51單片機串口通信中字符發(fā)送的總結(jié)

/*字符發(fā)送方式一*/

#includereg52.h>

#define uchar unsigned char

#define uint unsigned int

uchar flag,a,i;

uchar code table[]="I get ";

void init()

{

TMOD=0x20;

TH1=0xfd;

TL1=0xfd;

TR1=1;

SM0=0;

SM1=1;

REN=1;

//TI=1;

EA=1;

ES=1;

}

void main()

{

init();

while(1)

{

if(flag==1)

{

ES=0;

for(i=0;i6;i++)

{

SBUF=table[i];

while(TI==0);

TI=0;

}

SBUF=a;

while(TI==0);

TI=0;

ES=1;

flag=0;

}

}

}

void ser() interrupt 4

{

a=SBUF;

RI=0;

P1=~P1;

flag=1;

}

/*字符發(fā)送方式二*/

#includereg52.h>

#includestdio.h>

#includeintrins.h>

#define uchar unsigned char

#define uint unsigned int

uchar flag,a,i=0;

uchar code table[]="I get ";

void init()

{

TMOD=0x20;

TH1=0xfd;

TL1=0xfd;

TR1=1;

SM0=0;

SM1=1;

REN=1;

//TI=1;

EA=1;

ES=1;

}

void main()

{

init();

while(1)

{

if(flag==1)

{

ES=0;

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