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====== ADIS16240 IIO Programmable Impact Sensor and Recorder Linux Driver ======

===== Supported Devices =====

  * [[adi>ADIS16240]]

===== Evaluation Boards =====

  * [[adi>EVAL-ADIS16240|ADIS16240/PCBZ]]
===== Description =====

This is a Linux industrial I/O ([[software:linux:docs:iio:iio|IIO]]) subsystem driver, targeting serial interface Accelerometer.
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 [[software:linux:docs:iio:iio|IIO]] for more information.

====== Source Code ======

===== Status =====

^ Source ^ Mainlined? ^
| [[git.linux.org>drivers/staging/iio/accel/adis16240_core.c|git]] | [[git.linux.org>drivers/staging/iio/accel/adis16240_core.c|Yes]] |
===== Files =====

^ Function ^ File ^
| driver  | [[staging.kernel.org>drivers/staging/iio/accel/adis16240_core.c]] |
| driver  | [[staging.kernel.org>drivers/staging/iio/accel/adis16240_ring.c]] |
| driver  | [[staging.kernel.org>drivers/staging/iio/accel/adis16240_trigger.c]] |
| include | [[staging.kernel.org>drivers/staging/iio/accel/adis16240.h]] |

{{page>software/linux/docs/platform_and_bus_model#Declaring SPI slave devices&firstseconly&noeditbtn}}

Depending on the converter IC used, you may need to set the modalias accordingly, matching your part name.
It may also required to adjust max_speed_hz. Please consult the datasheet, for maximum spi clock supported by the device in question.

<code c>
static struct spi_board_info board_spi_board_info[] __initdata = {
#if defined(CONFIG_ADIS16240) \
	|| defined(CONFIG_ADIS16240_MODULE)
	{
		.modalias = "adis16240",
		.max_speed_hz = 1500000,     /* max spi clock (SCK) speed in HZ */
		.bus_num = 0,
		.chip_select = 5, /* CS, change it for your board */
		.platform_data = NULL, /* No spi_driver specific config */
		.mode = SPI_MODE_3,
		.irq = IRQ_PF4,
	},
#endif
};
</code>

<code c>
static int __init board_init(void)
{
	[--snip--]

	spi_register_board_info(board_spi_board_info, ARRAY_SIZE(board_spi_board_info));

	[--snip--]

	return 0;
}
arch_initcall(board_init);
</code>

====== Adding Linux driver support ======

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

<WRAP round help>
The ADIS16240 Driver depends on **CONFIG_SPI**
</WRAP>

<code>
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

			          *** Accelerometers ***
			    [--snip--]

			    <*>   Analog Devices ADIS16240 Programmable Impact Sensor and Recorder

			    [--snip--]

</code>

====== Hardware configuration ======


====== Driver testing ======

{{page>software:linux:docs:iio:iio_snippets#iio device files&noheader&firstseconly&noeditbtn}}

<WRAP box bggreen><wrap info>This specifies any shell prompt running on the target</wrap>
<xterm>
root:/> **cd /sys/bus/iio/devices/**
root:/sys/bus/iio/devices> **ls**
iio:device0  trigger0


root:/sys/bus/iio/devices> **cd iio:device0**
root:/sys/devices/platform/bfin-spi.0/spi0.5/iio:device0> **ls -l**
-r--r--r--    1 root     root          4096 Jan  4 04:15 accel_xyz_squared_peak_raw
drwxr-xr-x    2 root     root             0 Jan  4 04:15 buffer
-r--r--r--    1 root     root          4096 Jan  4 04:15 dev
-rw-r--r--    1 root     root          4096 Jan  4 04:15 in_accel_x_calibbias
-r--r--r--    1 root     root          4096 Jan  4 04:15 in_accel_x_raw
-rw-r--r--    1 root     root          4096 Jan  4 04:15 in_accel_x_scale
-rw-r--r--    1 root     root          4096 Jan  4 04:15 in_accel_y_calibbias
-r--r--r--    1 root     root          4096 Jan  4 04:15 in_accel_y_raw
-rw-r--r--    1 root     root          4096 Jan  4 04:15 in_accel_y_scale
-rw-r--r--    1 root     root          4096 Jan  4 04:15 in_accel_z_calibbias
-r--r--r--    1 root     root          4096 Jan  4 04:15 in_accel_z_raw
-rw-r--r--    1 root     root          4096 Jan  4 04:15 in_accel_z_scale
-r--r--r--    1 root     root          4096 Jan  4 04:15 in_temp0_raw
-rw-r--r--    1 root     root          4096 Jan  4 04:15 in_temp0_scale
-r--r--r--    1 root     root          4096 Jan  4 04:15 in_voltage0_supply_raw
-rw-r--r--    1 root     root          4096 Jan  4 04:15 in_voltage0_supply_scale
-r--r--r--    1 root     root          4096 Jan  4 04:15 in_voltage1_raw
-r--r--r--    1 root     root          4096 Jan  4 04:15 name
drwxr-xr-x    2 root     root             0 Jan  4 04:15 power
--w-------    1 root     root          4096 Jan  4 04:15 reset
-r--r--r--    1 root     root          4096 Jan  4 04:15 sampling_frequency_available
drwxr-xr-x    2 root     root             0 Jan  4 04:15 scan_elements
lrwxrwxrwx    1 root     root             0 Jan  4 04:15 subsystem -> ../../../../../bus/iio
drwxr-xr-x    2 root     root             0 Jan  4 04:15 trigger
-rw-r--r--    1 root     root          4096 Jan  4 04:15 uevent
</xterm></WRAP>

=== Show device name ===

<WRAP box bggreen><wrap info>This specifies any shell prompt running on the target</wrap>
<xterm>
root:/sys/devices/platform/bfin-spi.0/spi0.5/iio:device0> **cat name**
adis16240
</xterm></WRAP>

=== ADIS16240 device attributes ===

For a detailed description please see:
[[staging.kernel.org>drivers/staging/iio/Documentation/sysfs-bus-iio]]

^ Device files ^
| accel_xyz_squared_peak_raw |
| in_accel_x_calibbias |
| in_accel_x_raw |
| in_accel_x_scale |
| in_accel_y_calibbias |
| in_accel_y_raw |
| in_accel_y_scale |
| in_accel_z_calibbias |
| in_accel_z_raw |
| in_accel_z_scale |
| in_temp0_raw |
| in_temp0_scale |
| in_voltage0_supply_raw |
| in_voltage0_supply_scale |
| in_voltage1_raw |
| name |
| reset |
| sampling_frequency_available |

===== Trigger management =====

<WRAP round help>
This driver only supports it's own default trigger source **adis16240-dev0**
</WRAP>

<WRAP box bggreen><wrap info>This specifies any shell prompt running on the target</wrap>
<xterm>
root:/sys/devices/platform/bfin-spi.0/spi0.5/iio:device0> **cat trigger/current_trigger**
adis16240-dev0
</xterm></WRAP>

===== Buffer management =====

<WRAP box bggreen><wrap info>This specifies any shell prompt running on the target</wrap>
<xterm>
root:/sys/devices/platform/bfin-spi.0/spi0.5/iio:device0/buffer> **ls**
**bytes_per_datum**  **enable**           **length**
</xterm></WRAP>

{{page>software:linux:docs:iio:iio_snippets#Buffer management&noheader&firstseconly&noeditbtn}}

<WRAP box bggreen><wrap info>This specifies any shell prompt running on the target</wrap>
<xterm>
root:/sys/devices/platform/bfin-spi.0/spi0.5/iio:device0/scan_elements>**ls**
in_accel_x_en             in_accel_z_index          in_timestamp_type
in_accel_x_index          in_accel_z_type           in_voltage0_supply_en
in_accel_x_type           in_temp0_en               in_voltage0_supply_index
in_accel_y_en             in_temp0_index            in_voltage0_supply_type
in_accel_y_index          in_temp0_type             in_voltage1_en
in_accel_y_type           in_timestamp_en           in_voltage1_index
in_accel_z_en             in_timestamp_index        in_voltage1_type
</xterm></WRAP>

{{page>software:linux:docs:iio:iio_snippets#Typical ADC scan elements&noheader&firstseconly&noeditbtn}}

====== More Information ======

{{page>software:linux:docs:iio:iio_snippets#iio pointers&noheader&firstseconly&noeditbtn}}
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