Lpc2000

OK Guys,

I can confirm that the WD problem is solved in my case. Thanks a lot 
all!  (Description of solution below.)

I think this definitely should be mentioned in the err data sheets for 
the affected processors (or clearly in the UM)  as the resulting 
symptoms are such that the problem is very hard to debug..

Cheers
/Ake


How I solved it:

I have replaced all dog-feeds with

        mycpsr = disableIRQ();
        WDFEED = 0xAA; WDFEED = 0x55;
        restoreIRQ( mycpsr );

where disableIRQ and restoreIRQ is from R O Software

/******************************************************************************
 *
 * $RCSfile: armVIC.c,v $
 * $Revision: 1.1 $
 *
 * This module provides the interface routines for setting up and
 * controlling the various interrupt modes present on the ARM processor.
 * Copyright 2004, R O SoftWare
 * No guarantees, warrantees, or promises, implied or otherwise.
 * May be used for hobby or commercial purposes provided copyright
 * notice remains intact.
 *
 *****************************************************************************/
#include "types.h"
#include "armVIC.h"

#define IRQ_MASK 0x00000080
#define FIQ_MASK 0x00000040
#define INT_MASK (IRQ_MASK | FIQ_MASK)

static inline unsigned __get_cpsr(void)
{
  unsigned long retval;
  asm volatile (" mrs  %0, cpsr" : "=r" (retval) : /* no inputs */  );
  return retval;
}

static inline void __set_cpsr(unsigned val)
{
  asm volatile (" msr  cpsr, %0" : /* no outputs */ : "r" (val)  );
}

unsigned disableIRQ(void)
{
  unsigned _cpsr;

  _cpsr = __get_cpsr();
  __set_cpsr(_cpsr | IRQ_MASK);
  return _cpsr;
}

unsigned restoreIRQ(unsigned oldCPSR)
{
  unsigned _cpsr;

  _cpsr = __get_cpsr();
  __set_cpsr((_cpsr & ~IRQ_MASK) | (oldCPSR & IRQ_MASK));
  return _cpsr;
}

unsigned enableIRQ(void)
{
  unsigned _cpsr;

  _cpsr = __get_cpsr();
  __set_cpsr(_cpsr & ~IRQ_MASK);
  return _cpsr;
}

unsigned disableFIQ(void)
{
  unsigned _cpsr;

  _cpsr = __get_cpsr();
  __set_cpsr(_cpsr | FIQ_MASK);
  return _cpsr;
}

unsigned restoreFIQ(unsigned oldCPSR)
{
  unsigned _cpsr;

  _cpsr = __get_cpsr();
  __set_cpsr((_cpsr & ~FIQ_MASK) | (oldCPSR & FIQ_MASK));
  return _cpsr;
}

unsigned enableFIQ(void)
{
  unsigned _cpsr;

  _cpsr = __get_cpsr();
  __set_cpsr(_cpsr & ~FIQ_MASK);
  return _cpsr;
}







-- 
 ---
Ake Hedman (YAP - Yet Another Programmer)
eurosource, Brattbergavägen 17, 820 50 LOS, Sweden
Phone: (46) 657 413430 Cellular: (46) 73 84 84 102
Company home: http://www.eurosource.se      
Kryddor/Te/Kaffe: http://www.brattberg.com
Personal homepage: http://www.eurosource.se/akhe
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