Revision 3:05183e50a923, committed 2010-08-26

Comitter:

Blaze513

Date:

Thu Aug 26 18:25:19 2010 +0000

Parent:

2:997b4057c879

Child:

4:a615b75d4126

Commit message:

Changed in this revision

--- a/MB1210.cpp	Mon Aug 23 07:11:10 2010 +0000
+++ b/MB1210.cpp	Thu Aug 26 18:25:19 2010 +0000
@@ -85,6 +85,15 @@
 }
     //hold pin high for at least 20 us to request a synchronous range reading
 
+void MB1210::DiscardSerialBuffer()
+{
+    while (SerialInput->readable())
+    {
+        SerialInput->getc();
+    }
+}
+    //read characters from the buffer until it is empty
+
 float MB1210::Read()
 {
     switch (OperatingMode)
@@ -127,7 +136,7 @@
     }
 }
     //OperatingMode switches to desired output method;
-    //once gathered, the result is scaled according to voltage, the speed of sound, and desired unit
+    //the result is scaled according to voltage, the speed of sound, and desired unit
 void MB1210::Read(char* Buffer)
 {
     if (SerialInput)

--- a/MB1210.h	Mon Aug 23 07:11:10 2010 +0000
+++ b/MB1210.h	Thu Aug 26 18:25:19 2010 +0000
@@ -50,8 +50,10 @@
             //this tells the device to prepare a synchronous range reading;
             //must be called at least 99 ms before the reading is needed;
             //changes asynchronous mode to synchronous equivalent
-        void DiscardBuffer();
-            //empties the buffer on the serial port to sync the next reading
+        void DiscardSerialBuffer();
+            //the serial port has a buffer and only the oldest data is read from it;
+            //the buffer has limited space and, when full, the newest data is discarded;
+            //this method allows the user to empty the buffer of old data so new data is used
         float Read();
             //get a reading from the device in the set mode;
             //RequestSyncRead() must be called at least 99 ms

--- a/PwmIn/PwmIn.cpp	Mon Aug 23 07:11:10 2010 +0000
+++ b/PwmIn/PwmIn.cpp	Thu Aug 26 18:25:19 2010 +0000
@@ -7,9 +7,10 @@
 
 PwmIn::PwmIn(PinName pwi) : InterruptIn(pwi), PeriodMeasurement(0), PulseWidthMeasurement(1)
 {
-        rise(this, &PwmIn::PulseStart);
-        fall(this, &PwmIn::PulseStop);
-        start();
+    mode(PullDown);
+    rise(this, &PwmIn::PulseStart);
+    fall(this, &PwmIn::PulseStop);
+    start();
 }
 
 float PwmIn::read()