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adxl345: 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 2015-09-09 15:19:30 -06:00 committed by Mihai Tudor Panu
parent f86e812f13
commit da49741527
1 changed files with 25 additions and 5 deletions
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30
src/adxl345/adxl345.cxx
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@ -23,6 +23,8 @@
*/ */
#include <iostream> #include <iostream>
#include <string>
#include <stdexcept>
#include <unistd.h> #include <unistd.h>
#include "math.h" #include "math.h"
#include "adxl345.h" #include "adxl345.h"
@ -87,16 +89,34 @@ using namespace upm;
Adxl345::Adxl345(int bus) : m_i2c(bus) Adxl345::Adxl345(int bus) : m_i2c(bus)
{ {
//reset chip //init bus and reset chip
m_i2c.address(ADXL345_I2C_ADDR); if ( m_i2c.address(ADXL345_I2C_ADDR) != mraa::SUCCESS ){
throw std::invalid_argument(std::string(__FUNCTION__) +
": i2c.address() failed");
return;
}
m_buffer[0] = ADXL345_POWER_CTL; m_buffer[0] = ADXL345_POWER_CTL;
m_buffer[1] = ADXL345_POWER_ON; m_buffer[1] = ADXL345_POWER_ON;
m_i2c.write(m_buffer, 2); if( m_i2c.write(m_buffer, 2) != mraa::SUCCESS){
throw std::runtime_error(std::string(__FUNCTION__) +
": i2c.write() control register failed");
return;
}
if ( m_i2c.address(ADXL345_I2C_ADDR) != mraa::SUCCESS ){
throw std::invalid_argument(std::string(__FUNCTION__) +
": i2c.address() failed");
return;
}
m_i2c.address(ADXL345_I2C_ADDR);
m_buffer[0] = ADXL345_DATA_FORMAT; m_buffer[0] = ADXL345_DATA_FORMAT;
m_buffer[1] = ADXL345_16G | ADXL345_FULL_RES; m_buffer[1] = ADXL345_16G | ADXL345_FULL_RES;
m_i2c.write(m_buffer, 2); if( m_i2c.write(m_buffer, 2) != mraa::SUCCESS){
throw std::runtime_error(std::string(__FUNCTION__) +
": i2c.write() mode register failed");
return;
}
//2.5V sensitivity is 256 LSB/g = 0.00390625 g/bit //2.5V sensitivity is 256 LSB/g = 0.00390625 g/bit
//3.3V x and y sensitivity is 265 LSB/g = 0.003773584 g/bit, z is the same //3.3V x and y sensitivity is 265 LSB/g = 0.003773584 g/bit, z is the same