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examples: Remove heap allocation from C++ examples

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Small cleanup of MRAA C++ examples.  Switched from heap allocation to
stack allocation when possible.  This simplifies the samples since it
removes the need for explicit memory management.

Signed-off-by: Noel Eck <noel.eck@intel.com>
This commit is contained in:
Noel Eck
2017-08-08 13:55:23 -07:00
parent d50b646c35
commit 1217c5c034
7 changed files with 29 additions and 47 deletions
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20
examples/c++/I2c-compass.cpp
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@@ -99,28 +99,27 @@ main()
uint8_t rx_tx_buf[MAX_BUFFER_LENGTH];
//! [Interesting]
mraa::I2c* i2c;
i2c = new mraa::I2c(0);
mraa::I2c i2c(0);
i2c->address(HMC5883L_I2C_ADDR);
i2c.address(HMC5883L_I2C_ADDR);
rx_tx_buf[0] = HMC5883L_CONF_REG_B;
rx_tx_buf[1] = GA_1_3_REG;
i2c->write(rx_tx_buf, 2);
i2c.write(rx_tx_buf, 2);
//! [Interesting]
i2c->address(HMC5883L_I2C_ADDR);
i2c.address(HMC5883L_I2C_ADDR);
rx_tx_buf[0] = HMC5883L_MODE_REG;
rx_tx_buf[1] = HMC5883L_CONT_MODE;
i2c->write(rx_tx_buf, 2);
i2c.write(rx_tx_buf, 2);
signal(SIGINT, sig_handler);
while (running == 0) {
i2c->address(HMC5883L_I2C_ADDR);
i2c->writeByte(HMC5883L_DATA_REG);
i2c.address(HMC5883L_I2C_ADDR);
i2c.writeByte(HMC5883L_DATA_REG);
i2c->address(HMC5883L_I2C_ADDR);
i2c->read(rx_tx_buf, DATA_REG_SIZE);
i2c.address(HMC5883L_I2C_ADDR);
i2c.read(rx_tx_buf, DATA_REG_SIZE);
x = (rx_tx_buf[HMC5883L_X_MSB_REG] << 8) | rx_tx_buf[HMC5883L_X_LSB_REG];
z = (rx_tx_buf[HMC5883L_Z_MSB_REG] << 8) | rx_tx_buf[HMC5883L_Z_LSB_REG];
@@ -138,7 +137,6 @@ main()
printf("Heading : %f\n", direction * 180 / M_PI);
sleep(1);
}
delete i2c;
return MRAA_SUCCESS;
}