JTAG: Problems detecting flash

Hi,

I have a bricked iPaq h5450 here and want to reflash the bootloader. But the
jtag tool cannot detect the flash memory, so I cannot write to it.
I can, however, read from the flash memory.

Earlier this year I could restore another h5450 and I did not have this
problem.
I guess that there exist different revisions of this iPaq model, because this
iPaq has a small blue wire sondered on the backside of the mainboard, near
the SIM-card connector, and my earlier iPaq did not have this.

This is a typical JTAG session:
(Note that the output of detectflash differs.)

-----8<----- cut here ----------
JTAG Tools 0.5.1
Copyright (C) 2002, 2003 ETC s.r.o.
JTAG Tools is free software, covered by the GNU General Public License, and
you are
welcome to change it and/or distribute copies of it under certain conditions.
There is absolutely no warranty for JTAG Tools.

Warning: JTAG Tools may damage your hardware! Type "quit" to exit!

Type "help" for help.

jtag> cable parallel 0x378 DLC5
Initializing Xilinx DLC5 JTAG Parallel Cable III on parallel port at 0x378
jtag> detect
IR length: 5
Chain length: 1
Device Id: 01001001001001100100000000010011
  Manufacturer: Intel
  Part: PXA250
  Stepping: B2
  Filename: /usr/share/jtag/intel/pxa250/pxa250
jtag> detectflash
jedec_detect: mid ffffffff, did ffffffff
Flash not found!
jtag> detectflash
jedec_detect: mid ffffffff, did ffffffff
Flash not found!
jtag> detectflash
jedec_detect: mid ffffffff, did ffffffff
Flash not found!
jtag> detectflash
jedec_detect: mid 89, did ffffffff
Flash not found!
jtag> detectflash
jedec_detect: mid 0, did ffffffff
Flash not found!
jtag> detectflash
jedec_detect: mid 0, did ffffffff
Flash not found!
jtag> detectflash
jedec_detect: mid ffffffff, did ffffffff
Flash not found!
jtag> detectflash
jedec_detect: mid 0, did ffffffff
Flash not found!
jtag> readmem 0 0x40000 test.img
address: 0x00000000
length: 0x00040000
reading:
addr: 0x00040000
Done.
-----8<----- cut here ----------

I'd be glad if anyone could help me.

Thanks in advance,
Gert
Received on Fri Nov 19 2004 - 04:46:50 EST