factory.c

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/* -*-C-*-
 *
 * $Revision: 1.3 $
 *   $Author: mechavar $
 *     $Date: 2000/05/01 19:37:08 $
 *
 * Copyright (c) 2000 ARM, INC.
 * All Rights Reserved.
 *
 *   Project: BootStrap Loader
 *
 *   
 */

#include "uhal.h"

#define RX_DONE(p)	(RX_DATA(GET_STATUS(p)))
#define RESP_DELAY	(10 * 1000)	/* approximately how many loops to
					   test for receive ready, for 9600
					   baud */


unsigned wait_forRX( unsigned port )
{
   int i = RESP_DELAY;

   while ( i-- > 0 )
   {
      if ( 0 != RX_DONE(port) )
      {
	 return( GET_CHAR(port) );
      }
   }
   return( 0xFEEDBEEF );
}

/* Check that a loop back cable connects com0 to com1. This constitutes the
   UART testing. If the loopback cable is detected, return TRUE. */

int bsl_FactoryTestRequired( void )
{
   unsigned ret;

   while ( 0 == (GET_STATUS(UART0_BASE) & USRTxEmpty) )
   {
      ;
   }
   PUT_CHAR( UART0_BASE, 0x1F );

   ret = wait_forRX( UART1_BASE );
   if ( ret != 0x1F )
   {
      return( FALSE );
   }

   while ( 0 == (GET_STATUS(UART1_BASE) & USRTxEmpty) )
   {
      ;
   }
   PUT_CHAR( UART1_BASE, 0x1E );

   ret = wait_forRX( UART0_BASE );
   if ( ret != 0x1E )
   {
      return( FALSE );
   }

   return( TRUE );

}

/* First check the SRAM and the flash integrity. Then set up to respond to the
   user interrupt switch. This function will not return. */

void bsl_DoFactoryTest( void )
{

   dispMode( 2 );		/* set the 7 segment display */
   ScanModules( 0 );
   BootModules( 2 );		/* special do-factory-test flag */
}