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LEDUtil.cpp
00001 #include "mbed.h" 00002 #include "LEDUtil.h" 00003 00004 #define PIN_HIGH 1 00005 #define PIN_LOW 0 00006 00007 LEDUtil::LEDUtil(PinName targetPinName, LEDUtil::Polarity targetPinPolarity) 00008 { 00009 this->pinName = targetPinName; 00010 this->polarity = targetPinPolarity; 00011 } 00012 00013 00014 void LEDUtil::setLedState(LedState state) 00015 { 00016 DigitalOut pin(pinName); 00017 00018 if (state == LEDUtil::LED_ON) { 00019 // turns on the LED 00020 pin.write((polarity == LEDUtil::HIGH_ON_LOW_OFF) ? PIN_HIGH : PIN_LOW); 00021 } else { 00022 // turns off the LED 00023 pin.write((polarity == LEDUtil::HIGH_ON_LOW_OFF) ? PIN_LOW : PIN_HIGH); 00024 } 00025 } 00026 00027 void LEDUtil::turnOn() 00028 { 00029 LEDUtil::setLedState(LEDUtil::LED_ON); 00030 } 00031 00032 void LEDUtil::turnOff() 00033 { 00034 LEDUtil::setLedState(LEDUtil::LED_OFF); 00035 } 00036 00037 bool LEDUtil::isOn() 00038 { 00039 if (getLedState() == LEDUtil::LED_ON) { 00040 return true; 00041 } else { 00042 return false; 00043 } 00044 } 00045 00046 bool LEDUtil::isOff() 00047 { 00048 return (!LEDUtil::isOn()); 00049 } 00050 00051 LEDUtil::LedState LEDUtil::getLedState() 00052 { 00053 DigitalOut pin(pinName); 00054 LedState state = LEDUtil::LED_OFF; 00055 00056 if (pin.read() == PIN_HIGH) { 00057 state = ((polarity == LEDUtil::HIGH_ON_LOW_OFF) ? LEDUtil::LED_ON : LEDUtil::LED_OFF); 00058 } else { 00059 state = ((polarity == LEDUtil::LOW_ON_HIGH_OFF) ? LEDUtil::LED_OFF : LEDUtil::LED_ON); 00060 } 00061 00062 return state; 00063 } 00064
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