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List:       openocd-development
Subject:    [OpenOCD-devel] [openocd:tickets] #123 TI Tiva EK-TM4C1294 launchpad broken
From:       "Balazs Racz" <bracz () users ! sf ! net>
Date:       2016-03-18 21:51:38
Message-ID: 56ec78690594ca3e5670b23f.tickets () openocd ! p ! sourceforge ! net
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** [tickets:#123] TI Tiva EK-TM4C1294 launchpad broken**

**Status:** new
**Milestone:** 0.9.0
**Created:** Fri Mar 18, 2016 09:51 PM UTC by Balazs Racz
**Last Updated:** Fri Mar 18, 2016 09:51 PM UTC
**Owner:** nobody


Hi,

I compiled openocd at 0.9.0 from git checkout (at tag v0.9.0) and I could not connect \
to the TI tiva connected launchpad. By bisecting the git history I have identified \
the change that caused the breakage:

064dc5daaccec5ba569d46aee0e9291352300d8b tcl/target/stellaris: Snowflake supports \
SYSRESETREQ too https://sourceforge.net/p/openocd/code/ci/064dc5daaccec5ba569d46aee0e9291352300d8b/


The error is the following:

(-snip-)
Error: memory write failed: 0x7
Error: memory read failed: 0x7
Error: jtag status contains invalid mode value - communication failure
TARGET: tm4c1294ncpdt.cpu - Not halted
in procedure 'reset' 
in procedure 'ocd_bouncer'
(-snip-)

If I check out 0.9.0, roll back this CL, build, then it works again. I don't know why \
it causes the failure.

There are more surprising things in the printout as well. Openocd 0.9.0 claims that \
it is using RCLK - adaptive speed, which I doubt because the RCLK pin is not wired up \
in the TI launchpads to the ICDI. Similarly I don't see an SRST wired up in the \
launchpad's circuit diagram, which might explain the fatal error too.

thanks,
Balazs


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<div class="markdown_content"><hr/>
<p><strong> <a class="alink" \
href="https://sourceforge.net/p/openocd/tickets/123/">[tickets:#123]</a> TI Tiva \
EK-TM4C1294 launchpad broken</strong></p> <p><strong>Status:</strong> new<br/>
<strong>Milestone:</strong> 0.9.0<br/>
<strong>Created:</strong> Fri Mar 18, 2016 09:51 PM UTC by Balazs Racz<br/>
<strong>Last Updated:</strong> Fri Mar 18, 2016 09:51 PM UTC<br/>
<strong>Owner:</strong> nobody</p>
<p>Hi,</p>
<p>I compiled openocd at 0.9.0 from git checkout (at tag v0.9.0) and I could not \
connect to the TI tiva connected launchpad. By bisecting the git history I have \
identified the change that caused the breakage:</p> \
<p>064dc5daaccec5ba569d46aee0e9291352300d8b tcl/target/stellaris: Snowflake supports \
SYSRESETREQ too<br/> <a \
href="https://sourceforge.net/p/openocd/code/ci/064dc5daaccec5ba569d46aee0e9291352300d \
8b/">https://sourceforge.net/p/openocd/code/ci/064dc5daaccec5ba569d46aee0e9291352300d8b/</a></p>
 <p>The error is the following:</p>
<p>(-snip-)<br/>
Error: memory write failed: 0x7<br/>
Error: memory read failed: 0x7<br/>
Error: jtag status contains invalid mode value - communication failure<br/>
TARGET: tm4c1294ncpdt.cpu - Not halted<br/>
in procedure 'reset' <br/>
in procedure 'ocd_bouncer'<br/>
(-snip-)</p>
<p>If I check out 0.9.0, roll back this CL, build, then it works again. I don't know \
why it causes the failure.</p> <p>There are more surprising things in the printout as \
well. Openocd 0.9.0 claims that it is using RCLK - adaptive speed, which I doubt \
because the RCLK pin is not wired up in the TI launchpads to the ICDI. Similarly I \
don't see an SRST wired up in the launchpad's circuit diagram, which might explain \
the fatal error too.</p> <p>thanks,<br/>
Balazs</p>
<hr/>
<p>Sent from sourceforge.net because openocd-devel@lists.sourceforge.net is \
subscribed to <a href="https://sourceforge.net/p/openocd/tickets/">https://sourceforge.net/p/openocd/tickets/</a></p>
 <p>To unsubscribe from further messages, a project admin can change settings at <a \
href="https://sourceforge.net/p/openocd/admin/tickets/options.">https://sourceforge.net/p/openocd/admin/tickets/options.</a> \
                Or, if this is a mailing list, you can unsubscribe from the mailing \
                list.</p></div>
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