35 lines
1.4 KiB
INI
35 lines
1.4 KiB
INI
# SPDX-License-Identifier: GPL-2.0-or-later
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# 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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