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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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47
examples/c++/mg811.cxx
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@ -22,47 +22,48 @@
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <unistd.h>
#include <iostream>
#include <signal.h>
#include "mg811.hpp"
#include "upm_utilities.h"
using namespace std;
bool shouldRun = true;
#define MG811_AREF 5.0
#define MG811_AREF 5.0
void sig_handler(int signo)
void
sig_handler(int signo)
{
if (signo == SIGINT)
shouldRun = false;
if (signo == SIGINT)
shouldRun = false;
}
int main()
int
main()
{
signal(SIGINT, sig_handler);
signal(SIGINT, sig_handler);
//! [Interesting]
//! [Interesting]
// Instantiate an MG811 on analog pin A0, and digital pin D2 with an
// analog reference voltage of MG811_AREF (5.0)
upm::MG811 *sensor = new upm::MG811(0, 2, MG811_AREF);
// Every tenth of a second, sample the sensor and output it's
// detected CO2 concentration in parts per million (ppm)
// Instantiate an MG811 on analog pin A0, and digital pin D2 with an
// analog reference voltage of MG811_AREF (5.0)
upm::MG811 sensor(0, 2, MG811_AREF);
while (shouldRun)
{
cout << "CO2 concentration in PPM: " << sensor->ppm() << endl;
usleep(100000);
// Every tenth of a second, sample the sensor and output it's
// detected CO2 concentration in parts per million (ppm)
while (shouldRun) {
cout << "CO2 concentration in PPM: " << sensor.ppm() << endl;
upm_delay_us(100000);
}
//! [Interesting]
//! [Interesting]
cout << "Exiting" << endl;
cout << "Exiting" << endl;
delete sensor;
return 0;
return 0;
}