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SpenceKonde / DxCore

Arduino core for AVR DA, DB, DD, EA and future DU-series parts - Microchip's latest and greatest AVRs. Library maintainers: Porting help and adviccee is available.
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Some documentation suggestions #31

Closed technoblogy closed 4 years ago

technoblogy commented 4 years ago

Thanks for providing this core! I've just successfully uploaded Blink to an AVR128DB28 on a breadboard.

Couple of comments:

  1. Using a Nano-based UPDI programmer I previously used to program 0-series and 1-series chips, I got the error:

    avrdude: jtagmkII_paged_write(): timeout/error communicating with programmer (status -1)

Thanks to the issue by @DustinWatts I realised I need to update jtag2updi, and it then worked. Perhaps mention this?

  1. The link Making a cheap UPDI programmer in megaTinyCore (now) gives a 404.
technoblogy commented 4 years ago
  1. Another one; in the section:

https://github.com/SpenceKonde/DxCore#dac-support

shouldn't the sentence "This voltage must be lower than Vcc to get the correct voltages." be removed?

SpenceKonde commented 4 years ago

Thanks, I've fixed these issues, please let me know if you find any more! (the DAC bit was supposed to indicate that the reference voltage must be lower than supply voltage. Somewhere I even have the number on how much lower, but didn't feel like digging it out.

technoblogy commented 4 years ago

the DAC bit was supposed to indicate that the reference voltage must be lower than supply voltage

But I thought you could give VDD as the reference voltage?

technoblogy commented 4 years ago

In:

https://github.com/SpenceKonde/DxCore/blob/master/megaavr/extras/DirectPortManipulation.md

the lines:

PORTA.OUT |= PIN4_bm; // write PB4 high
PORTA.OUT &=~PIN4_bm; // write PB4 low

should be:

PORTA.OUT |= PIN4_bm; // write PA4 high
PORTA.OUT &=~PIN4_bm; // write PA4 low