SPI class using Linux spidev.

>> source code

Overview

This is an implementation of the SPI class library for Linux.
Follows mruby, mruby/c common I/O API guidelines.

This library uses the Linux spidev device driver.
Works well on 32-bit and 64-bit OS.

Installation

$ gem install mruby-linux-spi

Features

• This class defines only master devices and transfers in 8-bit units.
• The Chip Select (CS/SS) will be managed spidev device driver automatically.

Operation check target

• Raspberry Pi 4
• Armadillo-IoT G3

Usage

about RaspberryPi...

# Connect pin #19 as MOSI, #21 as MISO, #23 as SCLK, #24 as CS.

require "mruby/spi"

# create instance
spi = SPI.new()

# read 4 bytes (send out 0x00 x 4bytes)
s = spi.read(4)

Other case, see original guidelines.
https://github.com/mruby/microcontroller-peripheral-interface-guide/blob/main/mruby_io_SPI_en.md

Licence

BSD 3-Clause License. see LICENSE file.