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- # A start sequence to change from cJTAG to 4-pin JTAG
- # This is needed for CC2538 and CC26xx to be able to communicate through JTAG
- # Read section 6.3 in http://www.ti.com/lit/pdf/swru319 for more information.
- proc ti_cjtag_to_4pin_jtag {jrc} {
- # Bypass
- irscan $jrc 0x3f -endstate RUN/IDLE
- # Two zero bit scans and a one bit drshift
- pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
- pathmove DRPAUSE DREXIT2 DRUPDATE RUN/IDLE
- pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
- pathmove DRPAUSE DREXIT2 DRUPDATE RUN/IDLE
- pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
- pathmove DRPAUSE DREXIT2 DRSHIFT DREXIT1 DRUPDATE RUN/IDLE
- pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
-
- # A two bit drhift and a 9 bit drshift
- pathmove DRPAUSE DREXIT2 DRSHIFT DRSHIFT DREXIT1 DRUPDATE RUN/IDLE
- pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
- pathmove DRPAUSE DREXIT2 DRSHIFT DRSHIFT DREXIT1 DRPAUSE
- pathmove DRPAUSE DREXIT2 DRSHIFT DRSHIFT DREXIT1 DRPAUSE
- pathmove DRPAUSE DREXIT2 DRSHIFT DRSHIFT DREXIT1 DRPAUSE
- pathmove DRPAUSE DREXIT2 DRSHIFT DRSHIFT DREXIT1 DRPAUSE
- pathmove DRPAUSE DREXIT2 DRSHIFT DREXIT1 DRPAUSE
- pathmove DRPAUSE DREXIT2 DRUPDATE RUN/IDLE
- pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
-
- # Bypass
- irscan $jrc 0x3f -endstate RUN/IDLE
-
- # Set ICEPick IDCODE in data register
- irscan $jrc 0x04 -endstate RUN/IDLE
- }
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