/************************************************************************/
/*	TALKTHRU.C         Written by: Jerry Lenaz,  12/21/92           */
/*                         Revised by: Matt Begg,    1/5/93             */
/************************************************************************/
/*      This is a talkthru program written entirely in C to be used     */
/*      with the ADSP-21020 EZ-LAB board.                               */
/*                                                                      */
/*	This talkthru program defines the port addressses for the	*/
/*	particular input and output channel being used, sets up the	*/
/*	IRQ3 interrrupt to call the talkthru routine, and sets up	*/
/*	an idle wait loop to conserve power while waiting for the	*/
/*	interrupt.							*/
/************************************************************************/
#include <21020.h>    /* For the idle() command */
#include <signal.h>   /* For the interrupt command */
#include <macros.h>   /* For the segment function */


volatile int in_port segment(hip_reg0); /* hip_reg0 and hip_reg2 are  */
volatile int out_port segment(hip_reg2);/* used in architecture file  */

void process_input(int);

void main(void)
{ 
  interrupt(SIG_IRQ3, process_input);

  while (1)
  {  
    idle();
  }
}

void process_input(int sig_number)
{
  out_port = in_port;
}