Debug problem for ADSP-21262
Started by ●May 3, 2006
Hi,I newly made a board using ADSP-21262. The Pcb has four layers including
power plane and ground plane. The HPPCI emnlator can find out there is 1 device
in the JTAG chain. However, it fails to go into VDSP due to
Reply by ●May 4, 20062006-05-04
I use the USB-ICE (1.0 Mbps) from Analog Devices. I have found it to be
extremely finicky. There are three main problems that I encounter:
1. ICE tester can't even recognize the Emulator hardware. This is because
of a USB error where the PC can't "see" the ICE.
2. ICE tester CAN see the JTAG device, but VDSP++ can't see it. I don't
know the cause of this error.
3. Extra copies of IDDE (VDSP++) process are hanging around. Make sure you
kill them all before starting VDSP++.
I use two levels of "reboot" to solve these problems. The steps are as
follows (in order):
Level 1: a) Turn off the device-under-test. b) Unplug the USB cable from
the PC. c) Unplug the ICE power. d) Plug in the ICE power. e) Plug the
USB cable into the PC (try running ICE-test if in doubt. If USB error
occurs, then go to level 2). f) Turn on the device-under-test. g) Restart
VDSP++.
Level 2: If Level 1 doesn't work: a) Unplug USB cable. b) Reboot the PC.
c) Execute level 1 reboot.
There are two major tips that I have to offer.
1. This one I got from Analog Devices Support: NEVER EVER attach the ICE
to a device that is already powered! This can permanently damage the ICE.
You must always make sure the ICE is powered BEFORE powering up the device
under test.
2. This one I found out the hard way: make sure your JTAG PCB traces are
50-75 ohm impedance or else your "device-under-test" will not be "seen" by
the ICE. You do this by contacting your PCB manufacturer to determine the
layer thicknesses and then setting the width of the PCB traces
appropriately. You must also make sure all the JTAG traces are of equal
length. I returned an ICE to Analog Devices because I thought it was faulty
when in reality my board impedances were borderline and drifted outside of
the functional range.
Good luck--these problems can be very frustrating...
-Todd
-----Original Message-----
From: a... [mailto:a...]On Behalf Of
p...@hit.edu.cn
Sent: Wednesday, May 03, 2006 2:42 AM
To: a...
Subject: [adsp] Debug problem for ADSP-21262
Hi,I newly made a board using ADSP-21262. The Pcb has four layers including
power plane and ground plane. The HPPCI emnlator can find out there is 1
device in the JTAG chain. However, it fails to go into VDSP due to
extremely finicky. There are three main problems that I encounter:
1. ICE tester can't even recognize the Emulator hardware. This is because
of a USB error where the PC can't "see" the ICE.
2. ICE tester CAN see the JTAG device, but VDSP++ can't see it. I don't
know the cause of this error.
3. Extra copies of IDDE (VDSP++) process are hanging around. Make sure you
kill them all before starting VDSP++.
I use two levels of "reboot" to solve these problems. The steps are as
follows (in order):
Level 1: a) Turn off the device-under-test. b) Unplug the USB cable from
the PC. c) Unplug the ICE power. d) Plug in the ICE power. e) Plug the
USB cable into the PC (try running ICE-test if in doubt. If USB error
occurs, then go to level 2). f) Turn on the device-under-test. g) Restart
VDSP++.
Level 2: If Level 1 doesn't work: a) Unplug USB cable. b) Reboot the PC.
c) Execute level 1 reboot.
There are two major tips that I have to offer.
1. This one I got from Analog Devices Support: NEVER EVER attach the ICE
to a device that is already powered! This can permanently damage the ICE.
You must always make sure the ICE is powered BEFORE powering up the device
under test.
2. This one I found out the hard way: make sure your JTAG PCB traces are
50-75 ohm impedance or else your "device-under-test" will not be "seen" by
the ICE. You do this by contacting your PCB manufacturer to determine the
layer thicknesses and then setting the width of the PCB traces
appropriately. You must also make sure all the JTAG traces are of equal
length. I returned an ICE to Analog Devices because I thought it was faulty
when in reality my board impedances were borderline and drifted outside of
the functional range.
Good luck--these problems can be very frustrating...
-Todd
-----Original Message-----
From: a... [mailto:a...]On Behalf Of
p...@hit.edu.cn
Sent: Wednesday, May 03, 2006 2:42 AM
To: a...
Subject: [adsp] Debug problem for ADSP-21262
Hi,I newly made a board using ADSP-21262. The Pcb has four layers including
power plane and ground plane. The HPPCI emnlator can find out there is 1
device in the JTAG chain. However, it fails to go into VDSP due to
