Hi everybody i got a little problem i'm triing to send a simple caracter
like 'U' with a 16C74A using the USART synchrone mode. An yes i got a
max 232 between Com1 and my PIC... But what is happening is that the PIC
is always sending the same caracter, it's a square. (0x255)... but i'm
really sending 0x55. Can somebody help me y really need to do this
simple thing.

Here is a look at my source in HighTech C compiler:

#include <pic.h>
#include <delay.c>

#define BaudRate 103  // 9600 = 4MHz / 4(X+1)

void initialise();

void main()
{
 initialise();
 TXREG = 36;
 while(1)
 {
  if(TRMT = 1)
  {
   DelayMs(250);
   TXREG = 36;
  }
 }
}

void initialise()
{
 GIE = 0;   /* Disable les interruptions */

 TRISA = 0x00;     // 0000 0000 porta en output
 TRISB = 0x00;     // 0000 0000 portb en output.
 TRISC = 0xC0;     // 1100 0000 portc en 7:6 TX/RX

 /* configuration du USART pour un master synchrone */
 SPBRG = BaudRate;
 TXSTA = 0x94;     // 1001 0100 ... Mode Master, USART synchrone,
// Baudrate synchrone
 RCSTA = 0x80;     // 1000 0000 ... Enable le Port serie
 TXIE = 0;         // Disable the USART transmit interrupt
 TXEN = 1;         // Enbable la transmission...

 GIE = 1;          // Enable les interruptions
}


Thanks for the help!!

Sylvain.
Val d'Or
Quebec

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