--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cs/layer1/gtt_include/l1gtt_const.h	Sun Jul 15 04:39:26 2018 +0000
@@ -0,0 +1,138 @@
+/************* Revision Controle System Header *************
+ *                  GSM Layer 1 software 
+ * L1GTT_CONST.C
+ *
+ *        Filename l1gtt_const.h
+ *  Copyright 2003 (C) Texas Instruments  
+ *
+ ************* Revision Controle System Header *************/
+
+
+//----------------------------------------
+// MCU<->DSP communication bit field.
+//----------------------------------------
+// NDB area 
+// bit in d_audio for tty features
+#define B_GTT_START   (TRUE_L << 4)
+#define B_GTT_STOP    (TRUE_L << 5)
+
+//-------------------------------
+// GTT background task status
+//-------------------------------
+
+#define GTT_ACTIVATED   1
+#define GTT_IDLE        0
+
+//----------------------------
+// GTT DSP customizable values
+//----------------------------
+
+#define C_TTY_MOD_NORM       0x3FFF // Sets the amplitude of the TTY modulator output
+#define C_TTY_DETECT_THRES   0x1800 // Threshold for detection by the TTY estimator
+#define C_TTY_FA_THRES       0x0CCC // Threshold for TTY false alarm detection
+#define C_CTM_DETECT_SHIFT   0x0000 // Shift of the threshold used for detection by the CTM estimator
+
+//-------------------------
+// FIFO constants
+//-------------------------
+
+// FIFO size
+// Note: Practical size is equal to acutual size + 1.
+#define FIFO_1_size 0x1C //28  
+#define FIFO_2_size 0x3C //60  
+#define FIFO_3_size 0x3C //60  
+#define FIFO_4_size 0x1C //28 
+
+// Header size 
+#define HEADER_size (sizeof(T_TTY_FIFO_struct)/2)
+
+/***********************************************************************/
+/*            ___                *                  ___                */
+/* @dsp 10BE | R |               *   @mcu FFD0117C | R |               */
+/*           | W |               *                 | W |               */
+/*           | S |               *                 | S |               */
+/*           | L |               *                 | L |               */
+/*           | x |               *                 | x |               */
+/*   FIFO 1  | x |               *                 | x |               */
+/*           | x |               *                 | x |               */
+/*           | x |               *                 | x |               */
+/*           | x |               *                 | x |               */
+/*           | x |               *                 | x |               */
+/*           | x |               *                 | x |               */
+/*           | x |               *                 | x |               */
+/*           |___|               *                 |___|               */
+/*            ___                *                  ___                */
+/* @dsp 10DF | R |               *   @mcu FFD011BE | R |               */
+/*           | . |               *                 | . |               */
+/*   FIFO 2  | . |               *     FIFO 2      | . |               */
+/*           |___|               *                 |___|               */
+/*            ___                *                  ___                */
+/* @dsp 1120 | R |               *   @mcu FFD01240 | R |               */
+/*           | . |               *                 | . |               */
+/*   FIFO 3  | . |               *     FIFO 3      | . |               */
+/*           |___|               *                 |___|               */
+/*            ___                *                  ___                */
+/* @dsp 1161 | R |               *   @mcu FFD012C2 | R |               */
+/*           | . |               *                 | . |               */
+/*   FIFO 4  | . |               *     FIFO 4      | . |               */
+/*           |___|               *                 |___|               */
+/*                  *                                     */
+/***********************************************************************/
+
+//FIFO @dress dsp
+#define FIFO_1_dsp 0x10BE // corresponds to the speech recognition buffer
+#define FIFO_2_dsp (FIFO_1_dsp + HEADER_size + FIFO_1_size + 1)
+#define FIFO_3_dsp (FIFO_2_dsp + HEADER_size + FIFO_2_size + 1)
+#define FIFO_4_dsp (FIFO_3_dsp + HEADER_size + FIFO_3_size + 1)
+
+//FIFO @dress mcu
+#define FIFO_1_mcu 0xFFD0117C // corresponds to the speech recognition buffer
+#define FIFO_2_mcu (FIFO_1_mcu + ((HEADER_size + FIFO_1_size + 1) * 2))
+#define FIFO_3_mcu (FIFO_2_mcu + ((HEADER_size + FIFO_2_size + 1) * 2))
+#define FIFO_4_mcu (FIFO_3_mcu + ((HEADER_size + FIFO_3_size + 1) * 2))
+
+// Return status
+#define TTY_FIFO_OK   0 
+#define TTY_FIFO_OVERFLOW 1 
+#define TTY_FIFO_UNDERFLOW 2 
+#define TTY_FIFO_WRONG_COMMAND 3
+
+/* GTT Event group defines */
+#define DATA_AVAIL_EVENT            0x00000001  // BIT_0
+#define INIT_EVENT                  0x00000002  // BIT_1
+#define EXIT_EVENT                  0x00000004  // BIT_2
+
+#define DSP_API_START               0x800
+
+/* constant definitions */
+/* Time interval to check for incoming data, in ms */
+#define  TIME_INTERVAL_OF_INPUTS    120  
+/* Max number of CTM sample inputs    */
+#define  MAX_CTM_SAMPLES_IN         (TIME_INTERVAL_OF_INPUTS * 2)/5  
+/* Max number of Baudot sample inputs */  
+#define  MAX_BAUDOT_SAMPLES_IN      (TIME_INTERVAL_OF_INPUTS * 1)/5   
+/* Max number of TTY code from inputs */ 
+#define  MAX_TTY_CODE_IN            (TIME_INTERVAL_OF_INPUTS / 176 + 2) 
+/* Max number of CTM sample outputs   */
+#define  MAX_CTM_SAMPLES_OUT        MAX_CTM_SAMPLES_IN   
+/* Max number of Baudot bits outputs  */    
+#define  MAX_BAUDOT_BITS_OUT        2*(MAX_TTY_CODE_IN)* 8    
+
+/* Number of processing cycles before the next Enquiry burst */
+#define  ENQUIRY_BURST_TIMEOUT      (1320/5)
+
+#define UWORD16_MAX 65535
+#define WORD16_MAX  32767
+
+#define WORD32_MAX  2147483647L
+
+/* GTT loops for test: TST_CLOSE_GTT_LOOP_REQ message */
+#define TTY_LOOP 0x0001   // Close TTY loop (TTY modulator -> TTY estimator)
+#define CTM_LOOP 0x0002   // Close CTM loop (CTM samples : speech encoder -> speech decoder) 
+
+#if (L2_L3_SIMUL)
+  #define CTM_TX_INPUT   1 // input on CTM transmitter
+  #define TTY_ENC_INPUT  2 // input on Baudot encoder
+  #define CTM_RX_INPUT   3 // input on CTM receiver (simulation only)
+  #define TTY_DEC_INPUT  4 // input on Baudot decoder (simulation only)
+#endif