Hi,
Just wanted to speed up the flashing process while testing some small custom programs, so I soldered wires in J6 connector and connected to STM32 ST-LINK programmer (the CN2-SWD connector in STM32F407 Discovery board). For flashing, I used STM32 ST-LINK Utility. I made some small programs for toggling LED's and reading sensors. I used mikroBasic PRO for ARM . Everything was OK. But when I downloaded back the aq6.6.hex, only the power LED is on . I even loaded the 6.5 and 6.6hex the normal way trough QGC and FTDI interface but after downloading finishes and manual reset, nothing happens . Then again, I loaded my custom program hex file, this time using QGC and LED's are blinking and some sensors (adc,press,etc) outputs I can see them in one terminal emulator as it should be, so AQ PCB hardware looks OK (all voltages on PCB are OK - my quad was just sitting on the table while doing all of this) .
It is possible that some option bites are not properly set anymore after using ST-Link?
Regards,
Sergiu