Diff: DHT11.h

Revision:

9:056d1e9b428c

Parent:

5:da586c935e88

Child:

10:f0d789f49df7

--- a/DHT11.h	Wed Sep 10 18:00:31 2014 +0000
+++ b/DHT11.h	Thu Sep 11 13:45:00 2014 +0000
@@ -28,7 +28,7 @@
  */
 
 class DHT11
-{
+{   
 public:
     /** Create a DHT11 interface
      * @param pin 1-wire-like serial I/O port of DHT11
@@ -49,20 +49,20 @@
     int readData(void);
 
     /** Reading the humidity from the data
-     * @return Humidity in % if readData() returns no error.
-     * Otherwise, returns 0xffffffff.
+     * @return Humidity in %,
+     * regardless of the error from readData()
      */
     int readHumidity(void);
 
     /** Reading the temperature from the data
-     * @return Temperature in Celcius if readData() returns no error.
-     * Otherwise, returns 0xffffffff.
+     * @return Temperature in Celcius,
+     * regardless of the error from readData()
      */
     int readTemperature(void);
 
     enum ErrorDHT11 {
         OK = 0,
-        TOO_FAST_READ = 1,
+        READ_TOO_OFTEN = 1,
         BUS_BUSY = 2,
         NOT_PRESENT = 3,
         NOT_READY = 4,
@@ -75,13 +75,14 @@
     InterruptIn io_irq;
     Timer t;
     uint32_t t_pulse_us;
+    const static int t_tol_start;    
+    const static int t_tol_pulse;
     bool first_time;
     uint64_t data;
     uint32_t chksum;
     uint32_t cnt;
     uint32_t wdt;
     bool eod;
-    ErrorDHT11 err;
     void init(void);
     void pos_edge(void);
     void neg_edge(void);