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alee-forth/msp430/README.md

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msp430 implementation

This is the MSP430 port of Alee Forth. It produces a binary that enters a REPL made available on the UART peripheral at 115200 baud. The specific target is MSP430G2553.

Building

  1. make clean (just in case)
  2. make msp430-prep: Builds alee for the host computer and uses it to create an alee.dat blob containing bytecode for forth/core.fth and forth/msp430.fth.
  3. make msp430: Produces alee-msp430, a standalone binary for the MSP430 with built-in core and msp430 word-sets.

The final binary is < 11 kB and provides 150 bytes for user dictionary in RAM (assuming 512 bytes of total RAM).

msp430.fth

The msp430 word-set makes programming for the MSP430 easier:

  • All register names are defined (P1OUT, ADC10MEM, etc.).
  • r! and r@ to write and read device memory (i.e. registers).
  • rset, rclr, rtgl work like r! but set, clear, or toggle the given value/mask instead.