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examples: Remove heap allocation from C++ examples

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Cleanup of UPM C++ examples.  Switched from heap allocation to
stack allocation when possible.  This simplifies the samples since it
removes the need for explicit memory management.  A script was used to
identify and replace pointer use.  To simplify the replace script, I
re-formatted the C++ examples using the UPM .clang-format file.
Unfortuantely this changes the look of the UPM C++ examples to a large
degree.  However, examples will now have a standard look/feel and
uniform formatting.

    * Ran clang-format w/provided UPM .clang-format file
    * Removed new's/delete's whenever possible (left those in interface
      examples)
    * Added IIO sensor library implementation of callback void* arg
    * Converted all sleeps to upm defined delays (added header when
      necessary)
    * Scrubbed CXX example includes

Signed-off-by: Noel Eck <noel.eck@intel.com>
This commit is contained in:
Noel Eck
2017-08-30 15:00:29 -07:00
committed by Mihai Tudor Panu
parent bd6e4ec786
commit 5cefe7f5f3
290 changed files with 7976 additions and 8520 deletions
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65
examples/c++/pca9685.cxx
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@ -22,57 +22,56 @@
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <unistd.h>
#include <signal.h>
#include <iostream>
#include "pca9685.hpp"
#include "upm_utilities.h"
using namespace std;
int main(int argc, char **argv)
int
main(int argc, char** argv)
{
//! [Interesting]
// Instantiate an PCA9685 on I2C bus 0
//! [Interesting]
// Instantiate an PCA9685 on I2C bus 0
upm::PCA9685 *leds = new upm::PCA9685(PCA9685_I2C_BUS,
PCA9685_DEFAULT_I2C_ADDR);
upm::PCA9685 leds(PCA9685_I2C_BUS, PCA9685_DEFAULT_I2C_ADDR);
// put device to sleep
leds->setModeSleep(true);
// put device to upm_delay
leds.setModeSleep(true);
// setup a period of 50Hz
leds->setPrescaleFromHz(50);
// wake device up
leds->setModeSleep(false);
// setup a period of 50Hz
leds.setPrescaleFromHz(50);
// Setup a 50% duty cycle -- on time at 0, off time at 2048 (4096 / 2)
// Set for all channels
// wake device up
leds.setModeSleep(false);
leds->ledOnTime(PCA9685_ALL_LED, 0);
leds->ledOffTime(PCA9685_ALL_LED, 2048);
// Setup a 50% duty cycle -- on time at 0, off time at 2048 (4096 / 2)
// Set for all channels
// but, turn channel 3 full off and channel 4 full on
leds.ledOnTime(PCA9685_ALL_LED, 0);
leds.ledOffTime(PCA9685_ALL_LED, 2048);
cout << "Turning channel 3 off, and channel 4 on." << endl;
cout << "All other channels will be PWM'd at a 50% duty cycle." << endl;
// but, turn channel 3 full off and channel 4 full on
leds->ledFullOff(3, true);
leds->ledFullOn(4, true);
cout << "Turning channel 3 off, and channel 4 on." << endl;
cout << "All other channels will be PWM'd at a 50% duty cycle." << endl;
// now, just sleep for 5 seconds, reset channels 3 and 4, and exit.
cout << "Sleeping for 5 seconds..." << endl;
leds.ledFullOff(3, true);
leds.ledFullOn(4, true);
sleep(5);
// now, just upm_delay for 5 seconds, reset channels 3 and 4, and exit.
cout << "Sleeping for 5 seconds..." << endl;
cout << "Exiting..." << endl;
upm_delay(5);
// clear the bits we set earlier
leds->ledFullOff(3, false);
leds->ledFullOn(4, false);
cout << "Exiting..." << endl;
//! [Interesting]
// clear the bits we set earlier
leds.ledFullOff(3, false);
leds.ledFullOn(4, false);
delete leds;
return 0;
//! [Interesting]
return 0;
}