Revision 1:5da6f6de3e42, committed 2015-02-16

Comitter:

fossum_13

Date:

Mon Feb 16 01:43:08 2015 +0000

Parent:

0:c1da310d3e8a

Child:

2:282ebbb6d78d

Commit message:

Added documentation and some minor improvements. Not backwards compatible!

Changed in this revision

--- a/Dht11.cpp	Sun Feb 15 02:09:00 2015 +0000
+++ b/Dht11.cpp	Mon Feb 16 01:43:08 2015 +0000
@@ -1,16 +1,15 @@
 #include "Dht11.h"
 
-Dht11::Dht11(PinName p) : _pin(p) {
+Dht11::Dht11(PinName const &p) : _pin(p) {
     // Set creation time so we can make 
     // sure we pause at least 1 second for 
     // startup.
     _timer.start();
+    
+    _temperature = 0;
+    _humidity = 0;
 }
 
-// Return values:
-// DHTLIB_OK
-// DHTLIB_ERROR_CHECKSUM
-// DHTLIB_ERROR_TIMEOUT
 int Dht11::read()
 {
     // BUFFER TO RECEIVE
@@ -77,10 +76,14 @@
     return DHTLIB_OK;
 }
 
-int Dht11::temperature() {
+float Dht11::getFahrenheit() {
+    return((_temperature * 1.8) + 32);
+}
+
+int Dht11::getCelsius() {
     return(_temperature);
 }
 
-int Dht11::humidity() {
+int Dht11::getHumidity() {
     return(_humidity);
 }

--- a/Dht11.h	Sun Feb 15 02:09:00 2015 +0000
+++ b/Dht11.h	Mon Feb 16 01:43:08 2015 +0000
@@ -7,17 +7,67 @@
 #define DHTLIB_ERROR_CHECKSUM   -1
 #define DHTLIB_ERROR_TIMEOUT    -2
 
-class Dht11 {
+/** Class for the DHT11 sensor.
+ * 
+ * Example:
+ * @code
+ * #include "mbed.h"
+ * #include "Dht11.h"
+ *
+ * Serial pc(USBTX, USBRX);
+ * Dht11 sensor(PTD7);
+ * 
+ * int main() {
+ *     sensor.read()
+ *     pc.printf("T: %f, H: %d\r\n", sensor.getFahrenheit(), sensor.getHumidity());
+ * }
+ * @endcode
+ */
+class Dht11
+{
 public:
-    Dht11(PinName p);
+    /** Construct the sensor object.
+     *
+     * @param pin PinName for the sensor pin.
+     */
+    Dht11(PinName const &p);
+    
+    /** Update the humidity and temp from the sensor.
+     *
+     * @returns
+     *   0 on success, otherwise error.
+     */
     int read();
-    int temperature();
-    int humidity();
+    
+    /** Get the temp(f) from the saved object.
+     *
+     * @returns
+     *   Fahrenheit float
+     */
+    float getFahrenheit();
     
+    /** Get the temp(c) from the saved object.
+     *
+     * @returns
+     *   Celsius int
+     */
+    int getCelsius();
+    
+    /** Get the humidity from the saved object.
+     *
+     * @returns
+     *   Humidity percent int
+     */
+    int getHumidity();
+
 private:
+    /// percentage of humidity
     int _humidity;
+    /// celsius
     int _temperature;
+    /// pin to read the sensor info on
     DigitalInOut _pin;
+    /// times startup (must settle for at least a second)
     Timer _timer;
 };