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This version is outdated by a newer approved version.DiffThis version (01 Nov 2012 18:47) was approved by Lars-Peter Clausen.The Previously approved version (05 Sep 2012 14:06) is available.Diff

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Table of Contents

AD2S1210 IIO Resolver-to-Digital Converter Linux Driver

Supported Devices

Reference Circuit

Description

This is a Linux industrial I/O (IIO) 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 IIO for more information.

Source Code

Status

Source Mainlined?
git Yes

Files

Function File
driver drivers/staging/iio/resolver/ad2s1210.c
include drivers/staging/iio/resolver/ad2s1210.h

Adding Linux driver support

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

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 AD2S1210 driver

			    [--snip--]

Driver Usage

The device file path may looks like, 

/sys/devices/platform/bfin-spi.0/spi0.3/iio/device0/ad2s1210>

There are two files:

File Name Permission Usage
raw_io read/write raw SPI read/write
reset write only soft reset
fclkin read/write show/store input clock
fexcit read/write show/store excitation clock
control read/write show/store control register
bits read/write show/store resolution
fault read only show fault register
pos read only 10/12/14/16 bits unsigned angular value
vel read only 10/12/14/16 bits signed velocity value
pos_vel read only 10/12/14/16 bits unsigned angular and signed velocity value
los_thrd read/write show/store los threshold register
dos_ovr_thrd read/write show/store dos overange register
dos_mis_thrd read/write show/store dos mismatch register
dos_rst_max_thrd read/write show/store dos reset maximum register
dos_rst_min_thrd read/write show/store dos reset minimum register
lot_high_thrd read/write show/store lot high threshold
lot_low_thrd read/write show/store lot low threshold
description read only description about this chip

More Information

Need Help?

31 Jul 2012 17:53 · Lars-Peter Clausen
02 Mar 2011 15:16
resources/tools-software/linux-drivers/iio-resolver/ad2s1210.1348844581.txt.gz · Last modified: 28 Sep 2012 17:03 by Robin Getz

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