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hp20x: throw exception(s) on fatal errors

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Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
This commit is contained in:
Jon Trulson 2015-09-10 12:14:39 -06:00 committed by Mihai Tudor Panu
parent fb779ecd6a
commit 9421cdaf30
1 changed files with 17 additions and 37 deletions
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54
src/hp20x/hp20x.cxx
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@ -26,6 +26,7 @@
#include <math.h>
#include <iostream>
#include <string>
#include <stdexcept>
#include "hp20x.h"
@ -41,8 +42,8 @@ HP20X::HP20X(int bus, uint8_t address):
mraa::Result rv;
if ( (rv = m_i2c.address(m_addr)) != mraa::SUCCESS)
{
cerr << "HP20X: Could not initialize i2c address. " << endl;
printError(rv);
throw std::invalid_argument(std::string(__FUNCTION__) +
": I2c.address() failed");
return;
}
}
@ -90,8 +91,8 @@ bool HP20X::waitforDeviceReady()
retries++;
}
cerr << __FUNCTION__ << ": timeout waiting for device to become ready"
<< endl;
throw std::runtime_error(std::string(__FUNCTION__) +
": timeout waiting for device to become ready");
return false;
}
@ -101,7 +102,8 @@ bool HP20X::writeCmd(uint8_t cmd)
mraa::Result rv;
if ((rv = m_i2c.writeByte(cmd)) != mraa::SUCCESS)
{
printError(rv);
throw std::runtime_error(std::string(__FUNCTION__) +
": I2c.writeByte() failed");
return false;
}
@ -117,7 +119,8 @@ bool HP20X::writeReg(HP20X_REG_T reg, uint8_t data)
mraa::Result rv;
if ((rv = m_i2c.writeReg(r, data)) != mraa::SUCCESS)
{
cerr << __FUNCTION__ << ": writeReg failed" << endl;
throw std::runtime_error(std::string(__FUNCTION__) +
": I2c.writeReg() failed");
return false;
}
@ -137,7 +140,8 @@ int HP20X::readData()
if (!m_i2c.read(buf, 3))
{
cerr << __FUNCTION__ << ": read failed" << endl;
throw std::runtime_error(std::string(__FUNCTION__) +
": I2c.read() failed");
return 0;
}
@ -160,21 +164,13 @@ float HP20X::getTemperature()
// start conversion, T only
uint8_t cmd = CMD_ADC_CVT | (CHNL_T << CHNL_SHIFT) | (m_dsr << DSR_SHIFT);
if (!writeCmd(cmd))
{
cerr << __FUNCTION__ << ": writeCmd failed" << endl;
return 0;
}
writeCmd(cmd);
// wait for the device to report ready
waitforDeviceReady();
// now read the temperature
if (!writeCmd(CMD_READ_T))
{
cerr << __FUNCTION__ << ": writeCmd failed" << endl;
return 0;
}
writeCmd(CMD_READ_T);
return ((float)readData() / 100.0);
}
@ -186,21 +182,13 @@ float HP20X::getPressure()
// start conversion, PT only
uint8_t cmd = CMD_ADC_CVT | (CHNL_PT << CHNL_SHIFT) | (m_dsr << DSR_SHIFT);
if (!writeCmd(cmd))
{
cerr << __FUNCTION__ << ": writeCmd failed" << endl;
return 0;
}
writeCmd(cmd);
// wait for the device to report ready
waitforDeviceReady();
// now read the pressure
if (!writeCmd(CMD_READ_P))
{
cerr << __FUNCTION__ << ": writeCmd failed" << endl;
return 0;
}
writeCmd(CMD_READ_P);
return ((float)readData() / 100.0);
}
@ -212,21 +200,13 @@ float HP20X::getAltitude()
// start conversion, PT only
uint8_t cmd = CMD_ADC_CVT | (CHNL_PT << CHNL_SHIFT) | (m_dsr << DSR_SHIFT);
if (!writeCmd(cmd))
{
cerr << __FUNCTION__ << ": writeCmd failed" << endl;
return 0;
}
writeCmd(cmd);
// wait for the device to report ready
waitforDeviceReady();
// now read the pressure
if (!writeCmd(CMD_READ_A))
{
cerr << __FUNCTION__ << ": writeCmd failed" << endl;
return 0;
}
writeCmd(CMD_READ_A);
return ((float)readData() / 100.0);
}