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USART baud rate error

 
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DimpleB



Joined: 02 May 2011
Posts: 1

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USART baud rate error
PostPosted: Mon May 02, 2011 1:18 pm     Reply with quote
hi
I am using PIC18F2525 USART to send a character and string via Rs232 to Hyperterminal....I am using a 4MHz crystal oscillator, i am able to display the characters on the screen only at 250000 baud rate with every character repeating itself

meaning
my Output needs to be
D
dimple
bhuta

my current output is
DDddiimmppllee
bbhhuuttaa

I have included my code, any advice would be very appreciated
Thank you
Code:

#include <p18f2525.h>
#include <usart.h>
 #include <string.h>

#pragma config OSC= XT
#pragma config WDT = OFF
#pragma config MCLRE = ON
#pragma config LVP = OFF
#pragma config BOREN = ON

void USART_setup (void)
{
TXSTAbits.SYNC =0;
SPBRG = 0x00;
TXSTAbits.BRGH =1;
RCSTAbits.SPEN =1;
PIE1bits.TXIE =0;
TXSTAbits.TX9 =0;
TXSTAbits.TXEN =1;
}

void putc(unsigned char ch)
{
while (PIR1bits.TXIF != 0)
TXREG =ch ;
}

void puts(far rom char *Str )
{
do
 {
 unsigned char c;
 c = *Str;
 putc (c);
if (*Str==13) putc (10);
if (*Str == 10) putc(13);
Str++;
 } while ((*Str) != 0 );
}
void main (void)
{
TRISC =0b10000000;
USART_setup ();
while(1)
{
putc('D');
puts ("dimple\n");
puts("bhutadc\n");
}
}
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon May 02, 2011 1:26 pm     Reply with quote
You're using the Microchip C18 compiler, but you're posting on the CCS
compiler forum. They're not compatible. Here is the C18 forum:
http://www.microchip.com/forums/f3.aspx
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