Diff: MagneWave.cpp

Revision:

0:5a700113dd87

Child:

1:a82b9af36dbf

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MagneWave.cpp	Tue Oct 29 06:49:27 2013 +0000
@@ -0,0 +1,44 @@
+#include "MagneWave.h"
+
+MagneWave::MagneWave( SoftMCP4922 *dac )
+{
+    m_wave_DAC = dac;
+    m_wave_DAC->write_u16( 32768 );
+}
+
+void MagneWave::play( FILE *wavefile )
+{
+#if 0
+    // data size check
+    unsiged long dataSize = 0;
+    seek( wavefile, 40, SEEK_SET );
+    dataSize = fgetc( wavefile );
+    dataSize |= ( fgetc( wavefile ) << 8 );
+    dataSize |= ( fgetc( wavefile ) << 16 );
+    dataSize |= ( fgetc( wavefile ) << 24 );
+    printf("data size = %ld\n", dataSize );
+#endif
+    
+    // jump to wave data
+    fseek( wavefile, 44, SEEK_SET );
+    
+    while(1){
+        int tmpL = 0;
+        int tmpH = 0;
+        unsigned short dacVal16 = 0;
+        tmpL = fgetc( wavefile );
+        if( tmpL == EOF ){
+            break;
+        }
+        tmpH = fgetc( wavefile );
+        if( tmpH == EOF ){
+            break;
+        }
+        dacVal16 = tmpL;
+        dacVal16 |= ( tmpH << 8 );
+        m_wave_DAC->write_u16( dacVal16 );
+        
+        // TODO: adjust cycle
+        wait( 0.005 );
+    }
+}