標(biāo)題:
51單片機(jī) 串口通信—數(shù)碼管實(shí)驗(yàn)
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作者:
lmafia
時(shí)間:
2017-5-23 10:43
標(biāo)題:
51單片機(jī) 串口通信—數(shù)碼管實(shí)驗(yàn)
#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit dula=P2^6;
sbit wela=P2^7;
sbit led=P1^1;
uchar flag,num;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
void delayms(uint xms) //延時(shí)函數(shù)
{
uint i,j;
for(i=xms;i>0;i--)
for(j=110;j>0;j--);
}
void display(uchar num) //數(shù)碼管顯示函數(shù)
{
uchar bai,shi,ge;
bai=num/100;
shi=num%100/10;
ge =num%10;
dula=1;
P0=table[bai];
dula=0;
P0=0xff;
wela=1;
P0=0x7e;
wela=0;
delayms(5);
dula=1;
P0=table[shi];
dula=0;
P0=0xff;
wela=1;
P0=0x7d;
wela=0;
delayms(5);
dula=1;
P0=table[ge];
dula=0;
P0=0xff;
wela=1;
P0=0x7b;
wela=0;
delayms(5);
}
void ser() interrupt 4 //串口中斷
{
RI = 0;
num = SBUF; //從串口緩沖區(qū)取得數(shù)據(jù)
flag=1;
}
void init()
{
SCON=0x50; //設(shè)定串口工作方式
PCON=0x00; //波特率不倍增
TMOD=0x20; //定時(shí)器1工作于8位自動(dòng)重載模式, 用于產(chǎn)生波特率
EA=1;
ES = 1; //允許串口中斷
TL1=0xfd;
TH1=0xfd; //波特率9600
TR1=1;
}
void main()
{
led=0;
wela=1;
P0=0x7f;
wela=0;
init();
while(1)
{
display(num) ;
if(flag==1) //標(biāo)志判斷
{
SBUF=num;
while(!TI);
TI=0;
flag=0; //標(biāo)志清除
}
}
}
復(fù)制代碼
全部資料下載地址:
串口實(shí)驗(yàn).zip
(21.88 KB, 下載次數(shù): 28)
2017-5-23 10:42 上傳
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