UART Issue with PICDEM PlUS 2 board

[Neyolight]

Hi Everyone

I have a PICDEM 2 Plus board with a PIC18F4620 on it. My UART code is given. The code worked perfectly fine the first time i programmed my chip but stopped working after that.

With Hyperterminal the error is : "Unable to open COMPORT 1. Please check your port setting"

With RealTer , the error is : Break condition received

With Putty : Nothing happens

I performed a loopback test on the board ( by taking our the PIC ) and Serial-to USAB adaptor and both works fine. The comport on my laptop works fine with other UART. Please guide me..I AM SUPER LOST !

Heres the code



#include <p18f4620.h>
#include <stdio.h>
#include <delays.h>
#include <usart.h>

// INTIO67 configures internal oscillator
#pragma config OSC=INTIO67, LVP=OFF, MCLRE=ON , WDT=OFF

void setup(void)
{
/* Clock Setup*/
OSCCON = 0b01110010; //select 8 MHz clock

/* Port Set Up*/
ADCON1 = 0b00001111; //set all pins to digital mode
TRISD = 0x00;
TRISA = 0x00;
TRISB = 0b00000000;
TRISC = 0b10000000; // RX is an input, TX is output

// PORTBbits.RB0=1; //Turn on the 4 LEDs
// PORTBbits.RB1=1;
// PORTBbits.RB2=1;
// PORTBbits.RB3=1;

// Turn on the 4 LEDs
// Microchip recommends writing to the PORT Latch rather than the PORT Pins
LATBbits.LATB0=1;
LATBbits.LATB1=1;
LATBbits.LATB2=1;
LATBbits.LATB3=1;


/* Interrupt Setup */
INTCON = 0x00; /* Clear Registers */
PIR1 = 0x00;
PIE1 = 0x00;
TMR1L = 0x00;
TMR1H = 0x00;
T1CON = 0x00;
RCON = 0x00;



/* RS232 Enable */
// OpenUSART Configures The Next Three Lines
//RCSTA = 0b10000000;
//TXSTA = 0b00100000;
//BAUDCON = 0b01000000;

// USART 9600 8-N-1
OpenUSART (USART_TX_INT_OFF & USART_RX_INT_OFF & USART_ASYNCH_MODE & USART_EIGHT_BIT & USART_CONT_RX & USART_BRGH_LOW, 12);

}


#pragma code
void main(void)
{
setup();

while (1)
{
putrsUSART(" Hello World! ");
// while(BusyUSART());
Delay10KTCYx(100);

}
}

 

[anorlunda]

If it worked once, then won't work again, I presume there must be some kind of hardware fault, or that you changed the state of the device.

Have you tried power off/on reset?