EUSART not working properly

[mikesmixes]

Hi,

I am trying to configure the EUSART in a PIC18F2620....

See attached code.

The problem is that I recieve the correct characters but also the incorrect characters...
like happy faces and W's and > when all I should be receiving is T's.

Even when writing a String, there were incorrect characters withing the String.

Thanks.
Mike

//Library includes
#include <p18f2620.h>
#include <usart.h>

//My includes
#include "Main.h"

#pragma config OSC = HS //Oscilator = High Speed
#pragma config WDT = OFF //Watch Dog timer = ON
#pragma config PWRT = OFF //Power up timer OFF
#pragma config LVP = OFF //Low Voltage Programming = OFF


void InitializeBoard()
{
	TRISCbits.TRISC1 = 0; //LED to show button pressed
}

void ConfigureUSART()
{
	// configure USART Fosc=25Mhz, BR=19200, 8bits,
	OpenUSART( USART_TX_INT_OFF &
	USART_RX_INT_OFF &
	USART_ASYNCH_MODE &
	USART_EIGHT_BIT &
	USART_CONT_RX &
	USART_BRGH_HIGH,
	80 );

	//Enhanced USART Configuration
	baudUSART (BAUD_IDLE_CLK_LOW &
	BAUD_8_BIT_RATE &
	BAUD_WAKEUP_ON &
	BAUD_AUTO_OFF);
}

void main(void)
{
	int busy = 0; //USART Busy
	int buttonState = 0; //Last button state to detect falling edge
	int send = 0; //Send request

	InitializeBoard();
	ConfigureUSART();

	while(1)
	{
		PORTCbits.RC1 = !PORTBbits.RB5; //Set state of LED

		if( PORTBbits.RB5 < buttonState ) //Detect falling edge
		{
			send = 1;	
		}

		busy = BusyUSART();
		if(!BusyUSART() && send ) //Send required and USART available
		{
//			putrsUSART( "Test String, button pressed\n" );
			WriteUSART('T'); //Send just one char
			send = 0; //reset send request
		}

		buttonState = PORTBbits.RB5; //Set last state of button
	}
}

 

[LTX71CM]

Have you double checked the baud rate being used at both ends? Do they match? Is this on a breadboard? Have you checked for loose connections?

 

[mikesmixes]

Yes, I have double checked the baud rate both ends. I am using a pcb based around Jorge's EIP-10 Ethernet board.
Does the configuration seem correct? I have checked it, but maybe I'm missing something.

Thanks.

 

[Wilksey]

Apart from the comment that the WDT should be on but set to off, everything else looks ok.
80 is the correct setting for the baud rate generator, one thing I am not to familiar with is the EUSART baud settings, however, I am aware of this:
Inconsistencies in baudUSART()

It discusses some inconsitencies with the baudUSART function, may be worth a look.

Wilksey