Diff: main.cpp

Revision:

1:98ddcbbe10ba

Parent:

0:a837eeab3ca6

Child:

2:d5028a37f17b

--- a/main.cpp	Sun Jun 19 05:47:06 2016 +0000
+++ b/main.cpp	Sun Dec 11 21:05:20 2016 +0000
@@ -1,11 +1,15 @@
+#include "mbed.h"
+
+
 #include "unzen.h"          // audio framework include file
-#include "umb_adau1361a.h"     // audio codec contoler include file
-#include "mbed.h"
+#include "umb_adau1361a.h"  // audio codec contoler include file
+#include "amakusa.h"   // audio signal processing class library.
  
-#define CODEC_I2C_ADDR 0x38
+#define CODEC_I2C_ADDR 0x38 // Address of the ADAU-1361A
  
 DigitalOut myled1(LED1);
  
+amakusa::OSCSinCos osc( 440.0, 48000 );    // freq=440Hz, Fs=48kHz.
  
    // customer signal processing initialization call back.
 void init_callback(
@@ -25,11 +29,13 @@
            unsigned int block_size     // block size [sample]
            )
 {
-       // Sample processing
+       // generate tone.
+   osc.run( tx_left_buffer, block_size );
+
+        // copy left to right   
    for ( int i=0; i<block_size; i++)   // for all sample
    {
-       tx_left_buffer[i] = rx_left_buffer[i];      // copy from input to output
-       tx_right_buffer[i] = rx_right_buffer[i];
+       tx_right_buffer[i] = tx_left_buffer[i] *= 0.5F;
        
    }
 }
@@ -42,10 +48,7 @@
    I2C i2c(D14, D15);
  
        // create an audio codec contoler
-   shimabara::UMB_ADAU1361A codec(shimabara::Fs_32, i2c, CODEC_I2C_ADDR ); // Default Fs is 48kHz
-//    shimabara::UMB_ADAU1361A codec(shimabara::Fs_441, i2c, CODEC_I2C_ADDR );
-//    shimabara::UMB_ADAU1361A codec(shimabara::Fs_48, i2c, CODEC_I2C_ADDR );
-//    shimabara::UMB_ADAU1361A codec(shimabara::Fs_96, i2c, CODEC_I2C_ADDR );
+    shimabara::UMB_ADAU1361A codec(shimabara::Fs_48, i2c, CODEC_I2C_ADDR );     // Fs can be Fs_32, Fs_441, Fs_48, Fs_96
  
       // create an audio framework by singlton pattern
    unzen::Framework audio;
@@ -64,18 +67,17 @@
        // Start the audio framework on ARM processor.  
    audio.start( init_callback, process_callback);     // path the initializaiton and process call back to framework 
  
+   codec.set_hp_output_gain( -3, -3 );
+   codec.set_line_output_gain( -3, -3 );
  
        // periodically changing gain for test
    while(1)     
    {
-       for ( int i=-15; i<4; i++ )
-       {
-           codec.set_hp_output_gain( i, i );
-           codec.set_line_output_gain( i, i );
-           myled1 = 1;
-           wait(0.2);
-           myled1 = 0;
-           wait(0.2);
-       }
+       /*
+       myled1 = 1;
+       wait(0.2);
+       myled1 = 0;
+       wait(0.2);
+       */
    }
 }
\ No newline at end of file