On 1/25/22 08:24, Dave Hansen wrote: > On 1/25/22 05:09, Sven Schnelle wrote: >>> Now the documentation states we need this super speed A<->A cable, but >>> could you also update the documentation for usb-c ? There's a fair >>> number of usb-c only devices out there now. >> Stupid beginners question: Would every USB3 A-A cable work, or are the >> debug cables special? I've read the RX/TX pairs have to be swapped, but >> to me it looks like that's always the case? > > My understanding is that the 5v line is disconnected. Here's one cable I have: > >> https://designintools.intel.com/SVT_DCI_DbC2_3_A_to_A_Debug_Cable_1_Meter_p/itpdciamam1m.htm > > I think they snip that line to prevent any chance of current flowing between devices. The cable isn't expensive, but I do remember being astounded at how much Intel charged itself for shipping it. ;) This one works OK: https://www.datapro.net/products/usb-3-0-super-speed-a-a-debugging-cable.html > That said, I've also used the same cable Peter has: just a cheap A-to-A cable I had lying around. It surely has VBUS connected, so I usually plumb it through a USB hub with a power switch. This surely isn't the "right" way to do it, but it does seem to work in some situations. -- ~Randy
