AD2S90

AD2S90 IIO Resolver-to-Digital Converter.

Supported Devices

AD2S90

Description

The AD2S90 is a complete 12-bit resolution resolver-to-digital converter that provides angular position measurement. It requires only a 3-wire serial interface and an external reference oscillator, offering a simple and cost- effective solution for shaft angle measurement in motor control systems.

Product Page

This is a Linux industrial I/O (Linux Industrial I/O Subsystem) subsystem driver, targeting Resolver-to-Digital Converters. The industrial I/O subsystem provides a unified framework for drivers for many different types of converters and sensors using a number of different physical interfaces (i2c, spi, etc). See Linux Industrial I/O Subsystem for more information.

Source Code

Status

Source	Mainlined?
git	Yes

Files

Function	File
driver	drivers/staging/iio/resolver/ad2s90.c

Adding Linux driver support

Configure kernel with make menuconfig (alternatively use make xconfig or make qconfig)

Note

The Driver depends on CONFIG_SPI

Linux Kernel Configuration
    Device Drivers  --->
        [*] Staging drivers  --->
            <*>     Industrial I/O support --->
                --- Industrial I/O support
                -*-   Enable ring buffer support within IIO
                -*-     Industrial I/O lock free software ring
                -*-   Enable triggered sampling support

                      *** Resolver to digital converters ***
                [--snip--]

                <*>   Analog Devices AD2S90 driver

                [--snip--]

Driver Usage

The device file path may looks like,

/sys/devices/platform/bfin-spi.0/spi0.3/iio/device0/ad2s90>

There are two files:

File Name	Permission	Usage
angular	read only	12 bits angular value
description	read only	description about this chip