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max31855: 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 14:07:57 -06:00 committed by Mihai Tudor Panu
parent 6db7dfd3d9
commit d0d89b579d
1 changed files with 8 additions and 1 deletions
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9
src/max31855/max31855.cxx
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@ -23,6 +23,8 @@
*/ */
#include <iostream> #include <iostream>
#include <string>
#include <stdexcept>
#include <unistd.h> #include <unistd.h>
#include <stdlib.h> #include <stdlib.h>
#include <functional> #include <functional>
@ -36,7 +38,12 @@ using namespace upm;
MAX31855::MAX31855(int bus, int cs) MAX31855::MAX31855(int bus, int cs)
{ {
// initialise chip select as a normal gpio // initialise chip select as a normal gpio
m_gpio = mraa_gpio_init(cs); if ( !(m_gpio = mraa_gpio_init(cs)) )
{
throw std::invalid_argument(std::string(__FUNCTION__) +
": mraa_gpio_init(cs) failed, invalid pin?");
return;
}
mraa_gpio_dir(m_gpio, MRAA_GPIO_OUT); mraa_gpio_dir(m_gpio, MRAA_GPIO_OUT);
// initialise the spi bus with a 2Mhz clock // initialise the spi bus with a 2Mhz clock