https://github.com/jonathanstowe/rpi-device-smbus

i2c on Raspberry Pi for Raku
https://github.com/jonathanstowe/rpi-device-smbus

i2c raku raspberry-pi smbus

Last synced: 23 days ago
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i2c on Raspberry Pi for Raku

• Host: GitHub
• URL: https://github.com/jonathanstowe/rpi-device-smbus
• Owner: jonathanstowe
• License: artistic-2.0
• Created: 2015-12-29T22:27:27.000Z (about 9 years ago)
• Default Branch: master
• Last Pushed: 2022-08-08T07:34:31.000Z (over 2 years ago)
• Last Synced: 2023-04-22T17:07:00.170Z (over 1 year ago)
• Topics: i2c, raku, raspberry-pi, smbus
• Language: C
• Homepage:
• Size: 31.3 KB
• Stars: 3
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: Changes

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README

        
# RPi::Device::SMBus

i²c on Raspberry Pi for Raku

![Build Status](https://github.com/jonathanstowe/RPi-Device-SMBus/workflows/CI/badge.svg)

## Synopsis

```raku

    use RPi::Device::SMBus;

    # Obviously you will need to actually read the data sheet of your device.

    my RPi::Device::SMBus $smbus = RPi::Device::SMBus.new(device => '/dev/i2c-1', address => 0x54);

    $smbus.write-byte(0x10);

    ....

```

## Description

This is an SMBus/i²c interface that has been written and tested for

the Raspberry Pi, however it uses a fairly generic POSIX interface so if

your platform exposes the i²c interface as a character special device

it may work.

In order to use this you will need to install and configure the i2c-dev

kernel module and tools.  On a default Debian image you should be able

to just do:

    sudo apt-get install libi2c-dev i2c-tools

And then edit the ```/etc/modules``` to add the modules by adding:

    i2c-dev 

    i2c-bcm2708

Or for a Raspberry Pi 3

    i2c-dev

    i2c-bcm2835

And then rebooting.

If you have a more recent raspbian you may alternatively be able to use

```raspi-config``` where you can turn on ```i2c``` under "Interfacing Options".

Typicaly the i2c device will be ```/dev/i2c-1``` on a Raspberry Pi rev

B. or v2 or ```/dev/i2c-0``` on older versions.

You can determine the bus address of your device by doing:

    sudo i2cdetect -y 1  # replace the 1 with a 0 for older versions

(Obviously the device should be connected, consult the manual for your

device about this.)

Which should give you the hexadecimal address of your device.  Some

devices may not respond, so you may want to either check the data sheet

of your device or read the ```i2cdetect``` manual page to get other options.

It should be noted that because there is no easy way of testing this without

using physical devices then it may not work perfectly in all cases, but I'd

be delighted to receive patches for any issues found.

## Installation

Assuming you have a working Rakudo installation you should be able to install this with *zef* :

    # From the source directory

   

    zef install .

    # Remote installation

    zef install RPi::Device::SMBus

The tests are likely to completely fail on anything but a Raspberry Pi with the i²c configured as above.

## Support

Suggestions/patches are welcomed via [github](https://github.com/jonathanstowe/RPi-Device-SMBus/issues)

## Licence

This is free software.

Please see the [LICENCE](LICENCE) file in the distribution

© Jonathan Stowe 2015 - 2021