LILduino

Quick-and-dirty example of using Kostas Michalopoulos' LIL programming language on a microcontroller, using Arduino.

The currently included sources and readme are for LIL 20211019 which was the latest version as of when I wrote this (but see the section at the bottom, I made a few patches).

I tested it on an ESP32 and it ran perfectly without errors (that is, any segfaults or such. If I write bad code, it tells me so.) No guarantee for other platforms.

Documentation included at the top of each extension file.

LIL Patches

• Better number parsing - patched to allow hexadecimal and octal numbers instead of only decimal (by using sscanf() instead of atof() / atoll() and custom code in ee_numeric_element())
• Deleted all memory pools code (LIL_ENABLE_POOLS) because it is useless on a microcontroller.
• Added fast number types into the _lil_value_t struct to take advantage of hardware floating point support where available and reduce the number of string-->number conversions, increasing speed and reliablilty.
• Added a 10th callback, LIL_CALLBACK_CHECKINTERRUPT/void (*lil_checkinterrupt_callback_proc_t)(void), which gets called by lil_parse() before code is run, and can be used to periodically check for a keyboard interrupt and break out of an infinite loop.

Notes

• mine is a little bash script that makes the current user the owner of all files in the current working directory. I have it because for some reason I have to run the arduino IDE with sudo for it to work and as such when I save a file it changes the owner to root and then I can't edit the file anywhere else. Thus that script.

• LIL itself is licensed under the zlib license.