Can't programm custom arduino board via USB

Hi,

I have create a custom arduino board with an ATMega328pb and a FT232RL, I have flash optiboot bootloader with a programmer and now i want to programm it via USB but when i click on upload, nothing happend (avrdude: stk500_recv(): programmer is not responding)

I don't know why....

Thanks

Did you use the Arduino's "burn bootloader", or some other procedure?
Are you using MCUDude's "miniCore"?

I don't see bypass caps on the atmega328b, nor the 2nd ground connection to pin 5...

Yes I use the arduino burn bootloader with Minicore !

I don't understand what you talk about... Bypass caps ? and pin 5 of atmega or ft232rl ?

thanks

I could be missing something but I don't see how VUSB gets to +5v.

Hi,

Thats why I call them Search A Word circuts.

Untitled
Tom.. :grinning: :+1: :coffee: :australia:

Well I tried to redo everything again:

  • load the bootloader,
  • send programm with programmer
  • send program via usb

Everything works well !

On the other hand, as soon as I unplug the programmer from the arduino board, I can no longer send via usb

OK. Thanks. But that does not explain where +5v is derived. I would have expected something like
VUSB --> Schottky Diode --> +5v (or even a mosfet)

Yes no problem about that I have a Relay for selecting VUSB or +5V don't worry about that

OH MY GOD !

I'me veeeeerrrrryyyyy sorry... I check all my prototype, I have remove the 0.1uF from DTR on FT232RL so arduino IDE can't reset properly before uploading... My bad....

All's good

This topic was automatically closed 120 days after the last reply. New replies are no longer allowed.