diff --git a/src/groveelectromagnet/groveelectromagnet.cxx b/src/groveelectromagnet/groveelectromagnet.cxx index 9ff82a89..d3e118da 100644 --- a/src/groveelectromagnet/groveelectromagnet.cxx +++ b/src/groveelectromagnet/groveelectromagnet.cxx @@ -22,13 +22,21 @@ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ +#include +#include + #include "groveelectromagnet.h" using namespace upm; GroveElectromagnet::GroveElectromagnet(int pin) { - m_gpio = mraa_gpio_init(pin); + if ( !(m_gpio = mraa_gpio_init(pin)) ) + { + throw std::invalid_argument(std::string(__FUNCTION__) + + ": mraa_gpio_init() failed, invalid pin?"); + return; + } mraa_gpio_dir(m_gpio, MRAA_GPIO_OUT); }