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utilities for controlling a Maxim DS1077L programmable oscillator
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# Background
The Maxim DS1077L oscillator is attached to the I2C bus as a slave. It has 3
registers that we can set to define its behavior. For details on the structure
of these registers and how they effect the behavior of the device consult the
spec sheet.

# Overview
This is a collection of utilities for getting and setting the state of these
registers. Each utility is specific to a register. To identify the DS1077L that
we're operating on, each utility takes an optional --address and --bus-dev

The DS1077L uses a 7 bit I2C bus address. The top 4 bits are hard wired to
'1011' and the lower 3 bits can be programmed to work around address conflicts.
Given this, the --address parameter must be in the range 0x58 - 0x5f. The
--bus-dev option specifies the device node associated with the I2C bus the DS1077L is attached. This is typically represented by a device node under /dev.

Additionally each utility takes a --get or a --set parameter to specify whether
the user wishes to display or set the state of a register. To get the register
state the user must specify the --get option. To set the register state the
user must specify the --set option along with a series of options specific to
the register that define the register state. For a description of the
parameters taken by each utility consult the usage message through the --help

# Building
These utilities are specific to Linux and depend on the Linux I2C userspace
headers. On Debian these are available through the libi2c-dev package. Once
these are installed the ds1077l-ctrl tools are built with the typical make

$ make
$ sudo make install

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