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Topic: Atmega238 standalone, simplest way to program (Read 960 times) previous topic - next topic

fadecomic

I would really just like to program the ATMega328 the same way I program ATTiny chips. I want to connect up the SPI connections, select Arduino as ISP, select my chip, and then upload. This works so smoothly and so flawlessly with the ATTiny chips. Yet it seems monumentally impossible with the ATMega328. Every single tutorial I see has me burn a bootloader and remove the microcontroller from the Arduino, remove the SPI connection, and connect up a raw serial connection. If I don't want to use an external crystal, I have to use a boards.txt from sources I don't know.

Can I not just use the SPI connection and program the 328 like an ATTiny85 without bothering with the bootloader? My UNO, which I am using as the ISP, has an SMD chip, so I cannot remove the microcontroller as required by most of the tutorials I've read. What is the easiest way to get a sketch onto a 328 with no external crystal?

I should point out that I am quite familiar now with this link: https://www.arduino.cc/en/Tutorial/ArduinoToBreadboard as it is the one that I am referencing above. This is the one that requires burning a bootloader and then removing the microcontroller from the Arduino being used as an ISP.

ron_sutherland

Perhaps try MiniCore's Upload Using Programmer option

https://github.com/MCUdude/MiniCore#programmers

and let me know if it works...  thanks.
my projects: https://github.com/epccs

fadecomic

Ah, thank you. That is precisely the kind of thing I was looking for. I will let you know how it goes!

fadecomic

Yes! You are beautiful. Thank you. That works great!

srnet

This is the one that requires burning a bootloader and then removing the microcontroller from the Arduino being used as an ISP.
All that is about is using the Arduino USB to serial bit to connect to the bare bones ATmega.

There are plenty of cheap USB-Serial adapters that will do the same job, its how you program Arduino Pro Minis for instance. 
http://www.50dollarsat.info/
http://www.loratracker.uk/

ron_sutherland

Welp that reaction was hilarious, MCUdude has done an excellent job figuring out how to get lots of options into the IDE.

I am guessing @fadecomic is not a noob even though he has ten post (atm). I only noticed a few words, like Tiny and ISP and avoiding the use of a bootloader... everything else was skipped or ignored. I get a lot of criticism for doing that but this is an internet forum (verified) and if you want real help... well good luck with that.
my projects: https://github.com/epccs

fadecomic

Yeah, I got that point of the linked tutorial was to program via serial, but that was actually what I was trying to avoid. I know I could buy a serial programmer cable, but I've already got this handy UNO, and a nice set of jumper wires. I just wanted to hook up MISO, MOSI, RESET, SCK and program that way.

Not a noob, just don't post here often. Unless I've been staring at a breadboard for a while.


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