Paul's working vex usart i/o

firmware.c

#include <OpenVex.h>
#include "firmware.h"
#include "interrupts.h"

void resetHeartBeat(void);
unsigned char usartDataReady(void);
int usartGetChar(char * c);

unsigned char c = 0;

void    main(void)
{
    controller_init();

    //controller_in_autonomous_mode();// see Lib/master.c
    controller_begin_autonomous_mode();

    usart_init();

    printf("\n\"Hello, world!\"\n\t - Rex the Vex\n\n");
    
    while (TRUE)
    {
        // If there is a character to get...
        if (usartGetChar(&c))
        {
            // we're in!
            printf("\nif (usartGetChar(&c))");
            // print the character that was received
            usart_putc(c);
        }

        controller_submit_data(NO_WAIT);

    }// end while

}// end main

// this is not actually used...
void resetHeartBeat(void)
{
    return;
}

unsigned char usartDataReady(void)
{
    // will return 0 or 1
    return PIR1bits.RCIF;
}

int usartGetChar(char * c)
{
    // if data is ready, newdata will be 1
    unsigned char newdata = usartDataReady();
    // Debugging:
    //printf("\nIN USARTGETCHAR!");
    if (newdata)
    {
        // put the value of the register into c
        *c = RCREG1;
        printf("\nif: %c",(char)RCREG1);
        //printf("\nor: %c",(char)rxbyte);
        return 1;
    }
    // fail:
    return 0;
}