Diff: MagneWave.cpp

Revision:

2:0fc5df933021

Parent:

1:a82b9af36dbf

Child:

3:500b992880b3

--- a/MagneWave.cpp	Tue Oct 29 15:58:06 2013 +0000
+++ b/MagneWave.cpp	Thu Oct 31 15:07:37 2013 +0000
@@ -1,9 +1,12 @@
 #include "MagneWave.h"
 
+#define DATA_OFFSET 44
+#define DAC_CENTER  32768
+
 MagneWave::MagneWave( SoftMCP4922 *dac )
 {
     m_wave_DAC = dac;
-    m_wave_DAC->write_u16( 32768 );
+    m_wave_DAC->write_u16( DAC_CENTER );
 }
 
 void MagneWave::play( FILE *wavefile )
@@ -16,11 +19,11 @@
     dataSize |= ( fgetc( wavefile ) << 8 );
     dataSize |= ( fgetc( wavefile ) << 16 );
     dataSize |= ( fgetc( wavefile ) << 24 );
-    printf("data size = %ld\n", dataSize );
+    printf( "data size = %ld\n", dataSize );
 #endif
     
     // jump to wave data
-    fseek( wavefile, 44, SEEK_SET );
+    fseek( wavefile, DATA_OFFSET, SEEK_SET );
     
     while(1){
     //16bit
@@ -50,6 +53,6 @@
         m_wave_DAC->write_u8( ( unsigned short )dacVal8 );
         
         // TODO: adjust cycle
-        wait_us(100);
+        wait_us( 75 );
     }
 }