Diff: TmpLM74.h

Revision:

0:9293a89e30e2

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/TmpLM74.h	Thu Mar 10 18:23:12 2011 +0000
@@ -0,0 +1,97 @@
+/* mbed tmpLM74 Library, for a LM74 based digital thermometer
+ * Copyright (c) 2011, atpolitis, http://mbed.org
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation 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
+ * furnished 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 FOR 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.
+ */
+
+#ifndef MBED_TMPLM74_H
+#define MBED_TMPLM74_H
+
+#include "mbed.h"
+
+#define INVALID_LM74_TEMP   0X961
+#define MAX_LM74_TEMP       (INVALID_LM74_TEMP-1)*0.0625
+
+/** An LM74 based digital thermometer
+ *
+ * Currently supports SPI peripheral interface
+ *
+ * @code
+ * #include "mbed.h"
+ * #include "tmpLM74.h"
+ * 
+ * Serial pc(USBTX, USBRX); // tx, rx
+ * DigitalOut myled(LED1);
+ *
+ * TmpLM74 Temp74(p5, p6, p7, p8);
+ *
+ * //   mbed connections:
+ * //                       mosi(p5) to LM74 pin 1, through 10k
+ * //                       miso(p6) to LM74 pin 1
+ * //                       sclk(p7) to LM74 pin 2
+ * //                       miso(p8) to LM74 pin 7
+ *
+ * //TmpLM74.startLM74();       // CAN be used, but NOT necessary (invoked within readTemp(), if needed)
+ *
+ * int main() {
+ *
+ *      float TempC;
+ *
+ *      pc.printf("HELLO!,  testing LM74 temperature sensor ...\n\r");
+ *
+ *      for (int i = 0; i < 10; i++){
+ *          wait(2);
+ *          TempC = Temp74.readTemp();
+ *          pc.printf("Temperature = ");
+ *          if(TempC > MAX_LM74_TEMP) {         // check whether temp is valid
+ *              pc.printf(" ? *C\n", TempC);
+ *          } else {
+ *              pc.printf("%3.1f *C\n", TempC);
+ *          }
+ *          myled = !myled;
+ *      }
+ *      Temp74.shutLM74down();
+ *      while(1){
+ *          wait(1);
+ *          myled = !myled;
+ *      }
+ * }
+ * @endcode
+ */
+//  ********************************************************************
+//      in this version, class TmpLM74 is derived from class SPI
+//      and inherits its members
+//
+//  ********************************************************************
+
+class TmpLM74: public SPI {
+
+    public:
+    
+        TmpLM74(PinName mosi, PinName miso, PinName sclk, PinName csLM74);
+        
+        float readTemp(void);
+        void startLM74(void);
+        void shutLM74down(void);
+        
+    protected:
+        DigitalOut _csLM74;
+};
+
+#endif
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