aic_cfg.inc

DSP c54** 实现的DTMF产生和解码 汇编原代码 包括了goerztel算法详细讲解

***********************************************************************
* MODULE NAME: aic_cfg.inc                                            *
*                                                                     *
* AUTHOR:  Nathan Baltz                                               *
*                                                                     *
* DESCRIPTION:  This file initializes constants that are used for     *
*  the initialization of the Analog Interface Circuit (AIC).          *                                                       *
*                                                                     *  
* DATE:  Summer 1996                                                  *
*                                                                     *
***********************************************************************
*       (C) COPYRIGHT TEXAS INSTRUMENTS, INC. 1996                    *                
***********************************************************************

K_0		.set	0
K_A_15_9	.set	0000000b << 9		; A register bits 15-9
K_A_8		.set	1b << 8			; set bit 8 to 1
K_A_7_0		.set	00100100b << 0		; bits 7-0
K_REG_1		.set	K_A_15_9|K_A_8|K_A_7_0 ; 8-bit (DS07-DS00) data for A register
						;  FCLK = 144kHz => A = 24h

K_B_15_12	.set	0000b << 12		; B register bits 15-12
K_B_11_8	.set	0010b << 8		; set bit 9 to 1
K_B_7_0		.set	00001111b << 0		; bits 7-0
K_REG_2		.set	K_B_15_12|K_B_11_8|K_B_7_0 ; 8-bit (DS07-DS00) data for B register
						; fs = 9.6kHz => B = 0fh

K_AA_15_12	.set	0000b << 12		; A' register bits 15-12
K_AA_11_8	.set	0011b << 8		; set bit 9 to 1 and 8 to 1
K_AA_7_0	.set	00000000b << 0		; bits 7-0
K_REG_3		.set	K_AA_15_12|K_AA_11_8|K_AA_7_0 ; 8-bit (DS07-DS00) data for A