Problem with EUSART on PIC18F4520.

Hi folks.

I am trying to communicate from a PIC18F4520 to another PIC18F4520, however for the time being I am just trying to transmit data out of one PIC to an oscilloscope, just to ensure that I am actually transmitting which it appears I'm not.

I have to configuration bits on the PIC set up in the PIC menu, and am using a 10MHz crystal on a PICDEM2 board.

All I want to do is transmit a series of 1s and 0s which is why 0xAA is being fed into TXREG.

I have the oscilloscope triggering set up so that I would be able to see a change on the screen but nothing is happening when I load data into the TXREG.

If anyone can see anything wrong with my code it would be much appreciated.


Pete

Check the configuration bit you need to set again. Most likely some bits are missing.

---------- Post added at 11:48 ---------- Previous post was at 11:46 ----------

This is sample of UART for PIC18F2550:

//#define USE_OR_MASKS
#include <P18f2550.h>
#include <usart.h>
//-------------------------------Configuration setting ----------------------------------------------

unsigned char Rxdata[25];
unsigned char Txdata[] = "MICROCHIP_USART";

// BAUD_RATE_GEN is calculated as = [Fosc / (64 * Desired Baudrate)] - 1
// It needs to be changed depending upon oscillator frequency.
// 8MHz / (64 * 2400) - 1 = 51 (approx.)
#define BAUD_RATE_GEN 51 // Fosc = 8MHz, Baud Rate = 2400 bps

void main(void)
{
//-------------------------configure USART ---------------------------------------------------------
// API configures USART for desired parameters:
// - TX/RX interrupts turned off
// - Asynchronous mode
// - 8 bits
// - Continuous Receive Enabled
// - Low speed baud rate generator mode (Fosc / 16)
OpenUSART(USART_TX_INT_OFF | USART_RX_INT_OFF | USART_ASYNCH_MODE | USART_EIGHT_BIT | USART_CONT_RX | USART_BRGH_LOW, BAUD_RATE_GEN);
//baudUSART(BAUD_8_BIT_RATE | BAUD_AUTO_OFF);


//------------USART Transmission ----------------------------------------------------------------
putsUSART((char *)Txdata); // transmit the string

//-----------USART Reception ---------------------------------------------------------------------
getsUSART((char *)Rxdata, 24); // receive data up to 24 bytes
Rxdata[24] = 0; // NULL terminate the string for putsUSART call.
putsUSART((char *)Rxdata); // echo back the data recieved back to host

CloseUSART();
while(1); // end of program
}