Diff: LightSnoop.cpp

Revision:

0:6da5625a6946

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LightSnoop.cpp	Thu Dec 29 01:59:53 2011 +0000
@@ -0,0 +1,135 @@
+//
+// LightSnoop.cpp - Listen to a serial stream, and determine light
+// colors and settings from it.
+//
+
+#include "HoldInterrupts.h"
+#include "LightString.h"
+#include "LightSnoop.h"
+#include "SystemState.h"
+
+#include "SDFileSystem.h"
+
+LightSnoop::LightSnoop( int numLights )
+ : fLightValues( numLights ), 
+   fSnoopState( kAwaitCommand ),
+   fCommand(' '),
+   fID( 0 ),
+   fBufferIndex( 0 ),
+   fLastBufferIndex( 0 )
+{
+}
+
+bool LightSnoop::IsActive() 
+{
+    bool active = fBufferIndex != fLastBufferIndex;
+    fLastBufferIndex = fBufferIndex;
+    return active;
+}
+
+void LightSnoop::SaveSnoop()
+{
+    HoldInterrupts noint();
+    SDFileSystem sdcard( p5, p6, p7, p8, "sd" );
+    int i;
+    
+    for (i = 0; i < fBufferIndex; ++i)
+        Process(fBuffer[i]);
+    fBufferIndex = 0;
+    fLastBufferIndex = 0;
+
+    FILE * f = fopen( "/sd/_WEBPAGE.CRI", "w" );
+
+    if (f)
+    {
+        int i;
+        for (i = 0; i < fLightValues.size(); ++i)
+            fprintf( f, "%d\r\n", fLightValues[i] );
+        fclose(f);
+        printf("Updated /sd/_WEBPAGE.CRI\r\n");
+        gSystemState.SetPatternIndex( 0 );
+        gSystemState.SetModeSelector( kPatternSelector );
+    }
+    else
+        printf("Unable to open /sd/_WEBPAGE.CRI\r\n");
+}
+
+void LightSnoop::Listen( uint8_t ch )
+{
+    if (fBufferIndex >= kBufferMax)
+        fBufferIndex = 0;
+    fBuffer[fBufferIndex++] = ch;
+}
+
+// Convert the nine bit binary RGB value to the 
+// "BCD" three digit RGB value
+static uint16_t RGB_value( int value )
+{
+    return ((value >> 6) * 100) 
+            + (((value >> 3) & 7) * 10)
+            + (value & 7);
+}
+
+void LightSnoop::Process( const uint8_t ch )
+{
+    switch (fSnoopState)
+    {
+    case kAwaitCommand:
+    {
+        fCommand = ch;
+        switch (ch)
+        {
+        case 'C':   fSnoopState = kAwaitID; break;      // Set color
+
+        case 'I':                                       // Init string
+        case 'N':                                       // Set # of lights
+        case 'f':
+        case 'F':
+        case 'D':   fSnoopState = kAwaitValue; break;
+ 
+        case 'S':
+        case 's':
+        default:    fSnoopState = kAwaitCommand; break;
+        }
+    }
+    
+    case kAwaitValue:
+    {
+        switch (fCommand)
+        {
+        case 'C':
+            if ((fID & 0x7F) < fLightValues.size())
+            {
+                fLightValues[fID & 0x7F] = RGB_value( ((fID & 0x80) < 1) | ch );
+//                Modified();
+            }
+            else
+                printf("Bad light ID: %d\n", (int) (fID & 0x7F));
+            break;
+            
+        case 'I':   break;  // Could set the lights to the init pattern here...
+        case 'N':
+            fLightValues.resize( ch );
+            break;
+        }
+        fSnoopState = kAwaitCommand;    // reset state machine
+    }
+   
+    case kAwaitID:
+    {
+        switch (fCommand)
+        {
+        case 'C':
+            fID = ch;
+            fSnoopState = kAwaitValue;
+            break;
+        default:
+            printf("Bad state\n");
+            fSnoopState = kAwaitCommand;
+            break;
+        }
+    }
+    }
+}
+
+    
\ No newline at end of file