简单51单片机串口程序 51单片机串口通信程序
51\u5355\u7247\u673a \u7b80\u5355\u7684\u4e32\u53e3\u7a0b\u5e8f \u9898\u76ee\u5982\u4e0b\u7528\u4e32\u53e3\u52a9\u624b\u5f80\u4e32\u53e3\u53d1\u6570\u636e\uff0c\u8981\u752816\u8fdb\u5236\u53d1\u9001\uff0c\u4e0d\u8981\u7528\u6587\u672c\u65b9\u5f0f
\u7a0b\u5e8f\u4e0d\u6b63\u786e\uff0c\u4f60\u8fd9\u4e2a\u7a0b\u5e8f\u7684\u7ed3\u679c\uff0c\u5e94\u8be5\u662f\u7535\u8111\u4e0a\u53d1\u4e00\u6b21''1"\uff0c\u540e\u6c38\u8fdc SBUF=='1' \uff0c\u6240\u6709\u5728\u91cd\u590d
\u4eae \u4e0e \u706d\uff0c\u56e0\u4e3a\u65f6\u95f4\u5f88\u5feb\uff0c\u4eba\u773c\u775b\u53cd\u5e94\u4e0d\u8fc7\u6765\uff0c\u6240\u4ee5 \u4e00\u76f4\u662f \u4eae \u7684\uff0c
\u7b80\u5355\u7684 \u4f60 \u53ef\u4ee5\u6539\u53d8 \u4e00\u79cd\u65b9\u5f0f \u8bd5\u8bd5\uff0c \u53d1''1" \u4eae\uff0c \u53d1''0" \u706d\uff0c
\u53bb\u6389 if(cont==0)\uff0cif(cont==1) \u7b49\u7b49\u3002
#include<reg51.h>
#define uchar unsigned char
uchar txt[] = "hello";
uchar i = 0;
void main(void)
{
PCON = 0X00;
SCON = 0X50;
TMOD = 0X20;
TH1 = 0XFD;
TL1 = 0XFD;
TR1 = 1;
EA = 1;
ES = 1;
TI = 1;
while(1) {
if(i == 6) {
i = 0;
TI = 1;
}
}
}
void uart() interrupt 4
{
if(RI == 1) RI = 0;
if(TI == 1) {SBUF = txt[i++]; TI = 0;}
}
本程序，可以用串口助手接收。收到的是：hellohellohellohellohello....
#include<reg51.h>#define uchar unsigned char
uchar txt[]="hello";
uchar i=0;
void main(void)
{
PCON=0X00;
SCON=0X50;
TMOD=0X20;
TH1=0XFD;
TL1=0XFD;
EA=1;
ES=1;
TR1=1;
SBUF=txt[0];
while(1)
{
}
}
void uart() interrupt 4
{
if(RI==1)
RI=0;
if(i==6)
{
i=0;
return;
}
if(TI==1)
{
TI=0;
SBUF=txt[i++];
}
}
另外，波特率多少，晶振频率多少？
发送的话用查询方式就好了，稍微改一下：
...
while(1) {
if(i==6)
i=0;
while(!TI);
TI = 0;
SBUF = txt[i++];
}
}
波特率没设置好
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