Diff: ACS712.h

Revision:

3:9cae7baf7ccd

Parent:

2:2b5233355986

Child:

4:f6c160553ca3

--- a/ACS712.h	Sun Mar 13 16:51:20 2016 +0000
+++ b/ACS712.h	Sun Mar 13 17:14:35 2016 +0000
@@ -1,12 +1,57 @@
 #include <mbed.h>
-
+/** A Hall-Effect sensor for measuring current levels in a given path
+ *
+ * Can be used as a current detector
+ *
+ * Example:
+ * @code
+ * // Periodically read current levels in a circuit and
+ * // send output to PC terminal
+ *
+ * #include "mbed.h"
+ * #include "ACS712.h"
+ *
+ * // Connect the sensor analog output pin to mbed's AnalogIn pin
+ * ACS712 dev(p18);
+ * // Connect mbed to pc's USB port
+ * Serial pc(USBTX, USBRX);
+ *
+ * int main() {
+ *      pc.printf("Sensor Log: \n\n\r");
+ *      while (1) {
+ *          // Read current from sensor and output to pc terminal
+ *          pc.printf("Sensor Value: %2.2f A\n\r", dev);
+ *          wait(0.200);
+ *      }
+ * }
+ * @endcode
+ */
+ 
 class ACS712 { 
     
     public:
+        /** Create a hall-effect sensor of the specified type
+         *
+         * @param _pin mbed AnalogIn pin where the analog output of sensor is connected
+         * @param voltDivRatio resistor voltage division ratio at output of the sensor
+         * @param type type of ACS712 sensor used
+         *
+         * @note Supported types of sensors:
+         */
         ACS712(PinName _pin, float voltDivRatio = 1, short type = 5);
         
+        /** Read the value of the measured current in amps
+         *
+         * @return current value in amps
+         */
         float read();
         float operator=(ACS712&);
+        
+        /** Read the value of the measured current in amps
+         *  Allows the ACS712 object to be used in a float context
+         * 
+         * @return current value in amps
+         */
         operator float() { return read(); }
         
     private: