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- # include<reg52.h>
- # define uint unsigned int
- # define uchar unsigned char
- sbit DATA=P3^2;
- sbit rs=P2^6; //1602引腳定義
- sbit rw=P2^5;
- sbit e=P2^7;
- uchar dat,num;
- uchar code table[]="0123456789ABCDEF";
- uchar code table1[]="Receive:"; //液晶固定部分顯示
- uchar code table2[]="Re_data:0x";
- void write_data (uchar dat); //1602寫數(shù)據(jù)
- void write_com (uchar com); //1602寫命令
- unsigned char pow(unsigned char n,unsigned char m); //n的m次方函數(shù)
- uchar receive(void); //接收處理函數(shù)
- void gd(); //液晶固定部分顯示
- void delay (uint xms) //1602延時
- {
- uint i,j;
- for (i = xms; i > 0; i--)
- for (j = 110; j > 0; j--);
- }
- void delay1(unsigned char t)//延時程序
- {
- unsigned char n;
- for(;t>0;t--)
- for(n=40;n>0;n--);
- }
- unsigned char pow(unsigned char n,unsigned char m)//n的m次方函數(shù)
- {
- unsigned char t,result=1;
- for(t=0;t<m;t++){result=n*result;}
- return result;
- }
- void init_1602()
- {
- e = 0; //1602初始化
- write_com (0x38);
- write_com (0x0c);
- write_com (0x06);
- write_com (0x01);
- gd();
- }
- /*1602液晶代碼部分 ------------------------------ */
- void write_com (uchar com) //寫命令
- {
- rs = 0;
- rw = 0;
- P0 = com;
- delay (5);
- e = 1;
- delay (5);
- e = 0;
- }
- void write_data (uchar dat) //寫數(shù)據(jù)
- {
- rs = 1;
- rw = 0;
- P0 = dat;
- delay (5);
- e = 1;
- delay (5);
- e = 0;
- }
- void gd() //液晶固定部分顯示
- {
- write_com(0x80);
- for(num=0;num<8;num++)
- {
- write_data(table1[num]);
- delay(5);
- }
- write_com(0x80+0x40);
- for(num=0;num<10;num++)
- {
- write_data(table2[num]);
- delay(5);
- }
- }
- uchar receive(void)//接收處理函數(shù)
- {
- unsigned char guid=0,result[12],i,key=0,res=0,t,time=0;
- while(1)//捕獲前導(dǎo)命令
- {
- while(DATA==1){t++;if(t>=90){delay1(100);return 0;}}//防止錯誤數(shù)據(jù)導(dǎo)致的死循環(huán)
- if(t>=60&&t<95){t=0;key++;time=0;if(key>3)break;}//獲得前導(dǎo)命令跳出循環(huán),清除計(jì)時信號
- else if(time>100){delay1(100);return 0;}//長0，錯誤信號返回0
- else {t=0;time++;}//計(jì)時壘加，清除t
- }
- t=0;
- time=0;
- for(i=1;i<13;) //校驗(yàn)碼及數(shù)據(jù)的接收共12位數(shù)據(jù)
- {
- while(DATA==1){t++;if(t>=95){delay1(100);return 0;}}//防止錯誤信號導(dǎo)致的死循環(huán)
- if(t>=60&&t<95){t=0;i=1;time=0;}//去除多余的前導(dǎo)命令
- else if(t>=28&&t<60){result[i-1]=1;i++;time=0;}//捕獲數(shù)據(jù)1
- else if(t>0&&t<27){result[i-1]=0;i++;time=0;}//捕獲數(shù)據(jù)0
- if(time>100)return 0; //消除長0的干擾確保數(shù)據(jù)正確
- t=0; //清零
- time++;//計(jì)時
- }
- if(result[0]==1&&result[1]==0&&result[2]==1&&result[3]==0)//判斷校驗(yàn)碼
- for(i=0;i<8;i++){res+=pow(2,i)*result[11-i];}//將結(jié)果轉(zhuǎn)換為十進(jìn)制數(shù)據(jù)
- return res;//返回得到的結(jié)果
- }
-
- void display(uchar dat) //液晶數(shù)據(jù)顯示
- {
- uchar a,b;
- a=dat/16;
- b=dat%16;
- if(a>9)
- a=a+0;
- if(b>9)
- b=b+0;
- write_com(0x80+0x4A);
- write_data(table[a]);delay(5);
- write_data(table[b]);delay(5);
- }
- void main()
- {
- init_1602(); //1602初始化
- while(1)
- {
- dat=receive();
- if(dat) //顯示
- {
- write_com(0x80+0x08);
- write_data('O');delay(5);
- write_data('K');delay(5);
- write_data('!');delay(5);
- display(dat);
- }
- else
- {
- write_com(0x80+0x08);
- write_data('N');delay(5);
- write_data('O');delay(5);
- write_data('!');delay(5);
- write_com(0x80+0x4A);
- write_data(' ');delay(5);
- write_data(' ');delay(5);
- }
- }
- }
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