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標題: 利用24c02存儲數字達到斷電保護LCD1602顯示程序問題 [打印本頁]

作者: jinguanglong 時間: 2019-12-24 22:03
標題: 利用24c02存儲數字達到斷電保護LCD1602顯示程序問題
1602斷電后再送電不能實現，請各位大佬幫忙指點一下小弟，錯在哪里？

#include<reg52.h> //頭文件
#include<intrins.h>  //頭文件
#define uchar unsigned char //宏定義
#define uint  unsigned int  //宏定義
uchar code table[]="I LOVE DIANZI"; //定義編碼
uchar code table1[]=" ABCD    ";  //定義編碼
uchar code table2[]="DIANZI LOVE I"; //定義編碼
uchar code table3[]="    DCBA ";  //定義編碼
uchar num,sec,sce,tcnt;
sbit key1 = P3^0;    //按鍵一
sbit key2 = P3^1;    //按鍵二
sbit key3 = P3^2;    //按鍵三
sbit key4 = P3^3;    //按鍵四
/* sbit key5 = P3^4;
sbit key6 = P3^5;
sbit key7 = P3^6;
sbit key8 = P3^7;*/
sbit sda = P2^0;    //24c02數據
sbit scl = P2^1;    //24c02時鐘
bit write = 0;    //寫24c02的標志
/*sbit led1 = P0^0;
sbit led2 = P0^1;
sbit led3 = P0^2;
sbit led4 = P0^3; */
sbit lcdrs = P2^6;    //1602數據/命令
sbit lcdwr = P2^5;    //1602寫/讀
sbit lcden = P2^7;    //1602使能
void delay1s(uint z) //延時
{
  uint x,y;
  for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void delay()    //延時
{;;}
void at_start() //24c02開始
{
sda = 1;
delay();
scl = 1;
delay();
sda = 0;
delay();
}
void at_stop()    //24c02結束
{
sda = 0;
delay();
scl = 1;
delay();
sda = 1;
delay();
}
void at_respons()    //24c02應答
{
uchar i;
scl = 1;
delay();
while((sda==1)&&(i<255))i++;
scl = 0;
delay();
}
void at_init() //24c02初始化
{
sda = 1;
delay();
scl = 1;
delay();
}
void at_write_byte(uchar date) //24c02寫一個字節
{
uchar i,temp;
temp =date;
for(i=0;i<8;i++)
{
  temp=temp<<1;
  scl = 1;
  delay();
  sda = CY;
  delay();
  scl = 1;
  delay();
}
scl = 0;
delay();
sda = 1;
delay();
}
uchar at_read_byte()    //24c02讀一個字節
{
uchar i,k;
scl = 0;
delay();
sda = 1;
delay();
for(i=0;i<8;i++)
{
  scl = 1;
  delay();
  k = (k<<1)|sda;
  scl = 0;
  delay();
  }
  return k;
}
void at_write_add(uchar address,uchar date) //24c02任意地址寫字節
{
at_start();
at_write_byte(0xa0);
at_respons();
at_write_byte(address);
at_respons();
at_write_byte(date);
at_respons();
at_stop();
delay1s(5);
}
uchar at_read_add(uchar address)    //24c02任意地址讀字節
{
uchar date;
at_start();
at_write_byte(0xa0);
at_respons();
at_write_byte(address);
at_respons();
at_start();
at_write_byte(0xa1);
at_respons();
date=at_read_byte();
at_stop();
delay1s(5);
return date;
}
bit lcd_busy()    //1602忙標志
{
  bit result;
  lcdrs = 0;
  lcdwr = 1;
  lcden = 1;
  delay();
  delay();
  delay();
  result=(bit)(P0&0x80);
  lcden = 0;
  return(result);
  }
void lcd_send_com(uchar com)    //1602命令
{
  while(lcd_busy());
  lcdrs = 0;
  lcdwr = 0;
  P0 = com;
  delay1s(5);
  lcden = 1;
  delay1s(5);
  lcden = 0;
  }
void lcd_send_data(uchar date)    //1602寫數據
{
  while(lcd_busy());
  lcdrs = 1;
  lcdwr = 0;
  P0 = date;
  delay1s(5);
  lcden=1;
  delay1s(5);
  lcden=0;

  }
void lcd_init() //1602初始化
{
lcden = 0;
lcdrs = 0;
lcdwr = 0;
lcd_send_com(0x38);
lcd_send_com(0x0c);
lcd_send_com(0x06);
lcd_send_com(0x01);
}
uchar keyscan() //鍵查詢
{

  if(key1==0)
  {
delay1s(5);
if(key1==0)
{
return 1;
  /* lcd_send_com(0x80);
for(num = 0;num<13;num++)
   {
   lcd_send_data(table[num]);
   delay1s(5);
  }*/
}
while(!key1);

  }

else if(key2==0)
{
   delay1s(5);
   if(key2==0)
{
return 2;

  }
while(!key2);


}

  else if(key3==0)
  {
delay1s(5);
if(key3==0)
{
return 3;

}
while(!key3);

}

else if(key4==0)
{
   delay1s(5);
   if(key4==0)
{
   return 4;

  }
while(!key4);

}
return 0;
}
void displaychar(uchar n) //1602顯示
{
switch(n)
{
case  1:
  lcd_send_com(0x80);
for(num = 0;num<13;num++)
   {
   lcd_send_data(table[num]);
   delay1s(5);
  } break;
  case 2:
   lcd_send_com(0x80+40);
   for(num = 0;num<11;num++)
   {
   lcd_send_data(table1[num]);
   delay1s(5);
  } break;
  case 3:
   lcd_send_com(0x80);
   for(num = 0;num<11;num++)
   {
   lcd_send_data(table2[num]);
   delay1s(5);
  } break;
  case  4:
  lcd_send_com(0x80+40);
for(num = 0;num<11;num++)
   {
   lcd_send_data(table3[num]);
   delay1s(5);
  }  break;
  default: break;
}
}
void main() //主程序
{
at_init();
lcd_init();
sec=at_read_add(23); //將24c02讀數據賦值給sec

lcd_send_com(0x80);    //指針位置

   lcd_send_data(sec); //1602寫數據

while(1)
{
displaychar(keyscan());    //1602顯示內容
sec= keyscan();       //將按鍵返回值賦值給sec
at_write_add(23,sec);delay1s(5); //將在24c02存儲器23位存儲數據sec的值
}
}

作者: zhy123654 時間: 2019-12-25 17:36
先問下你的板子有沒有這個功能

作者: jinguanglong 時間: 2019-12-27 20:27
板子上有24c02.按照調試程序可以用電腦讀24c02中寫入字符

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