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Topic: Arduino without ftdi chip. (Read 4025 times) previous topic - next topic


Hi all.
Does anyone tried atmgea chips with USB supported communication?
Like this "ATmega32U4-AU",
Is it possible leave ftdi chip and use internal cicruit for usb programming?


Yes.  teensy is one.  http://www.pjrc.com/teensy/
It comes in 2 flavors.
Its ok, and it does work, but you use a different library so you have to be very careful if you want code that works on both usb and nonusb arduinos.

Another approach, if limited usb support is all you need, is to use software usb like vusb.
This approach will use about 1.5kb of your program space.


Mar 02, 2011, 03:44 pm Last Edit: Mar 02, 2011, 05:40 pm by frank26080115 Reason: 1
V-USB is awesome, check out USnooBie, its bootloader does not require any sort of serial converter at all.
Freelance engineer, consultant, contractor. Graduated from UW in 2013.




Thanks for replies. But if i understood well I don't need hardware support of USB as i mentoined.
I can use V-USB in every (almost) atmega chip.
I was thinking about using that dedicated USB pins. I would like to know more about that.


LUFA has bootloaders such as AVR109 which works with avrdude. I modified my Teensy++ to use AVR109 instead of Teensyloader.

One such implementation: http://ladyada.net/products/atmega32u4breakout/

To get LUFA: http://www.fourwalledcubicle.com/LUFA.php
Freelance engineer, consultant, contractor. Graduated from UW in 2013.


I finishing am a new board that is going to be shield compatible and use the ATmega32U4 with the AVR109 bootloader. I will post some info on it in a separate thread.

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