Cleaning files

1 files changed, 67 insertions, 74 deletions

diff --git a/lab2/RTDSP/sine.c b/lab2/RTDSP/sine.c
index aa2653e..561ca0c 100644
--- a/lab2/RTDSP/sine.c
+++ b/lab2/RTDSP/sine.c
@@ -1,33 +1,33 @@
 /*************************************************************************************
-			       DEPARTMENT OF ELECTRICAL AND ELECTRONIC ENGINEERING
-					   		     IMPERIAL COLLEGE LONDON 
+                   DEPARTMENT OF ELECTRICAL AND ELECTRONIC ENGINEERING
+                                    IMPERIAL COLLEGE LONDON
 
- 				      EE 3.19: Real Time Digital Signal Processing
-					       Dr Paul Mitcheson and Daniel Harvey
+                       EE 3.19: Real Time Digital Signal Processing
+                           Dr Paul Mitcheson and Daniel Harvey
 
-				        LAB 2: Learning C and Sinewave Generation 
+                        LAB 2: Learning C and Sinewave Generation
 
- 				             ********* S I N E . C **********
+                              ********* S I N E . C **********
 
-             	Demonstrates outputing data from the DSK's audio port. 
-   			  Used for extending knowledge of C and using look up tables.
+                 Demonstrates outputing data from the DSK's audio port.
+                 Used for extending knowledge of C and using look up tables.
 
  *************************************************************************************
-  				Updated for use on 6713 DSK by Danny Harvey: May-Aug 06/Dec 07/Oct 09
-				CCS V4 updates Sept 10
+                  Updated for use on 6713 DSK by Danny Harvey: May-Aug 06/Dec 07/Oct 09
+                CCS V4 updates Sept 10
  ************************************************************************************/
 /*
  *  Initialy this example uses the AIC23 codec module of the 6713 DSK Board Support
- *  Library to generate a 1KHz sine wave using a simple digital filter. 
- *	You should modify the code to generate a sine of variable frequency.
+ *  Library to generate a 1KHz sine wave using a simple digital filter.
+ *    You should modify the code to generate a sine of variable frequency.
  */
 /**************************** Pre-processor statements ******************************/
 
-//  Included so program can make use of DSP/BIOS configuration tool.  
+//  Included so program can make use of DSP/BIOS configuration tool.
 #include "dsp_bios_cfg.h"
 
-/* The file dsk6713.h must be included in every program that uses the BSL.  This 
-   example also includes dsk6713_aic23.h because it uses the 
+/* The file dsk6713.h must be included in every program that uses the BSL.  This
+   example also includes dsk6713_aic23.h because it uses the
    AIC23 codec module (audio interface). */
 #include "dsk6713.h"
 #include "dsk6713_aic23.h"
@@ -39,7 +39,7 @@
 #include "helper_functions_polling.h"
 
 
-// PI defined here for use in your code 
+// PI defined here for use in your code
 #define PI 3.141592653589793
 
 // Contains the size of the sine table
@@ -49,12 +49,12 @@
 
 /******************************* Global declarations ********************************/
 
-/* Audio port configuration settings: these values set registers in the AIC23 audio 
+/* Audio port configuration settings: these values set registers in the AIC23 audio
    interface to configure it. See TI doc SLWS106D 3-3 to 3-10 for more info. */
 DSK6713_AIC23_Config Config = { \
-			 /**********************************************************************/
-			 /*   REGISTER	            FUNCTION			      SETTINGS         */ 
-			 /**********************************************************************/\
+             /**********************************************************************/
+             /*   REGISTER                FUNCTION                  SETTINGS         */
+             /**********************************************************************/\
     0x0017,  /* 0 LEFTINVOL  Left line input channel volume  0dB                   */\
     0x0017,  /* 1 RIGHTINVOL Right line input channel volume 0dB                   */\
     0x01f9,  /* 2 LEFTHPVOL  Left channel headphone volume   0dB                   */\
@@ -65,27 +65,27 @@ DSK6713_AIC23_Config Config = { \
     0x004f,  /* 7 DIGIF      Digital audio interface format  32 bit                */\
     0x008d,  /* 8 SAMPLERATE Sample rate control             8 KHZ                 */\
     0x0001   /* 9 DIGACT     Digital interface activation    On                    */\
-			 /**********************************************************************/
+             /**********************************************************************/
 };
 
 
-// Codec handle:- a variable used to identify audio interface  
+// Codec handle:- a variable used to identify audio interface
 DSK6713_AIC23_CodecHandle H_Codec;
 
 /* Sampling frequency in HZ. Must only be set to 8000, 16000, 24000
-32000, 44100 (CD standard), 48000 or 96000  */ 
+32000, 44100 (CD standard), 48000 or 96000  */
 int sampling_freq = 16000;
 
 
-// Array of data used by sinegen to generate sine. These are the initial values.                        
+// Array of data used by sinegen to generate sine. These are the initial values.
 float y[3] = {0,0,0};
 float x[1] = {1}; // impulse to start filter
 
 float a0 = 1.4142; // coefficients for difference equation
 float b0 = 0.707;
 
-// Holds the value of the current sample 
-float sample; 
+// Holds the value of the current sample
+float sample;
 
 /* Left and right audio channel gain values, calculated to be less than signed 32 bit
  maximum value. */
@@ -93,7 +93,7 @@ Int32 L_Gain = 2100000000;
 Int32 R_Gain = 2100000000;
 
 
-/* Use this variable in your code to set the frequency of your sine wave 
+/* Use this variable in your code to set the frequency of your sine wave
    be carefull that you do not set it above the current nyquist frequency! */
 float sine_freq = 1000.0;
 
@@ -103,7 +103,7 @@ float table[SINE_TABLE_SIZE];
 // Current index in the table, that can be used to calculate the next index
 int sine_index = 0;
 
-     
+
 /******************************* Function prototypes ********************************/
 void init_hardware(void);
 void sine_init(void);
@@ -112,79 +112,72 @@ float sinegen(void);
 void main()
 {
 
-	// initialize board and the audio port
-	init_hardware();
-	
-	// Initialize the sine table
-	sine_init();
-	
-    // Loop endlessley generating a sine wave 
+    // initialize board and the audio port
+    init_hardware();
+
+    // Initialize the sine table
+    sine_init();
+
+    // Loop endlessley generating a sine wave
     while(1)
     {
- 		// Calculate next sample
- 		sample = sinegen();
- 		
-     	/* Send a sample to the audio port if it is ready to transmit.
+        // Calculate next sample
+        sample = sinegen();
+
+        /* Send a sample to the audio port if it is ready to transmit.
            Note: DSK6713_AIC23_write() returns false if the port if is not ready */
 
         //  send to LEFT channel (poll until ready)
         while (!DSK6713_AIC23_write(H_Codec, ((Int32)(sample * L_Gain))))
         {};
-		// send same sample to RIGHT channel (poll until ready)
+
+        // send same sample to RIGHT channel (poll until ready)
         while (!DSK6713_AIC23_write(H_Codec, ((Int32)(sample * R_Gain))))
         {};
-        
-		// Set the sampling frequency. This function updates the frequency only if it 
-		// has changed. Frequency set must be one of the supported sampling freq.
-		set_samp_freq(&sampling_freq, Config, &H_Codec);
-	
-	}
 
+        // Set the sampling frequency. This function updates the frequency only if it
+        // has changed. Frequency set must be one of the supported sampling freq.
+        set_samp_freq(&sampling_freq, Config, &H_Codec);
+    }
 }
 
 /******************************* init_hardware() ************************************/
 void init_hardware()
 {
-    // Initialize the board support library, must be called first 
+    // Initialize the board support library, must be called first
     DSK6713_init();
-    
-    // Start the codec using the settings defined above in config 
+
+    // Start the codec using the settings defined above in config
     H_Codec = DSK6713_AIC23_openCodec(0, &Config);
 
-	/* Defines number of bits in word used by MSBSP for communications with AIC23
-	 NOTE: this must match the bit resolution set in in the AIC23 */
-	MCBSP_FSETS(XCR1, XWDLEN1, 32BIT);
-	
-	/* Set the sampling frequency of the audio port. Must only be set to a supported 
-	   frequency (8000/16000/24000/32000/44100/48000/96000) */
-	
-	DSK6713_AIC23_setFreq(H_Codec, get_sampling_handle(&sampling_freq));
+    /* Defines number of bits in word used by MSBSP for communications with AIC23
+       NOTE: this must match the bit resolution set in in the AIC23 */
+    MCBSP_FSETS(XCR1, XWDLEN1, 32BIT);
 
+    /* Set the sampling frequency of the audio port. Must only be set to a supported
+       frequency (8000/16000/24000/32000/44100/48000/96000) */
+    DSK6713_AIC23_setFreq(H_Codec, get_sampling_handle(&sampling_freq));
 }
 
-/******************************* sin_init() ************************************/
+/******************************* sin_init() *****************************************/
 void sine_init()
 {
-	int i;
-	for(i = 0; i < SINE_TABLE_SIZE; i++)
-	{
-		table[i] = sin(2 * PI * i / SINE_TABLE_SIZE);
-	}
+    int i;
+    for(i = 0; i < SINE_TABLE_SIZE; i++)
+    {
+        table[i] = sin(2 * PI * i / SINE_TABLE_SIZE);
+    }
 }
 
-/********************************** sinegen() ***************************************/   
+/********************************** sinegen() ***************************************/
 float sinegen(void)
 {
-	// temporary variable used to output values from function
-	float wave;
-	
-	wave = table[(int)((sine_freq / (float)sampling_freq) * (float)SINE_TABLE_SIZE * sine_index) % SINE_TABLE_SIZE];
-	
-	sine_index++;
-
-    return(wave);
-    
-}
+    // temporary variable used to output values from function
+    float wave;
 
+    wave = table[(int)((sine_freq / (float)sampling_freq) * (float)SINE_TABLE_SIZE * sine_index) % SINE_TABLE_SIZE];
 
+    sine_index++;
 
+    return wave;
+}