Re: Lua Library for SPI and I2C

Hello

I have played a little bit with my RPi once but i used C library using FFI (because i couldn't find decent Lua library, iirc)

local alien = require 'alien'
local pigpio = alien.load 'pigpio'

and then like:

local gpioRead = pigpio.gpioRead
gpioRead:types{"uint", ret ="int"}

-- ....

-- skip

-- ....

local function piSclkTick()
gpioWrite(SCLK, HIGH)
gpioDelay(SPI_SCLK_HIGH_TIME)
local read_bit = gpioRead(MOSI)
gpioWrite(SCLK, LOW)
gpioDelay(SPI_SCLK_LOW_TIME)
return read_bit
end

etc etc

just read about how to usa FFI with Lua, and docs on pigpio library

Sincerely,

Volodymyr

On Sun, Dec 20, 2020 at 4:57 PM Foster Schucker <Foster@schucker.org> wrote:

Because we are a much extended family, our Christmas comes early,
normally the week before.

One of my gifts this year was a huge selection of Breakout Garden kits
from Pimorni

https://shop.pimoroni.com/collections/breakout-garden

I'd like to connect them to my Pi (the easy part) and then mess around
with Lua making things happen (the fun part)

But there is a fair amount of bit banging to get the I2C and SPI devices
to work.

Can you suggest a library that works with the Raspberry PI that you have
used?

One of my goals is to incorporate devices like the RGB encoder or the
trackball into my Pico-8 or Love games.

Thanks for your ideas and Happy Holiday!

Foster