altimeter - AVR code for an in-progress pressure altimeter

	Commit message (Collapse)	Author	Age
*	Print MCU fill as well as section size	David Phillips	2021-02-08
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*	Print cross ELF section size on make	David Phillips	2021-02-08
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*	Update README.md for unit testing and submodules	David Phillips	2021-02-08
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*	Add missing submodule ref	David Phillips	2021-02-08
\| \| \| \| \|	Forgot to add this on the previous commit when the submodule was added to .gitmodules
*	Add basic unit testing for util.c	David Phillips	2021-02-08
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*	Add quick README.md	David Phillips	2021-02-08
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*	Add documentation to Makefile	David Phillips	2021-02-08
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*	Set GPIOs for profiling/debug	David Phillips	2020-12-20
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*	Use float-enabled printf implementation	David Phillips	2020-12-20
\| \| \| \| \|	I hadn't realised there is a float-enabled printf implementation in AVR libc, so let's use that instead of our own hack.
*	Empty 6 lines on init of mock display	David Phillips	2020-12-13
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*	Remove unneeded variables	David Phillips	2020-12-13
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*	Set a 2 second watchdog timer	David Phillips	2020-12-13
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*	Derive OCR1A from F_CPU	David Phillips	2020-12-13
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*	Initial prototype	David Phillips	2020-12-13
	This patch adds a skeleton of AVR code for a "simulator" target (atmega2560) and for the real intended hardware target (atmega32u4). The simulator target is one that is supported by the QEMU AVR emulator, while the 32u4 is currently not.