Code samples for basic AVR ATtiny programming
This to go with the following Google Slides presentation.
Very basic example of blinking an LED in a naive busy-wait loop
Basic example of blinking 5 LED's in a naive busy-wait loop
Using hardware timer interrupt to blink an LED more effeciently
Using hardware watchdog interrupt to blink an LED very effeciently
Using Pulse Width Modulation (timers) to fade an LED
Using a hardware interrupt to detect and react to a button being pressed
Small but complete practical example of starting blinking a LED when a mailbox receives mail and turning it off when emptying mailbox
##Install Install the AVR GCC toolchain plus some programming software and use your favorite IDE. Sane developers would use Mac or Linux, I prefer the Debian variety of Linux so if you're on Ubuntu, Mint etc. simple do: sudo apt-get install avr-libc binutils-avr gcc-avr avrdude avarice gdb-avr
##Make The samples use standard C make files, borrowed from WinAVR. This means compiling, linking, flashing etc. is taken care of with one command. The Makefile have a few constants you may want to tweak if you are not using the usbasp programmer or the ATtiny13 MCU.
- make all = Make software.
- make clean = Clean out built project files.
- make coff = Convert ELF to AVR COFF.
- make extcoff = Convert ELF to AVR Extended COFF.
- make program = Download the hex file to the device, using avrdude.
- make debug = Start either simulavr or avarice as specified for debugging, with avr-gdb or avr-insight as the front end for debugging.
- make filename.s = Just compile filename.c into the assembler code only.