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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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49
examples/c++/m24lr64e.cxx
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@ -22,44 +22,45 @@
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <unistd.h>
#include <iostream>
#include <stdio.h>
#include "m24lr64e.hpp"
using namespace std;
using namespace upm;
int main(int argc, char **argv)
int
main(int argc, char** argv)
{
//! [Interesting]
// Instantiate an M24LR64E on I2C bus 0
//! [Interesting]
// Instantiate an M24LR64E on I2C bus 0
upm::M24LR64E *nfcTag = new upm::M24LR64E(M24LR64E_I2C_BUS);
upm::M24LR64E nfcTag(M24LR64E_I2C_BUS);
// This example accesses the device in the 'user' (default) mode,
// reads the last byte of data in the EEPROM, inverts it, writes
// it back, and then re-reads it.
// This example accesses the device in the 'user' (default) mode,
// reads the last byte of data in the EEPROM, inverts it, writes
// it back, and then re-reads it.
// Read the last byte of the EEPROM area
// Read the last byte of the EEPROM area
int addr = M24LR64E::EEPROM_I2C_LENGTH - 1;
printf("Address: %d\n", addr);
uint8_t byte = nfcTag->readByte(addr);
printf("Read byte: %02x\n", byte);
int addr = M24LR64E::EEPROM_I2C_LENGTH - 1;
printf("Address: %d\n", addr);
uint8_t byte = nfcTag.readByte(addr);
printf("Read byte: %02x\n", byte);
// Now change it to it's opposite and write it
byte = ~byte;
nfcTag->writeByte(addr, byte);
printf("Wrote inverted byte: %02x\n", byte);
// Now change it to it's opposite and write it
byte = ~byte;
nfcTag.writeByte(addr, byte);
printf("Wrote inverted byte: %02x\n", byte);
// Now read it back.
byte = nfcTag->readByte(addr);
printf("Read byte: %02x\n", byte);
// Now read it back.
byte = nfcTag.readByte(addr);
printf("Read byte: %02x\n", byte);
//! [Interesting]
//! [Interesting]
cout << "Exiting..." << endl;
cout << "Exiting..." << endl;
delete nfcTag;
return 0;
return 0;
}