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ds1307: 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 16:05:08 -06:00
committed by Mihai Tudor Panu
parent 3d837284fd
commit 78d940aaf5
2 changed files with 29 additions and 28 deletions
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44
src/ds1307/ds1307.cxx
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@@ -27,6 +27,7 @@
#include <iostream>
#include <string>
#include <stdexcept>
#include "ds1307.h"
@@ -34,20 +35,15 @@ using namespace upm;
using namespace std;
DS1307::DS1307(int bus)
DS1307::DS1307(int bus) : m_i2c(bus)
{
// setup our i2c link
m_i2c = mraa_i2c_init(bus);
mraa_result_t ret = mraa_i2c_address(m_i2c, DS1307_I2C_ADDR);
if (ret != MRAA_SUCCESS)
cerr << "DS1307: Could not initialize i2c bus. " << endl;
}
DS1307::~DS1307()
{
mraa_i2c_stop(m_i2c);
mraa::Result ret = m_i2c.address(DS1307_I2C_ADDR);
if (ret != mraa::SUCCESS){
throw std::invalid_argument(std::string(__FUNCTION__) +
": i2c.address() failed");
return;
}
}
mraa::Result DS1307::writeBytes(uint8_t reg, uint8_t *buffer, int len)
@@ -65,9 +61,14 @@ mraa::Result DS1307::writeBytes(uint8_t reg, uint8_t *buffer, int len)
for (int i=1; i<(len + 1); i++)
buf2[i] = buffer[i-1];
mraa_i2c_address(m_i2c, DS1307_I2C_ADDR);
mraa::Result ret = m_i2c.address(DS1307_I2C_ADDR);
if (ret != mraa::SUCCESS){
throw std::invalid_argument(std::string(__FUNCTION__) +
": i2c.address() failed");
return ret;
}
return (mraa::Result) mraa_i2c_write(m_i2c, buf2, len + 1);
return m_i2c.write(buf2, len + 1);
}
int DS1307::readBytes(uint8_t reg, uint8_t *buffer, int len)
@@ -75,10 +76,15 @@ int DS1307::readBytes(uint8_t reg, uint8_t *buffer, int len)
if (!len || !buffer)
return 0;
mraa_i2c_address(m_i2c, DS1307_I2C_ADDR);
mraa_i2c_write_byte(m_i2c, reg);
mraa::Result ret = m_i2c.address(DS1307_I2C_ADDR);
if (ret != mraa::SUCCESS){
throw std::invalid_argument(std::string(__FUNCTION__) +
": i2c.address() failed");
return 0;
}
m_i2c.writeByte(reg);
return mraa_i2c_read(m_i2c, buffer, len);
return m_i2c.read(buffer, len);
}
bool DS1307::loadTime()
@@ -90,8 +96,8 @@ bool DS1307::loadTime()
if (bytesRead != 7)
{
// problem
cerr << __FUNCTION__ << ": read " << bytesRead <<
" bytes, expected 7." << endl;
throw std::runtime_error(std::string(__FUNCTION__) +
": failed to read expected 7 bytes from device");
return false;
}