Awesome

LaBASIC

Description

Now you can turn your LaFortuna into an 80s portable computer! What? It's already dumb like an 80s computer? Ah, ok, 70s! Or whenever BASIC was invented.

In case you haven't guessed, LaBASIC is a BASIC interpreter for the LaFortuna board. The reason I decided to create an interpreter is to make programming on the LaFortuna easier. I know nothing can match C, but sometimes you want to hack something quickly and a higher level language is perfect for this. Whether BASIC is the appropriate choice for an interpreted language will be left up for debate to the reader.

Commands

Working:

PRINT 'some string'         # print any string
PRINT ENDL                  # print a new line
PRINT $varname              # print the value of a variable
LED ON                      # turn the LED on
LED OFF                     # turn the LED off
PAUSE 123                   # pause for 123 ms
LET varname = 42            # assign a value to a variable
GOTO 5                      # skip to the instruction on line 5 (1-based index)
READ input                  # read a number with the rotary encoder and store it in a variable

To be implemented:

PINMODE 1, 1
variable = <expr>
IF <expr> THEN cmd
FOR variable = start TO end STEP step
LOAD "filename", SAVE "filename, DIR, DELETE "filename"
and other commands from BASIC

Future plans

Add support for mathematical expressions by implementing a better parser
Add built-in APIs to allow LaBASIC programmers to access the file system, serial interface, etc
Create an online documentation website with code examples and command reference
Allow running LaBASIC programs from the filesystem instead of hardcoding them

Sources

The code is available on GitHub: https://github.com/aluxian/UoS-CS2-LaBASIC

Credits

I got the idea from Robin Edwards' ArduinoBASIC interpreter:

https://github.com/robinhedwards/ArduinoBASIC

Based on FortunaOS which includes:

The RIOS Scheduler
Peter Dannegger’s Code for the Rotary Encoder
Peter Dannegger’s Code for Switch debouncing
Steve Gunn’s display driver
ChanN’s FAT File System

Usage

Install the AVR toolchain and make
Clone the GitHub repository
Edit main.c and modify the hardcoded LaBASIC program
Connect your LaFortuna board to your computer
Run make to flash your board

License

GNU GPL