dvlopt.linux.i2c

Easily use I2C from your clojure program.

Based on linux-i2c.java. This library provides an API around the standard Linux interface for talking to slave devices.

For information about running Clojure on the Raspberry Pi, here is a guide.

Usage

Read the API.

In short, without error checking :

(require '[dvlopt.linux.i2c       :as i2c]
         '[dvlopt.linux.i2c.smbus :as smbus])


(with-open [bus (i2c/bus "dev/i2c-1")]

    ;; Selects a slave device.
    (i2c/select-slave bus
                      0x24)

    ;; Reads 8 bytes.
    (i2c/read bus
              8)
    => [...]

    ;; Write a few bytes
    (i2c/write bus
               [42 1 2 3])

    ;; Does a transactions, several messages without interruption.

    (i2c/transaction bus
                     [{::i2c/slave-address 0x24
                       ::i2c/write         [42 1 2 3]}
                      {::i2c/slave-address 0x24
                       ::i2c/read          4
                       ::i2c/tag           :some-read}])

    => {:some-read [...]}

    ;; A few SMBus operations.

    (smbus/quick-write bus)

    (smbus/read-byte bus
                     42)

    (smbus/write-block bus
                       43
                       [1 2 3])
    )

License

Copyright © 2017-2018 Adam Helinski

Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.