openinverter forum

I notice that the SDU logic board does not appear to use external pins 14 and 16 (labeled as RS232 TX and RX). I would like to bridge these pins to SWD and SWCLK to make the board externally programmable. Is there likely to be any problem doing so?

[REMOVED DIAGRAM WITH INCORRECT WIRING]

I've made this modification and it works correctly. Pins 14 and 16 can now be connected to an STM32 programmer. I intend to use this to develop and debug firmware, but it could also be useful for anyone else who wants to make their inverter un-brickable.