>
#include<intrins.h>

sbit RS = P3 ^ 0;//?? H ?? L
sbit RW = P3 ^ 1;//? H ? L
sbit E  = P3 ^ 2;//??? H ??
#define DATA P2

void delayms(char ms);
char is_busy();
void write_cmd(unsigned char cmd);
void write_data(unsigned char dat);
void pos (unsigned char pos);

void main()
{

write_cmd(0x38);/
delayms(1);
write_cmd(0x0c)
delayms(1);
write_cmd(0x06)
delayms(1);
write_cmd(0x01)
delayms(1);

pos (0);
write_data('1');
write_data('2');
write_data('3');
write_data('4');
write_data('5');
write_data('6');
write_data('7');
write_data('8');
write_data('9');
write_data('0');

pos (0x40);

write_data('1');
write_data('2');
write_data('3');
write_data('4');
write_data('5');

while(1);
}

void pos (unsigned char pos)
{

write_cmd(pos|0x80);
}

void write_data(unsigned char dat)
{
while(is_busy());
RS = 1;
RW = 0;
E  = 0;
//_nop_();
DATA = dat;
_nop_();
E = 1
E = 0;
}

void write_cmd(unsigned char cmd)
{
while(is_busy());
RS = 0;
RW = 0;
E  = 0;
//_nop_();
DATA = cmd;
_nop_();
E = 1
E = 0;
}

char is_busy()
{
int a=0;
char result;
RS = 0
RW = 1;//?
//_nop_();
E  = 1;//??
_nop_();
result = (1<<7 & DATA)
E = 0;//????
return result;
}

void delayms(char ms)       //@12.000MHz
{
while(ms--)
{
      unsigned char i, j;
      i = 2;
      j = 239;
      do
      {
         while (--j);
      } while (--i);
}
}

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