Current Project Status

As already stated, eLua allows you to run Lua completely on the microcontroller. A fast-growing set of complementary modules is also provided, for Lua programming eLua's generic peripherals.

The following modules are ready or being implemented:

• a (mostly) platform independent peripheral library (I/O, UART, SPI, I2C...)
• a very low footprint embedded rom file system, easy to port to different types of memory chips and other storage devices
• a small FAT rw file system layer for SD cards.
• an embedded editor, to edit Lua programs directly via a serial connection or other input devices
• a minimal "shell" (for file operations, environment configuration and other facilities)
• network support
• an embedded http server
• Terminal / Console over Ethernet

Porting eLua to another compatible platform should be as easy and painless as possible. Currently this is restricted to platforms for which the gcc+newlib combo is available. This might change in the future, but please not that this is not a priority of the project at this point.

Also, the Lua "core" comes in two flavors: "regular Lua" (using floating point as the number type) and "integer Lua" (using integers). We'll add more about this in a future tutorial about Lua. For now, it's enough to say that "regular Lua" will be able to perform floating point operations (but will be slower because the floating point operations will be emulated in software on the MCU), while "integer Lua" will only be able to perform operations with integer numbers (but support for fixed and even floating point can be added with separate modules) and thus will be faster.

Status of ports

You can see below the status of eLua implementation by platform/module.

Symbol list

Symbol
Meaning	Implemented and tested	Implemented, not tested	Not yet implemented	Not applicable

eLua ports status

Module	PIO	SPI	UART	TMR	PWM	NET	CPU	ADC
MCU
LM3S8962
LM3S6965
i386
AT91SAM7X256
AT91SAM7X512
STR912FW44
LPC2888
STR711FR2
AVR32
STM32

Project Roadmap

Status of features & roadmap

You can see below the status of the existent and planned eLua features. These are generic features (not platform dependent, so they should be available on any platform). The list is ordered by feature priority, with all the completed features at the top of the list.

eLua features status

Feature	Status
eLua interpreter running on targets
Various Lua scripts examples running properly
Choose floating point or integer Lua
eLua PIO module
eLua UART module
eLua Timer module
eLua platform data module
XMODEM receive
Embedded ROM file system
eLua SPI module
eLua term module
eLua shell
Lua PWM module
eLua I2C module
eLua ADC modules
eLua interrupt support
eLua bit operations module
eLua binary pack/unpack module
eLua "memory limiting" mode
Networking (LuaSocket or similar)
eLua CPU module
FAT File System layer for mmc/sd cards
Embedded R/W file system	Partially implemented and tested
eLua FP module (for integer Lua)
Embedded text editor
Lua debugging on target
eLua example programs	Partially implemented and tested
GUI/IDE interface for eLua