Diff: Shinyei.h

Revision:

0:995d42a37328

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Shinyei.h	Thu Jan 26 15:07:26 2017 +0000
@@ -0,0 +1,56 @@
+/*!
+ * Shinyei.cpp
+ *
+ * Read the particle concentration using a Shinyei PPD42NJ sensor
+ *
+ * Copyright (c) 2017 -  Alexandre Bouillot github.com/abouillot
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documnetation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to  whom the Software is
+ * furished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS OR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+ 
+#include "mbed.h"
+#include "PwmReader.h"
+
+class Shinyei
+{
+public:
+    Shinyei(PinName pin) : _pwm(pin), _dataReady(false) {
+    };
+    void startSampling(int duration = 30);
+    void startSampling(Callback< void()>, int duration = 30);
+    void stopSampling();
+    bool dataReady() {
+        return _dataReady;
+    };
+    float concentration() {
+        if (_dataReady)
+            return _concentration;
+        else
+            return -1;
+    };
+private:
+    void samplingComplete();
+    void init();
+    PwmReader _pwm;
+    bool _dataReady;
+    Timeout _samplingTimer;
+    float _concentration;
+    Callback<void()> _callback;
+    bool _callbackSet;
+};
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