Flashing via USB-A to USB-C cable does not work
dstolpmann opened this issue · 2 comments
Hi,
I tried flashing an Artery based GoTek with a USB-A (male) to USB-C (male) cable as suggested in the wiki. However, my system did not recognize the GoTek. I tried different cables on a USB-C port of my system and via a USB-A (male) to USB-C (female) adapter, but none of the combinations worked. I finally managed to flash the GoTek via a USB-A (male) to USB-A (male) cable, which worked on the first try.
The wiki has been updated to mention the use of a USB-A (male) to USB-C (male) cable in this commit based on issue #655.
I am wondering if this maybe only works on some systems or with some cables. According to this StackExchange answer, the USB-C port has a way to detect whether it should supply power to a connected cable/device. I also tried to measure continuity through a USB-A (male) to USB-C (male) cable plugged into the USB-A (male) to USB-C (female) adapter and could not measure continuity on the +5V line, but on the other lines. So it seems my adapter blocks the +5V line, depending on the cable/device connected.
Did anyone else have success with using a standard USB-A (male) to USB-C (male) cable?
You know what, I don't think it's supposed to work. The A end should normally always be "host" and supply bus power. And so an A-C cable should not have the resistor(s) required to tell the C end to supply power. When it works, it's probably because cable or C receptacle is out of spec. I should update wiki to mention this may not work.
Wiki updated. Thanks for the report!