49 lines
1.7 KiB
Plaintext
49 lines
1.7 KiB
Plaintext
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picoc
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-----
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PicoC is a very small C interpreter. It's intended for use as a script
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language for embedded systems. It was originally written to be the
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script language for a UAV on-board flight system and is very suitable
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for other robotic, embedded and also non-embedded applications.
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The core C source code is less than 3000 lines of code. When compiled
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it only takes a few k of code space and is also very sparing of data
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space. This means it can work well in small embedded devices. It's also
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a fun example of how to create a very small language implementation
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while still keeping the code readable.
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Compiling picoc
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---------------
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picoc can be compiled for a UNIX/Linux/POSIX host by typing "make".
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The test suite can be run by typing "make test".
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Porting picoc
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-------------
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platform.h is where you select your platform type and specify the includes
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etc. for your platform.
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platform_support.c contains support functions so the compiler can work on
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your platform, such as how to write characters to the console etc..
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platform_library.c contains your library of functions you want to make
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available to user programs.
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There's also a new clibrary.c which contains user library functions like
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printf() which are platform-independent.
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Porting the system will involve setting up suitable includes and defines
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in platform.h, writing some I/O routines in platform_support.c, putting
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whatever user functions you want in platform_library.c and then changing
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the main program in picoc.c to whatever you need to do to get programs
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into the system.
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platform.h is set to UNIX_HOST by default so tests can be easily run on
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a UNIX system. You'll need to specify your own host setup dependent on
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your target platform.
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