Argh. My Gotek isn't acknowledged in the STMFlash software at all.
I've got a USB > Serial cable and one of those mini UART - (Both work fine on loopback and with other devices.) Same result on both.
I get either ""No response from the target, the Boot loader can not be started" , or "Unrecognized Device."
If I send 0x7F through Realterm, it returns 79 7F.
The device otherwise works as normal without the programming mode.
All my pin headers are good (re-soldered them just in case) I've tried re-setting, Win 7, XP mode, VMWare XP.
I've tried almost all the solutions I can find online, including baud rate, pulling pins out slightly, resetting, using the command line instead. Nada!
Anything else at all in the world I can try?!