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What is HYDRO_HWTYPE for? #50

spinda opened this Issue Apr 10, 2019 · 2 comments


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spinda commented Apr 10, 2019

It's set by Makefile.arduino, and default-initialized in hydrogen.h, but I can't find any place it's actually used.


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jedisct1 commented Apr 10, 2019

The AVR macro being defined is not enough to know about what exact microcontroller is being used, what timers are available, or more generally what we can use for entropy extraction.

The AVR code path currently only supports the ATMEGA328 since I use an Arduino Uno, but the idea of this macro was to support other boards/microcontrollers.


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spinda commented Apr 11, 2019

Got it. Thanks!

@spinda spinda closed this Apr 11, 2019

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