please check my program code (serial communication)

serial communication

hey guys plz help me out.....here i have done program for serial transmition..i am using keil compiler...my problem is i can not see string"ATKT" in the serial window.i am sending it char by char using putchar ....whai is wrong inthis??plz help..........





#include<stdio.h>
#include <REG51.H>

void send(unsigned char []);
void delay();
void serialint(void);

unsigned char prati[]="ATKT";

void main()
{

serialint();
while(1)
{

send(prati);
delay();
}
}



void serialint(void)
{

SCON = 0x50; /* SCON: mode 1, 8-bit UART, enable rcvr */
TMOD |= 0x21; /* TMOD: timer 1, mode 2, 8-bit reload */
TH1 = 0xf3; /* TH1: reload value for 2400 baud */
TR1 = 1; /* TR1: timer 1 run */
TI = 1;


}

void delay(void)
{

TH0=0XEE;
TL0=0XE0;
TR0=1;
while(!TF0);
TF0=0;


}



void send(unsigned char *p)
{
int val=0;
while(*p!='\n')
{
val=*p;
putchar(val);
delay();
p++;



}


}

Re: serial communication

Try this code.....


#include"reg51f.h"

void DelayMs(unsigned int period)
{
unsigned int i,j,k=0;
period<<=1;
for(i=0;i<period;i++)
{
for(j=0;j<0x14;j++)
{
k++;
}
}
}
void init_serial()
{
TMOD = 0x20;
TH1 = 0xFD; // For 9600 Baud Rate
SCON = 0x50;
TR1 = 1;
}
void send_char(unsigned char ch)
{
SBUF = ch;
while( !TI );
TI = 0;
}
void send(unsigned char *temp)
{
while(*temp)
{
send_char(*temp);
DelayMs(10);
temp++ ;
}
}
void main()
{
init_serial();
send("HELLO WORLD") ;
while(1);
}

-----

If you want to use serial communication with serial Interrupt





---
Gurpreet Singh
www.embeddedcraft.org

serial communication

thnx for ur reply....but tell me what is wrong in my code?in my code i want to use putchar to see its working.....so can anybody tel me what is wrong?can anybody modify my code???



come on!! plz tel me......

serial communication

help!help!help!!

Re: serial communication

I tested your program on Keil and found it working fine. I do see the ATKT for the first four characters.

serial communication

thnx a lot....really its workin????but i cant see anything ......what will be the reason??

what serial window you were looking at.

I used the generic simulator for 8052 in Keil and the serial 1 window.

I do see ATKT and then some non-displayable characters values. I think your string is not properly null terminated.

Re: serial communication

katsmiley said:

void send(unsigned char []);

void send(unsigned char *p)

Click to expand...

I think this is the mistake..
initially you have declared the parameter as unsigned char and then as a pointer.
IMO it should be

void send(unsigned char *p);

........

void send(unsigned char *p)
{
//your code;
}