Re: Support for ATTINY827, 1627 and 3227

[Konrad Rosenbaum]

Hi,

On 22/02/2023 05:48, dvalin@internode.on.net wrote:
> Yes, as stated. The UPDI programmer design I found needed an ATmega for
> USB to serial conversion and whatever. Seeing the simplicity of your
> approach, I'll skip that greater labour.
>
> Matt's solution seems similar, also on a custom PCB.

Considering how simple UPDI as a protocol is, it is surprising how 
expensive and complex most of the progger designs are.



> > The good news is: you can install arduino from its official download
> > on Linux without contaminating other environments, it just sits in a
> > separate directory and is quite happy there without installing stuff
> > elsewhere. So cleaning it up is just deleting this arduino directory
> > (and perhaps the "sketch" directory) from your home directory.
>
> Hmmm ... dodged for the moment, but will doubtless crop up in the
> future. After over 30 years of using the gnu toolchain on AVRs, PowerPC,
> NEC V850, etc., I'm not amenable to mucking up an established workflow
> by cluttering my mind with a dinky IDE. (And if it has a GUI, forget 
> it. ;-)
> AIUI, arduino source is gcc/g++ compatible, so it's probably just a
> case of dropping it onto a concrete floor so the cruft falls off.

Arduino is mainly a convenience library and some black magic to add 
#include statements that are missing from the sketches. The flow is 
approximately this: user writes a sketch, which is syntactically C++ 
(but you never use its full power, because nobody tells you). The sketch 
omits all #includes, it just uses the objects (like "Uart1"). The IDE 
then guesses which libraries you meant to use and wraps the sketch with 
the (hopefully) correct #includes. Then the sketch and all necessary 
library files get compiled and linked. Finally it uses avrdude to upload 
the binary into the chip.

So to compile an Arduino sketch you definitely need Arduino installed, 
because it uses its own libraries. You may be able to compile on the 
command line once you observed what the "magic" calls are. I never tried 
to compile sketches on the command line, I copied some of the more 
mundane calls into my own Makefiles and then abandoned the Arduino 
libraries - it seemed like a saner approach to me.

If you just have a sketch from an outside source, it is definitely 
easier to just start the GUI and compile the sketch from in there. Don't 
worry, the GUI is so terrible that it is almost reminiscent of the old 
SunOS days... ;-)

It's a good way to get people started on microcontrollers, but almost 
everybody eventually emancipates from it.


    Konrad

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