# 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 }