mirror of https://github.com/hsoft/collapseos.git
17 lines
912 B
Markdown
17 lines
912 B
Markdown
# AVR include files
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This folder contains header files that can be included in AVR assembly code.
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These definitions are organized in a manner that is very similar to other
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modern AVR assemblers, but most bits definitions (`PINB4`, `WGM01`, etc.) are
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absent. This is because there's a lot of them, each symbol takes memory during
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assembly and machines doing the assembling might be tight in memory. AVR code
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post collapse will have to take the habit of using numerical masks accompanied
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by comments describing associated symbols.
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To avoid repeats, those includes are organized in 3 levels. First, there's the
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`avr.h` file containing definitions common to all AVR models. Then, there's the
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"family" file containing definitions common to a "family" (for example, the
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ATtiny 25/45/85). Those definitions are the beefiests. Then, there's the exact
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model file, which will typically contain RAM and Flash boundaries.
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