Pic to Pic communication

[I007]

Hi. I need to send 5 bits of data from one 18f4431 pic to another 18f4431. I am using PICKit2 and C18 compiler. I have connected the TX of the sending pic to the RX of the receiver pic. No resistor in between? Is that good?

My code looks like this:

Sender:

#include <p18F4431.h>
#include <delays.h>
#include <usart.h>


void main()
{
TRISC = 0x00;
OSCCON = 0xf0;

OpenUSART(USART_TX_INT_OFF & USART_RX_INT_OFF &
USART_ASYNCH_MODE & USART_EIGHT_BIT &
USART_CONT_RX & USART_BRGH_LOW, 12); //baud rate 9600 1.36% error

while(1)
{
WriteUSART(PORTB); //some random value
}

}







And receiver:

#include <p18F4431.h>
#include <delays.h>
#include <usart.h>


void main()
{

unsigned char c;
TRISC = 0xff;
OSCCON = 0xf0;

OpenUSART(USART_TX_INT_OFF & USART_RX_INT_OFF
& USART_ASYNCH_MODE & USART_EIGHT_BIT &
USART_CONT_RX & USART_BRGH_LOW, 12);

while(1)
{
while (!DataRdyUSART())
c = ReadUSART();
PORTB = c;
}
}

But if i switch 5V to PortB of the sender I do not get any output from PortB on my receiver. The mclr is connected to Vdd with a resistor on both and Vdd and Vss are connected. Can anyone tell me what is wrong? Guess it's my code? Thanks

 

[Pommie]

I would guess that you need a config line.

Mike.