upm/examples/c/bno055.c
Jon Trulson d4b536b593 bno055: C port; C++ wraps C
The API has been changed in some cases - see the apichanges.md
document.

In addition, this driver uses a new upm_vectortypes.i SWIG interface
file to provide a mechanism for methods that return a vector of floats
and ints instead of a pointer to an array.

This works much nicer than C array pointers, and results in Python/JS/Java
code that looks much more "natural" to the language in use.

The Python, JS, and Java examples have been changed to use these
methods.  Support for the "old" C-style pointer methods are still
provided for backward compatibility with existing code.

As an example - to retrieve the x, y, and z data for Euler Angles from
the bno055, the original python code would look something like:

       ...
       x = sensorObj.new_floatp()
       y = sensorObj.new_floatp()
       z = sensorObj.new_floatp()
       ...
       sensor.getEulerAngles(x, y, z)
       ...
       print("Euler: Heading:", sensorObj.floatp_value(x), end=' ')
       print(" Roll:", sensorObj.floatp_value(y), end=' ')
       ...

Now the equivalent code is simply:

       floatData = sensor.getEulerAngles()
       print("Euler: Heading:", floatData[0], ...
       print(" Roll:", floatData[1], end=' ')
       ...

Additionally, interrupt handling for Java is now implemented
completely in the C++ header file now rather than the .cxx file, so no
special SWIG processing is required anymore. See Issue #518 .

Signed-off-by: Jon Trulson <jtrulson@ics.com>
2017-03-07 13:16:24 -07:00

120 lines
3.4 KiB
C

/*
* Author: Jon Trulson <jtrulson@ics.com>
* Copyright (c) 2017 Intel Corporation.
*
* The MIT License
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <unistd.h>
#include <stdbool.h>
#include <stdio.h>
#include <upm_utilities.h>
#include <signal.h>
#include "bno055.h"
bool shouldRun = true;
void sig_handler(int signo)
{
if (signo == SIGINT)
shouldRun = false;
}
int main(int argc, char **argv)
{
signal(SIGINT, sig_handler);
//! [Interesting]
// Initialize a BNO055 using default parameters (bus 0, addr
// 0x28). The default running mode is NDOF absolute orientation
// mode.
bno055_context sensor = bno055_init(0, BNO055_DEFAULT_ADDR);
if (!sensor)
{
printf("bno055_init() failed.\n");
return 1;
}
// First we need to calibrate....
printf("First we need to calibrate. 4 numbers will be output every \n"
"second for each sensor. 0 means uncalibrated, and 3 means \n"
"fully calibrated.\n"
"See the UPM documentation on this sensor for instructions on \n"
"what actions are required to calibrate.\n");
// do the calibration...
while (shouldRun && !bno055_is_fully_calibrated(sensor))
{
int mag, acc, gyr, sys;
bno055_get_calibration_status(sensor, &mag, &acc, &gyr, &sys);
printf("Magnetometer: %d Accelerometer: %d Gyroscope: %d System: %d\n",
mag, acc, gyr, sys);
upm_delay(1);
}
printf("\nCalibration complete.\n\n");
// now output various fusion data every 250 milliseconds
while (shouldRun)
{
float w, x, y, z;
if (bno055_update(sensor))
{
printf("bno055_update() failed.\n");
return 1;
}
bno055_get_euler_angles(sensor, &x, &y, &z);
printf("Euler: Heading: %f Roll: %f Pitch: %f degrees\n",
x, y, z);
bno055_get_quaternions(sensor, &w, &x, &y, &z);
printf("Quaternion: W: %f X: %f Y: %f Z: %f\n",
w, x, y, z);
bno055_get_linear_acceleration(sensor, &x, &y, &z);
printf("Linear Acceleration: X: %f Y: %f Z: %f m/s^2\n",
x, y, z);
bno055_get_gravity_vectors(sensor, &x, &y, &z);
printf("Gravity Vector: X: %f Y: %f Z: %f m/s^2\n",
x, y, z);
printf("\n");
upm_delay_ms(250);
}
//! [Interesting]
printf("Exiting...\n");
bno055_close(sensor);
return 0;
}