ublast_tms_seq() function

ublast_tms_seq - write a TMS sequence transition to JTAG Write a series of TMS transitions, where each transition consists in : - writing out TCK=0, TMS=\, TDI=\ - writing out TCK=1, TMS=\, TDI=\ which triggers the transition The function ensures that at the end of the sequence, the clock (TCK) is put low.