Re: [Amforth] Flashing AmForth to Arduino Leonardo

[Fred Z. <fze...@gm...>]

Connect the Arduino Leoardo via a USB Hub to your Macbook. Most of the times that solves the USART logic voltage level problem.
This way I solved a problem I had with a Chinese Arduino clone. (Used a USB 2.0 Hub then). 

Fred

> Op 13 dec. 2018, om 12:39 heeft Erich Wälde <ew....@na...> het volgende geschreven:
> 
> Hello Jan,
> 
> Jan Kromhout writes:
> 
>> Hi,
>> 
>> Flashing the Arduino Uno is giving no problems.
>> 
>> Try to flash the Leonardo.
>> I’m using the Pololu AVR programmer v2.1
>> This is my command.
>> 
>> MacBook-Pro-van-Jan-10:avrdude jankromhout$ avrdude -p m32u4 -c avrispv2 -P /dev/tty.usbmodem00230362 -U efuse:w:0xFF:m -U hfuse:w:0xD9:m -U lfuse:w:0xFF:m -U flash:w:leonardo.hex:i -U eeprom:w:leonardo.eep.hex:i
>> 
>> It isn’t working
>> Can someone help me with this problem.
> 
> looking into old files of mine ... 2013-05-01
> 
> I have not succeeded with a leonardo either. Attaching did create a
> serial interface (/dev/ttyACM0), however, after erasing leonardo's
> flash, this disappeared. So maybe usb connection is not through a FTDI
> chip? THIS is a highly questionable idea, be warned. But might be worth
> to check the schematics.
> 
> https://www.arduino.cc/en/Main/Arduino_BoardLeonardo <https://www.arduino.cc/en/Main/Arduino_BoardLeonardo>
> https://www.arduino.cc/en/uploads/Main/arduino-leonardo-schematic_3b.pdf <https://www.arduino.cc/en/uploads/Main/arduino-leonardo-schematic_3b.pdf>
> 
> There is no FTDI, as far as I can see, however, how erasing the
> atmega32u4 flash results in not responding to the ISP programmer, is not
> obvious to me. I succeeded in erasing once. Nothing after that.
> 
> 
> Please note that the _atmega_32_u4_ is a quite different beast from the
> atmega_328p. So fuse settings would be another candidate to check.
> 
> I didn't find my leonardo just now ... so I can't play with it.
> 
> 
> Cheers,
> Erich
> 
> 
> --
> May the Forth be with you ...
> 
> 
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