Hi, I am new to microcontrollers and trying to help my son with his first one. Has anyone come across the "Could not find an Cortex-M device in the JTAG chain! Please check the JTAG cable and the connected devices." error before? Thanks.
That the debugger needs to be put in SWD mode rather than JTAG?
Or that the core isn't running, clock not running, in a low power mode.