Can anyone verify the problem detailed below, suggest a workaround or
fix, or otherwise help out on this? I have a few ideas but have
failed to find even a workaround and would like some fresh ideas.
(I can, however, verify the default ext2 SD filesystem recovers nicely
from repeated mounted hard reboots. ;)
Thanks all!
-David Wagner
PROBLEM
Loading a user bitstream sometimes or often hangs the TS-7300,
requiring a hard reboot.
WHEN IT HAPPENS
Sometimes, the system hangs immediately upon loading a user bitstream.
It also hangs when pressing a key on an attached USB keyboard after a
user bitstream has been successfully loaded.
(The user bitstream is based on the boilerplate provided by TS, and
includes the provided ethernet port support. The board has been
booted to a current Debian Sarge (dist-upgrade on 2006-09-04) with the
most recent TS-supplied Linux 2.4 kernel.)
WHEN IT DOES NOT HAPPEN
After waiting some amount of time between power-up and execution of
load_ts7300, it works just fine, does not hang, and continues to
successfully load different user bitstreams. It appears this problem
does not occur after the video is shut off so long as it remains in
powersaving (blank) mode.
TO REPRODUCE THIS BUG
1. Power up the TS-7300 with a USB keyboard and VGA monitor attached.
2. On your machine with Quartus installed, unzip ts7300_opencore.zip
and open ts7300_opencore.qpf in Quartus.
3. Compile ts7300_top.v (press the plain triangular play button).
4. While you wait, log in to the TS-7300 through a serial connection.
5. Transfer ts7300_top.rbf to the TS-7300.
6. Wait for the video to blank. You may speed this along by logging
in to the virtual terminal using the USB keyboard and reducing the
timeout to one minute: setterm -blank 1
7. From the serial terminal: load_ts7300 ts7300_top.rbf
8. Verify the TS-7300 is still responsive to the serial terminal.
- Issue a sync command; you are about to reboot dirty.
9. Hit a key on the USB keyboard attached to the TS-7300.
10. Verify the TS-7300 no longer responds to the serial terminal.
11. Cycle the power.
12. Log in through a serial connection, and before the video blanks,
issue a sync command, wait a few seconds, then: load_ts7300 ts7300_top.rbf
13. Verify the TS-7300 no longer responds to the serial terminal.
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