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.fo...@nassur.net> 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 ... > > > _______________________________________________ > Amforth-devel mailing list for http://amforth.sf.net/ <http://amforth.sf.net/> > Amforth-devel@lists.sourceforge.net > <mailto:Amforth-devel@lists.sourceforge.net> > https://lists.sourceforge.net/lists/listinfo/amforth-devel > <https://lists.sourceforge.net/lists/listinfo/amforth-devel> _______________________________________________ Amforth-devel mailing list for http://amforth.sf.net/ Amforth-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/amforth-devel
