dvlopt.linux.i2c.smbus — dvlopt/linux.i2c 1.1.0

The SMBus protocol is more or less a subset of I2C. Quite often, SMBus operations can be carried out on an I2C bus. In consequence, the Linux kernel provides SMBus operation defined in the standard.

Those operations performs common interactions. Single byte can be exchanged, as well as words (2 bytes) and blocks (at most 32 bytes at a time). The term "command" refers to what is also called a "register".

Not every operation is supported by your driver and supported ones might fail with some inadapted slaves.

block-process-call clj

(block-process-call bus command bs)

Performs a multi-byte process call by writing a block acting as an argument and then reading a block acting as the result.

Cf. dvlopt.linux.i2c/capabilities for the :block-process-call capability.

process-call clj

(process-call bus command w)

Performs a simple process call by writing a word acting as an argument and then reading a word acting as the result.

Cf. dvlopt.linux.i2c/capabilities for the :process-call capability.

quick-read clj

(quick-read bus)

Sends a read message without any content.

Cf. dvlopt.linux.i2c/capabilities for the :quick capability.

quick-write clj

(quick-write bus)

Sends a write message without any content.

Cf. dvlopt.linux.i2c/capabilities for the :quick capability.

read-block clj

(read-block bus command)

Reads a block after specifying a command.

Cf. dvlopt.linux.i2c/capabilities for the :read-block capability.

read-byte clj

(read-byte bus command)

Reads a byte after specifying a command.

Cf. dvlopt.linux.i2c/capabilities for the :read-byte capability.

read-byte-directly clj

(read-byte-directly bus)

Reads a single byte.

Cf. dvlopt.linux.i2c/capabilities for the :read-byte-directly capability.

read-i2c-block clj

(read-i2c-block bus command length)

Reads a block of chosen length after specifying a command.

Not standard but often encountered and supported.

Cf. dvlopt.linux.i2c/capabilities for the :read-i2c-block capability.

read-word clj

(read-word bus command)

Read a word after specifying a command.

Cf. dvlopt.linux.i2c/capabilities for the :read-word capability.

write-block clj

(write-block bus command bs)

Writes a block after specifying a command as well as the number of bytes in the block.

Cf. dvlopt.linux.i2c/capabilities for the :write-block capability.

write-byte clj

(write-byte bus command b)

Write a byte after specifying a command.

Cf. dvlopt.linux.i2c/capabilities for the :write-byte capability.

write-byte-directly clj

(write-byte-directly bus b)

Writes a single byte.

Cf. dvlopt.linux.i2c/capabilities for the :write-byte-directly capability.

write-i2c-block clj

(write-i2c-block bus command bs)

Writes a block after specifying a command.

Unlike write-block, does not send a byte count.

Not standard but often encountered and supported.

Cf. dvlopt.linux.i2c/capabilities for the :write-i2c-block capability.

write-word clj

(write-word bus command w)

Writes a word after specifying a command.

Cf. dvlopt.linux.i2c/capabilities for the :write-word capability.