ADIS16362 IIO Driver for Raspberry PI?

Hi,

The recommended way to interact with ADIS16362 is using the Linux kernel driver and IIO framework.

If you want direct register access you can have it through IIO debugfs direct_register_access.

Also ADI provide a Linux distribution based on Raspbian with all the ADI drivers already built in. You can find it here.

The examples you linked are userspace implementations of ADIS driver and use the SPI dev driver. Is there any reason you prefer user-space driver? The IIO driver is complete and already provide you some features like triggering and if required buffering of samples.  

Hi

Ok, I will install the ADI Raspbian Linux distribution with adis16400 and adis16475 drivers, but still want to use the  userspace driver to update the following routines, lets say in https://github.com/PX4/PX4-Autopilot/tree/master/src/drivers/imu/analog_devices/adis16470

_px4_accel.update(now, accel_x, accel_y, accel_z);

_px4_gyro.update(now, gyro_x, gyro_y, gyro_z);

So... if I include <iio.h> in the userspace driver and call iio_device_reg_read(adis16362, 0x02, &gyro_x) to read the data, would it work?

I need a working example of C code to understand and for userspace implementation along with IIO drivers.

Hi

Ok, I will install the ADI Raspbian Linux distribution with adis16400 and adis16475 drivers, but still want to use the  userspace driver to update the following routines, lets say in https://github.com/PX4/PX4-Autopilot/tree/master/src/drivers/imu/analog_devices/adis16470

_px4_accel.update(now, accel_x, accel_y, accel_z);

_px4_gyro.update(now, gyro_x, gyro_y, gyro_z);

So... if I include <iio.h> in the userspace driver and call iio_device_reg_read(adis16362, 0x02, &gyro_x) to read the data, would it work?

I need a working example of C code to understand and for userspace implementation along with IIO drivers.

Hi,

The role of the IIO driver is to create an abstraction layer over direct register writes. The register writes are handled by the driver internally and it provides you an interface to read the data like acceleration.

Please take a look at this IIO example. It is for a dummy IIO device and you should adapt it for your specific IIO device created by the adis16400 driver. You can identify its number using "iio_info -a". This command is part of libiio and you can study about that too.

Also there you'll see the channels supported by ADIS IIO device and reading those you'll actually get the data that's of interest for you.

Please take a look at adis16400 drivers documentation page. There is described in detail how the IIO channel data can be interpreted.