I would like to upload a .hex to ATTiny13V (or '13A) using Arduino Uno R3. I think I know everything to do, but ATTiny13 ISP support and Arduino IDE is a bit search-and-find, and I have some grey-areas in my understanding of how this all works together.
I got here by:
-Finding an Instructable that did something I liked, and there's a ATTiny13V used, a .hex to upload, and C source if I want to modify the source. Right now I do not need to modify the source, the available .hex is fine.
-I then looked for a way to have AVR programing from OS X. This seems a little problem, many AVR programmer hardware work great under Windows but seem to have mixed results under OS X. I saw Arduino could be used for this under OS X.
-I looked on local craigslist for Arduino, someone was selling a Uno R3 with some extras for a great price, and here we are. And now I have a lot more projects I wish to complete!
I am using Arduino 1.6.10 (from the .cc not the .org).
I read on stackexchange and other places that smeezekitty's core13 works for the ATTiny13. elabz.com/arduino-shrunk-how-to-use-attiny13-with-arduino-ide/
That's great, but: If I am not using any of the Arduino-specific commands, I don't think I need the bootloader, correct? I think it is not really a bootloader but builds support for some of the Arduino-specific higher-level commands used by sketch files.
Do I even need the ATTiny13 core files if I hook the pins up properly between the '13 on a breadboard and the Arduino (as per here: https://create.arduino.cc/projecthub/arjun/programming-attiny85-with-arduino-uno-afb829 ).
I really do not understand what the Arduino IDE/bootloader is doing for me as an abstraction layer. Do I need the bootloader if I'm not using any of the higher-level Arduino-specific commands on the chip? HOw about the core files for ATTinyanything vs specifically ATTiny13?
The hex file and C source I will be using are here: http://www.instructables.com/id/Programmable-LED/ My nextstep will be to modify the source. The C source looks like it references some AVR-specific header files. I see that the ArduinoIDE uses avrdude so maybe things will compile anyway?
I feel like I'm close but not 100% in my understanding of what I need to do, with the tools I have on hand.
Thanks for your help- I am not above a step-by-step.
Main question 1: I have a .hex file, an Arduino and IDE 1.6.10, OS X, and breadboard and useful components. What do I need to do to put the hex on this ATTiny13?
Main question 2: Jumping-off points for taking the C source I linked, tweaking it a bit, building a hex, and uploading that. I am not against moving it to a sketch if I have to, but it would be good for me to learn how this works before I mode to the IDE.
I have a small software background, am comfortable taking that C source and making changes and compiling (assuming I can find the needed .h files), but this is my first time working with any multiprocessors.