Revision 0:3c77443bfb5b, committed 2015-07-31

Comitter:

coisme

Date:

Fri Jul 31 23:26:36 2015 +0000

Child:

1:220396a0cb8a

Commit message:

First commit.

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LEDUtil.cpp	Fri Jul 31 23:26:36 2015 +0000
@@ -0,0 +1,57 @@
+#include "mbed.h"
+#include "LEDUtil.h"
+
+#define PIN_HIGH  1
+#define PIN_LOW   0
+
+LEDUtil::LEDUtil(PinName targetPinName, LEDUtil::Polarity targetPinPolarity) {
+    this->pinName = targetPinName;
+    this->polarity = targetPinPolarity;
+}    
+
+ 
+void LEDUtil::setLedState(LedState state) {
+    DigitalOut pin(pinName);
+    
+    if (state == LEDUtil::LED_ON) {
+        // turns on the LED
+        pin.write((polarity == LEDUtil::HIGH_ON_LOW_OFF) ? PIN_HIGH : PIN_LOW);
+    } else {
+        // turns off the LED
+        pin.write((polarity == LEDUtil::HIGH_ON_LOW_OFF) ? PIN_LOW : PIN_HIGH);
+    }
+}
+
+void LEDUtil::turnOn() {
+    LEDUtil::setLedState(LEDUtil::LED_ON);
+}
+
+void LEDUtil::turnOff() {
+    LEDUtil::setLedState(LEDUtil::LED_OFF);
+}
+
+bool LEDUtil::isOn() {
+    if (getLedState() == LEDUtil::LED_ON) {
+        return true;
+    } else {
+        return false;
+    }
+}
+
+bool LEDUtil::isOff() {
+    return (!LEDUtil::isOn());
+}
+
+LEDUtil::LedState LEDUtil::getLedState() {
+    DigitalOut pin(pinName);
+    LedState state = LEDUtil::LED_OFF;
+        
+    if (pin.read() == PIN_HIGH) {
+        state = ((polarity == LEDUtil::HIGH_ON_LOW_OFF) ? LEDUtil::LED_ON : LEDUtil::LED_OFF);
+    } else {
+        state = ((polarity == LEDUtil::LOW_ON_HIGH_OFF) ? LEDUtil::LED_OFF : LEDUtil::LED_ON);
+    }
+    
+    return state;
+}
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LEDUtil.h	Fri Jul 31 23:26:36 2015 +0000
@@ -0,0 +1,100 @@
+#ifndef __LEDUTIL_H__
+#define __LEDUTIL_H__
+
+/**
+ * A simple class to handle LED.
+ *
+ * Example (tested on BLENano):
+ * @code
+ * #include "mbed.h"
+ * #include "LEDUtil.h"
+ *
+ * // LED is connected to P0_19 on BLENano and it lights up when the pin state is high.
+ * #define LED_PIN_NAME   P0_19  
+ *
+ * void main() {
+ *     LEDUtil led1(P0_19, LEDUtil::HIGH_ON_LOW_OFF);
+ *   
+ *     while(true) {
+ *         led1.turnOn();
+ *         wait(0.5);
+ *         led1.turnOff();
+ *         wait(0.5);
+ *     }
+ * }
+ * @endcode
+ */
+class LEDUtil {
+
+    public:
+    
+    /** Polarity of LED's configuration. */
+    typedef enum {
+        /** The target LED lights up when the pin level is high. */
+        HIGH_ON_LOW_OFF,
+        /** The target LED lights up when the pin level is low. */
+        LOW_ON_HIGH_OFF  
+    } Polarity;
+    
+    /**
+     * Constructor.
+     *
+     * @param targetPinName pin name of the target pin which is coneccted with the target LED.
+     * @param targetPinPolarity pin polarity of the target. The default value is POLARITY_HIGH_ON_LOW_OFF
+     */
+    LEDUtil(PinName targetPinName, Polarity targetPinPolarity = HIGH_ON_LOW_OFF);
+
+    /**
+     * Turns on the LED.
+     */
+    void turnOn();
+    
+    /**
+     * Turns off the LED.
+     */
+    void turnOff();
+    
+    /**
+     * Returns if the LED is on.
+     * @return Returns true if the LED is on. Otherwise returns false.
+     */
+    bool isOn();
+    
+    /**
+     * Returns if the LED is off.
+     * @return Returns true if the LED is off. Otherwise returns false.
+     */
+    bool isOff(); 
+    
+    /**
+     * Get polarity setting.
+     * @return polarity setting of this LED configuration.
+     */
+    Polarity getPolarity();
+
+
+    private:
+    
+    /* Holds the target LED's pin name. */
+    PinName pinName;
+    
+    /* Holds polarity of the target LED pin. */
+    Polarity polarity;
+      
+    /* State of the LED, i.e. on or off. */
+    typedef enum {LED_ON, LED_OFF} LedState;
+
+    /*
+     * Sets the LED state.
+     * @param state LED state to be set.
+     */
+    void setLedState(LedState state);
+    
+    /*
+     * Gets the LED state.
+     * @return Returns LED state.
+     */
+    LedState getLedState();
+};
+
+#endif
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