45a86f8e2a
Added support for the Cortex-M3 based TI low power RF SoC CC2538 and the CC26xx family. These chips need a start sequence for switching from cJTAG to JTAG before being used with OpenOCD, this is done in the tcl proc ti_cjtag_to_4pin_jtag in the ti-cjtag.cfg config. The configs for CC2538 and CC26xx run the start sequence on post-reset event and set the ICEPick IDCODE in the data register for OpenOCD to read, this is done so that every time OpenOCD resets the device, it will enable JTAG. Change-Id: I7db620211c0e7e03fad59d24fe31d23a9cdcfedc Signed-off-by: Jacob Palsson <jaaacke@gmail.com> Reviewed-on: http://openocd.zylin.com/2232 Tested-by: jenkins Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
33 lines
1.3 KiB
INI
Executable File
33 lines
1.3 KiB
INI
Executable File
# A start sequence to change from cJTAG to 4-pin JTAG
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# This is needed for CC2538 and CC26xx to be able to communicate through JTAG
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# Read section 6.3 in http://www.ti.com/lit/pdf/swru319 for more information.
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proc ti_cjtag_to_4pin_jtag {jrc} {
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# Bypass
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irscan $jrc 0x3f -endstate RUN/IDLE
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# Two zero bit scans and a one bit drshift
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pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
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pathmove DRPAUSE DREXIT2 DRUPDATE RUN/IDLE
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pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
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pathmove DRPAUSE DREXIT2 DRUPDATE RUN/IDLE
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pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
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pathmove DRPAUSE DREXIT2 DRSHIFT DREXIT1 DRUPDATE RUN/IDLE
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pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
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# A two bit drhift and a 9 bit drshift
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pathmove DRPAUSE DREXIT2 DRSHIFT DRSHIFT DREXIT1 DRUPDATE RUN/IDLE
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pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
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pathmove DRPAUSE DREXIT2 DRSHIFT DRSHIFT DREXIT1 DRPAUSE
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pathmove DRPAUSE DREXIT2 DRSHIFT DRSHIFT DREXIT1 DRPAUSE
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pathmove DRPAUSE DREXIT2 DRSHIFT DRSHIFT DREXIT1 DRPAUSE
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pathmove DRPAUSE DREXIT2 DRSHIFT DRSHIFT DREXIT1 DRPAUSE
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pathmove DRPAUSE DREXIT2 DRSHIFT DREXIT1 DRPAUSE
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pathmove DRPAUSE DREXIT2 DRUPDATE RUN/IDLE
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pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
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# Bypass
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irscan $jrc 0x3f -endstate RUN/IDLE
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# Set ICEPick IDCODE in data register
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irscan $jrc 0x04 -endstate RUN/IDLE
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}
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