Diff: main.cpp

Revision:

1:fe12bf2ad337

Parent:

0:77a366f9ba45

Child:

2:a680194ce6df

--- a/main.cpp	Thu Mar 19 19:25:49 2015 +0000
+++ b/main.cpp	Thu Mar 26 20:58:32 2015 +0000
@@ -1,24 +1,56 @@
 /*
  * Simple DS1820 sensor demo
+ *
+ * Note: Don't forget to connect a 4.7k Ohm resistor 
+ *       between the DS1820's data pin and the +3.3V pin
+ *
  */
  
 #include "mbed.h"
 #include "DS1820.h"
 
 Serial serial(USBTX, USBRX);
-
+ 
 int main() {
-    DS1820  ds1820(PA_9);
-    
-    // detect and initialize DS1820 sensor
+    DS1820  ds1820(PA_9);    // substitute PA_9 with actual mbed pin name connected to the DS1820 data pin    
+                             
     if(ds1820.begin()) {
-        ds1820.startConversion();       // start temperature conversion
-        wait(1.0);                      // wait to complete temperature conversion
+        ds1820.startConversion();
+        wait(1.0);
         while(1) {
-            serial.printf("temp = %3.1f\r\n", ds1820.read());   // read temperature
-            ds1820.startConversion();   // start temperature conversion
-            wait(1.0);                  // wait to complete temperature conversion
+            serial.printf("temp = %3.1f\r\n", ds1820.read());     // read temperature
+            ds1820.startConversion();     // start temperature conversion
+            wait(1.0);                    // let DS1820 complete the temperature conversion
         }
     } else
         serial.printf("No DS1820 sensor found!\r\n");
 }
+
+
+// You can create an array of sensors:
+
+//int main() {
+//    DS1820  ds1820[3] = {DS1820(PA_8), DS1820(PA_9), DS1820(PC_7)};
+//
+//    for(int i = 0; i < 3; i++) {
+//        if(!ds1820[i].begin()) {
+//            serial.printf("Couldn't find sensor %d", i);
+//        } else
+//            ds1820[i].startConversion();
+//    }
+//    
+//    wait(1.0);  // let DS1820s complete the temperature conversion
+//    
+//    while(1) {
+//        for(int i = 0; i < 3; i++) {
+//            serial.printf("temp%d = %3.1f\r\n", i, ds1820[i].read());     // read temperature
+//            ds1820[i].startConversion();     // start temperature conversion
+//        }
+//        wait(1.0);  // let DS1820s complete the temperature conversion
+//    }
+//}               
+                
+                
+                
+                
+                
\ No newline at end of file