tcl/target/ti-cjtag.cfg

   1 # SPDX-License-Identifier: GPL-2.0-or-later
   2
   3 # A start sequence to change from cJTAG to 4-pin JTAG
   4 # This is needed for CC2538 and CC26xx to be able to communicate through JTAG
   5 # Read section 6.3 in http://www.ti.com/lit/pdf/swru319 for more information.
   6 proc ti_cjtag_to_4pin_jtag {jrc} {
   7         # Bypass
   8         runtest 20
   9         irscan $jrc 0x3f -endstate RUN/IDLE
  10         # Two zero bit scans and a one bit drshift
  11         pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
  12         pathmove DRPAUSE DREXIT2 DRUPDATE RUN/IDLE
  13         pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
  14         pathmove DRPAUSE DREXIT2 DRUPDATE RUN/IDLE
  15         pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
  16         pathmove DRPAUSE DREXIT2 DRSHIFT DREXIT1 DRUPDATE RUN/IDLE
  17         pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
  18
  19         # A two bit drhift and a 9 bit drshift
  20         pathmove DRPAUSE DREXIT2 DRSHIFT DRSHIFT DREXIT1 DRUPDATE RUN/IDLE
  21         pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
  22         pathmove DRPAUSE DREXIT2 DRSHIFT DRSHIFT DREXIT1 DRPAUSE
  23         pathmove DRPAUSE DREXIT2 DRSHIFT DRSHIFT DREXIT1 DRPAUSE
  24         pathmove DRPAUSE DREXIT2 DRSHIFT DRSHIFT DREXIT1 DRPAUSE
  25         pathmove DRPAUSE DREXIT2 DRSHIFT DRSHIFT DREXIT1 DRPAUSE
  26         pathmove DRPAUSE DREXIT2 DRSHIFT DREXIT1 DRPAUSE
  27         pathmove DRPAUSE DREXIT2 DRUPDATE RUN/IDLE
  28         pathmove RUN/IDLE DRSELECT DRCAPTURE DREXIT1 DRPAUSE
  29
  30         # Bypass
  31         irscan $jrc 0x3f -endstate RUN/IDLE
  32
  33         # Set ICEPick IDCODE in data register
  34         irscan $jrc 0x04 -endstate RUN/IDLE
  35 }