Serial comm with 8051

[Monu johar]

I want to represent data bits on port2 of 8051...and this same data is transmitted serially on rxd pin of uC by putty software on pc. I.e if i send byte "1" by putty software then this byte "1" should be represented on port 2 in terms of 8 bits on port 2 pins...can anyone provide me code. At 9600 boud rate.

 

[karthikec23]

hey try this..

#include<reg51.h>
#include<string.h>
char a;
void main()
{ 
TMOD=0x20;
TH1=0xFD;
SCON=0x50;
SBUF=' ';
TR1=1;
while(1)
{
while(RI==0);
a=SBUF;
P2=a;
}
}

 

[vinothksr08]

#include<reg51.h>
unsigned int rdata;

void recieve() interrupt 4  \\ interrupt for recive the data
{
if(RI==1)
{
rdata=SBUF;
RI=0;  
P2=rdata;
}

}

void main()
{
    TMOD=0x20;                         
    TH1=0XFD;
    SCON=0x50;
    TR1=1;
    EA=1;
    ES=1;                             
    delay(200);
    while(1)
    {
	SBUF='A';       \\ it will send data 'A' Serily & waiting for interrupt
        while(TI==0);    

    }
}

try this and update me.....in this am using interrupt for display received data...

 

[ark5230]

If you need code in assembly, drop a line,

 

[Monu johar]

This code is not working sir.
I have code as
org 0h
AJMP BEGIN
ORG 40h
BEGIN : MOV SCON,#01010000B
MOV TH1,#0FDH
MOV TMOD,#00100000B
MOV P2,#00H
MOV A,#00H
SETB TR1
START: JNB RI,START
MOV A, SBUF
MOV P2, A
CLR RI
AJMP START
END
this code is not working. Data is coming on rxd pin of port 3 .i checked by cro... All bits are coming correctly..

- - - Updated - - -

In starting there is not org 0h,
there is ORG 0.

- - - Updated - - -

Sir you have used
EA =1 AND
ES=1
. Why you used this i know this is ie register for intrpt . What if i do not use this in my programming for only receiving data. I have not clear cut about this.

 

[andre_luis]

Monu johar,


Instead of you try debug your code, why not take some posted examples here or on other topics of this forum ?

https://www.edaboard.com/threads/295655/#post1264416


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