FIFO sensors produce data at a well known rate, but samples come in
bunches, so we can't use the system clock to calculate deltaT.
non-FIFO sensors produce data when we sample them, but that rate is
less regular due to timing jitter.
For FIFO sensors this changes makes us use a learned sample rate,
which allows for different clock speeds on sensor and system board.
For non-FIFO sensors we use the system clock to measure deltaT
the overall effect is a fix for sensors that produce samples at other
than the claimed datasheet rate.
This allows each sensor to be uniquely identified in the system by using
either the index inside the backend or for those that use the Device
interface, to use the bus type, location, and device id.
We leave 16-bit for each sensor to be able to change its own
identification in future, which allows them to be changed in an
incompatible manner forcing a re-calibration.
We only leave the parameter there for backward-compatibility. However
product id on the inertial sensor is not much useful since it's only
kept for the first instance.
A better implementation per-gyro and per-accel is needed in order to
avoid problems with sensors taking the offsets configured for another
sensor.
The PSTR is already define as a NOP for all supported platforms. It's
only needed for AVR so here we remove all the uses throughout the
codebase.
This was automated with a simple python script so it also converts
places which spans to multiple lines, removing the matching parentheses.
AVR-specific places were not changed.
These changes are for enabling unified accelerometer vibration and clipping
calculation. For that, we need the values "rotated and corrected" before they
are filtered and the calculation must be called as soon as a new sample arrives
as it takes the sample rate into account.
Thus, move code that applies "corrections" to be executed as soon as accel data
arrive and call _publish_accel() passing rotate_and_correct parameter as false.
Also, do the same for gyro so we can keep it consistent.
This commit changes the way libraries headers are included in source files:
- If the header is in the same directory the source belongs to, so the
notation '#include ""' is used with the path relative to the directory
containing the source.
- If the header is outside the directory containing the source, then we use
the notation '#include <>' with the path relative to libraries folder.
Some of the advantages of such approach:
- Only one search path for libraries headers.
- OSs like Windows may have a better lookup time.
As we intend to eventually get board related parameters from a configuration
file, this commit makes the GPIO numbers for data-ready pins be instance
variables instead of from C constant macros.
Another advantage of using instance variables in this context is the
possibility of using more than one LSM9DS0.
If the data-ready polling is done entirely on GPIO pins, it isn't necessary to
hold the semaphore before we now we have data to consume. In that case, only
take the SPI semaphore if there's new data available.
On the other hand, if at least one SPI transaction is done in order to check
for new data, then it makes sense to take the semaphore beforehand.
This commit makes accel and gyro initialization routines use bitfield macros
instead of hardcoding the literal value when wrinting on registers. That is
less prone to typos and a lot of times self-explanatory. Also, due to the
latter, the long comments explaining each register field were removed (any
detail can be checked on the datasheet).
This adds the backend driver for LSM9DS0. This implementation is based on the
legacy driver coded by Víctor Mayoral Vilches (under folder LSM9DS0) and makes
some necessary adaptations and fixes in order to work properly. The legacy
driver folder was removed.
The new LSM9DS0 driver will consist of the AP_InertialSensor_L3GD20 and
the AP_InertialSensor_LSM303D. For that reason the old LSM9DS0
(consisting of gyro and accel+mag implemented on a single class) has
been moved to a folder.
Legacy LSM9DS0 didn't probe to receive "correct" data.
Andrew Tridgell
murata
Lucas De Marchi
raspilot
Caio Marcelo de Oliveira Filho
Gustavo Jose de Sousa
Víctor Mayoral Vilches
Andrew Tridgell