GuzuntyPi loading troubleshooting notes

I checked the wiring and found that I forgot to connected GuzuntyPi's 3V3 pin to RPi's 3V3 pin.  So there was no power to CPLD.  I added the 3V3 to 3V3 connection, but still got the loading error TDO mistmatch.

I check again and found that CPLD still got no power, and the reason is that I wrongly assumed that GuzuntyPi would by default connect all the ground pins.  Of course GuzuntyPi should not have done it, because this is already done by RPi.  Anyway, I checked that GuzuntyPi uses RPi's P1-06 as ground.  So I shifted the GuzuntyPi's ground wire to P1-06

Then I tried to load again.  This time I did not get the error message immediately and nothing happened and I thought the loader is loading and should say OK after 45 seconds as mentioned in the guide.  But after perhaps more than 45 seconds, I got the following error message.


pi@raspberrypi ~/Guzunty/Pi/src/gz_test $ sudo gz_load gz_test.xsvf
Guzunty loader v5.01, portions courtesy Xilinx, Inc.
XSVF file = gz_test.xsvf
ERROR:  TDO mismatch and exceeded max retries
ERROR at or near XSVF command #48.  See line #48 in the XSVF ASCII file.
ERROR:  TDO mismatch and exceeded max retriesExecution Time = 0.160 seconds

I noticed that this time the error was at or near XSVF command #48, instead of #8.  So I made some improvement at least.

.END




*** Screen log ***

login as: pi
pi@192.168.1.53's password:
Linux raspberrypi 3.2.27+ #250 PREEMPT Thu Oct 18 19:03:02 BST 2012 armv6l
...
Last login: Sat Mar  9 05:16:27 2013 from tlfongpc01.zyxel.com
pi@raspberrypi ~ $ ls
bcm2835-1.17             fpl426.py     python_programs         scripts
bcm2835-1.17 (1).tar.gz  Guzunty       quick2wire              src
berryio_install.sh       mcp23008      rasp_control            tight_vnc
b.tar                    mp3           RPi.GPIO-0.5.0a         wiringPi
Desktop                  py-spidev     RPi.GPIO-0.5.0a.tar.gz
Documents                python_games  Scratch
pi@raspberrypi ~ $ cd Guzunty
pi@raspberrypi ~/Guzunty $ ls
Pi
pi@raspberrypi ~/Guzunty $ cd Pi
pi@raspberrypi ~/Guzunty/Pi $ ls
bill of materials  design files  README.md  schematic  src
pi@raspberrypi ~/Guzunty/Pi $ cd src
pi@raspberrypi ~/Guzunty/Pi/src $ ls
gz_16i8o  gz_24i1O  gz_25i  gz_4p8o8i  gz_arduino     gzlib    gz_test
gz_16o8i  gz_24o1I  gz_25o  gz_8p8i    gz_led_driver  gz_load
pi@raspberrypi ~/Guzunty/Pi/src $ cd gz_test
pi@raspberrypi ~/Guzunty/Pi/src/gz_test $ ls
gz_test    gz_test.rpt  gz_test.vhd   Makefile
gz_test.c  gz_test.ucf  gz_test.xsvf

pi@raspberrypi ~/Guzunty/Pi/src/gz_test $ sudo gz_load gz_test.xsvf
Guzunty loader v5.01, portions courtesy Xilinx, Inc.
XSVF file = gz_test.xsvf
ERROR:  TDO mismatch and exceeded max retries
ERROR at or near XSVF command #48.  See line #48 in the XSVF ASCII file.
ERROR:  TDO mismatch and exceeded max retriesExecution Time = 0.150 seconds

pi@raspberrypi ~/Guzunty/Pi/src/gz_test $ sudo gz_load gz_test.xsvf
Guzunty loader v5.01, portions courtesy Xilinx, Inc.
XSVF file = gz_test.xsvf
ERROR:  TDO mismatch and exceeded max retries
ERROR at or near XSVF command #48.  See line #48 in the XSVF ASCII file.
ERROR:  TDO mismatch and exceeded max retriesExecution Time = 0.160 seconds

pi@raspberrypi ~/Guzunty/Pi/src/gz_test $ sudo gz_load gz_test.xsvf
Guzunty loader v5.01, portions courtesy Xilinx, Inc.
XSVF file = gz_test.xsvf
ERROR:  TDO mismatch and exceeded max retries
ERROR at or near XSVF command #8.  See line #8 in the XSVF ASCII file.
ERROR:  TDO mismatch and exceeded max retriesExecution Time = 0.060 seconds

pi@raspberrypi ~/Guzunty/Pi/src/gz_test $ sudo gz_load gz_test.xsvf
Guzunty loader v5.01, portions courtesy Xilinx, Inc.
XSVF file = gz_test.xsvf
ERROR:  TDO mismatch and exceeded max retries
ERROR at or near XSVF command #48.  See line #48 in the XSVF ASCII file.
ERROR:  TDO mismatch and exceeded max retriesExecution Time = 0.150 seconds

pi@raspberrypi ~/Guzunty/Pi/src/gz_test $ date
Sat Mar  9 06:12:28 UTC 2013
pi@raspberrypi ~/Guzunty/Pi/src/gz_test $

.END