We have built a SBC using the 257EV as a reference in Altium. We are trying to use debug. We have created a ST14 connector to connect to a STLink3 using UART 2 as the debug serial port.
Is this possible, and should we use SWD or JTAG to debug the processor.
At present we are stuck at a flashing red led1. At present the DDR & GPU supplies haven't started on the PMIC, the remaining supplies are all present, as is the HSE clock.
Any thoughts would be appreciated.
