tab_cpt.c

zigbee 飞思卡尔 音频传输 基于ucos的所有源码

int SIN_TAB[4] = {  0x22BE8F87,     //350Hz
                    0x2B5BC3A0,		//440Hz		
                    0x2F1EB491,		//480Hz
         	        0x3BE51FC8};	//620Hz
 
 /******************************************************
 * The table holds the coefficients for      *
 * the CPT generator, computed as follows              *
 *                                                     *
 *           sin(2pi*f/fs)*2^31	                       *
 *                                                     *
 * with  fs = 8000Hz  (sampling frequency)             *
 *       f  = 350, 440, 480, 620Hz    				   *
 *                                                     *
 ******************************************************/

 int TONES_TAB[24] = {  0x7B31BBB2, 0, 0,	//350Hz    
                       0x786EC7F2, 0, 0,	//440Hz	
                       0x7702EA77, 0, 0,	//480Hz	
         			   0x711F3B6F, 0, 0};	//620Hz
         			             		   
         			
/******************************************************
* The table assembles the coefficients and  *
* initial conditions for the difference equations of  *
* the digital sinusoidal oscillators.                 *
*                                                     *
* In general:                                         *
*   DEQ:    y(n) = 2*cos(2pi*f/fs)*y(n-1) - y(n-2)    *
*   I.C.:   y(-1) = 0                                 *
*           y(-2) = -A*sin(2pi*f/fs)                  *
*   where   A  = desired amplitude of sine wave       *
*           f  = desired frequency of sine wave       *
*           fs = sampling frequency                   *
* In this table, y(-2) is always 0. After invoking    *
* power_level.s, it is modified to -A*sin(2pi*f/fs)   *
* Example:                                            *
*       .word    cos(2pi*f/fs)*2^31	    ;coefficient  *
*       .word    0			            ; y(-1)       *
*       .word    0	                    ; y(-2)       *
*                                                     *
******************************************************/         			
           			  
short offset_dial[7]={
		    			0,				//dial tone offset in amplitude
	 	   				0,				//350Hz offset in SIN_TAB
	 	  				4,				//440Hz offset in SIN_TAB
	  				    8,				//350Hz offset(y(-2)) in TONES_TAB
	 	   				20,				//440Hz offset(y(-2)) in TONES_TAB
	 	   				0,
	 	   				12};
	 	   				
short offset_ringback[7]={
					    	4,			//ringback tone offset in amplitude
					    	4,			//440Hz offset in SIN_TAB
					    	8,			//480Hz offset in SIN_TAB
					    	20,			//440Hz offset(y(-2)) in TONES_TAB
					    	32,			//480Hz offset(y(-2)) in TONES_TAB
					    	12,
					    	24};
					    	
short offset_busy_reorder[7]={	
							   8,		//busy and reorder tone offset in amplitude
							   8,		//480Hz offset in SIN_TAB
							   12,		//620Hz offset in SIN_TAB
							   32,		//480Hz offset(y(-2)) in TONES_TAB
							   44,		//620Hz offset(y(-2)) in TONES_TAB
							   24,
							   36};
							   
int amplitude[3] = 
{
0xF5895457,		//-13dBm
0xFAC17C0A,		//-19dBm
0xFD0D0C4E		//-24dBm	
};