**** BEGIN LOGGING AT Tue Jun 07 02:59:58 2016 Jun 07 12:36:27 hi all Jun 07 12:39:59 I need a little advice please. I am writting a driver for supporting a custom High Speed Jtag Dongle. My driver is based on the bitbang driver, the thing is how tdo are received by OpenOCD ? I saw that the read function is called only one time in the bitbang.c file. How other driver read tdo output ? I am stucked with the following error : "JTAG scan chain interrogation failed: all ones". I supposed OpenOCD didn't receive anything... Jun 07 12:40:07 the dongle works **** ENDING LOGGING AT Wed Jun 08 02:59:59 2016