https://github.com/larsbrinkhoff/xforth

Experimental Forth cross compiler for tiny devices
https://github.com/larsbrinkhoff/xforth

8051 assembler avr compiler cortex-m cross-compile cross-compiler embedded forth microcontroller msp430 pic stm8

Last synced: 10 days ago
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Experimental Forth cross compiler for tiny devices

• Host: GitHub
• URL: https://github.com/larsbrinkhoff/xforth
• Owner: larsbrinkhoff
• License: gpl-3.0
• Created: 2017-07-31T07:40:09.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2021-04-30T22:15:30.000Z (over 3 years ago)
• Last Synced: 2024-10-13T11:06:56.101Z (24 days ago)
• Topics: 8051, assembler, avr, compiler, cortex-m, cross-compile, cross-compiler, embedded, forth, microcontroller, msp430, pic, stm8
• Language: Forth
• Homepage:
• Size: 12.9 MB
• Stars: 61
• Watchers: 18
• Forks: 14
• Open Issues: 32
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# lbForth Lite

This is a Forth cross compiler for tiny devices.  It's based on

[lbForth](http://github.com/larsbrinkhoff/lbForth).  Supported targets

are 8051, AVR, Cortex-M, MSP430, PIC, and STM8.  There's also support

for some classic machines: 6502 and PDP-8.

This is a temporary battleground to get things up and running.  I

expect to fold the finished result back into lbForth.

The targets are tested using these simulators: naken_asm, uCsim,

simulavr, gpsim, simh, and thumbulator.  The status of the tests is:

[![Test](https://travis-ci.org/larsbrinkhoff/xForth.svg?branch=master)](https://travis-ci.org/larsbrinkhoff/xForth)

The compiler is suitable for parts with 1K program memory and 64 bytes

RAM.  The kernel code occupies 100-500 bytes, and it's recommended to

reserve about 24 bytes for the stacks.  At this size, only a bare

minimum of Forth words are supported.  All targets come with a prefix

assembler with its own unique syntax.

There is no resident interpreter or compiler in the target.  Things

are set up to provide target interaction through tethered operation,

but it's not implemented yet.  For now, the output is a flat binary

file.  ELF or Intel hex format can be made available on request.

The assemblers, compiler, and kernel are written in Forth and are all

very simple.  The user is encouraged to make modifications as see fit.

### Manual

[See here](doc/manual.md).

### Glossary 

 

Compile-time words:

    : ; [ ] CONSTANT VARIABLE CODE END-CODE

    ['] [CHAR] LITERAL

    IF THEN ELSE AHEAD BEGIN AGAIN UNTIL WHILE REPEAT

Run-time words:

    COLD WARM

    ! C! @ C@ +!

    DROP NIP DUP ?DUP SWAP OVER

    >R R> R@

    + - 2* 2/ INVERT NEGATE AND OR XOR 1+ 1- CELL+

    0= 0< 0<> = <>