Andy Gish / Mbed 2 deprecated OneWireCRC

Now supports DS18B20 and DS18S20 Maxim/Dallas one-wire thermometer devices. Also supports DS18S20 in 9, 10, 11, and 12 bit resolution modes. 'Use Address' mode now checks if the correct device type is present, and informs the user which device to use. Correct temperature conversion times now used in non-parasitic mode. The device should be placed at least 6 inches (15 cm) from the mbed board in order to accurately read ambient temperature.

Dependencies:   mbed

Fork of OneWireCRC by Petras Saduikis

Files at this revision

API Documentation at this revision

Revision 1:ade3fad22621, committed 2015-07-13

Comitter:
lagish
Date:
Mon Jul 13 17:22:49 2015 +0000
Parent:
0:01a6a40578c9
Commit message:
Draft1

Changed in this revision

DS18B20.cpp Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file 
diff -r 01a6a40578c9 -r ade3fad22621 DS18B20.cpp
--- a/DS18B20.cpp	Sun Jan 03 11:57:31 2010 +0000
+++ b/DS18B20.cpp	Mon Jul 13 17:22:49 2015 +0000
@@ -95,7 +95,7 @@
             pc_ds18B20.traceOut("12 bit resolution ...\r\n");
             break;
     }
-    float realTemp = (float)read_temp/16 ;
+    float realTemp = (float)read_temp/16*9/5+32 ;
                  
     pc_ds18B20.traceOut("TEMP_READ/REAL TEMP: %f \r\n", realTemp); 
                

diff -r 01a6a40578c9 -r ade3fad22621 main.cpp
--- a/main.cpp	Sun Jan 03 11:57:31 2010 +0000
+++ b/main.cpp	Mon Jul 13 17:22:49 2015 +0000
@@ -29,6 +29,8 @@
 #include "DS18B20.h"
 #include "OneWireDefs.h"
 
+DigitalOut myled(LED1);
+
 //#define THERMOMETER DS18S20
 #define THERMOMETER DS18B20
 
@@ -38,21 +40,25 @@
     THERMOMETER device(true, true, false, p25);
     
     while (!device.initialize());    // keep calling until it works
-    
+  
     while (true)
     {
         // changing the resolutions only affects the DS18B20. The DS18S20 is fixed.
         device.setResolution(nineBit);
         device.readTemperature(); 
+        myled=1;
         wait(2);
         device.setResolution(tenBit);
         device.readTemperature(); 
+        myled=0;
         wait(2);
         device.setResolution(elevenBit);
         device.readTemperature(); 
+        myled=1;
         wait(2);
         device.setResolution(twelveBit);
         device.readTemperature(); 
+        myled=0;
         wait(2);
     }