--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cs/layer1/gtt_include/l1gtt_varex.h	Fri Oct 16 06:23:26 2020 +0000
@@ -0,0 +1,109 @@
+/************* Revision Controle System Header *************
+ *                  GSM Layer 1 software 
+ * L1GTT_VAREX.H
+ *
+ *        Filename %M%
+ *  Copyright 2003 (C) Texas Instruments  
+ *
+ ************* Revision Controle System Header *************/
+
+
+#if (L1_GTT == 1)
+
+  #ifdef L1GTT_ASYNC_C
+    // Every BUFFER are associated with a variable
+    T_TTY_FIFO_struct *TTY_FIFO_1;
+    T_TTY_FIFO_struct *TTY_FIFO_2;
+    T_TTY_FIFO_struct *TTY_FIFO_3;
+    T_TTY_FIFO_struct *TTY_FIFO_4;
+
+    /* state variables for CTM transmitter and CTM receiver,respectively */
+    tx_state_t   tx_state;
+    rx_state_t   rx_state;
+  
+    /* State variables for the Baudot decoder and encoder,respectively. */
+    baudot_decode_state_t baudot_decode_state;
+    baudot_encode_state_t baudot_encode_state;
+ 
+ 
+    /* Define fifo state variables */
+    WORD16        baudotOutTTYCodeFifoLength = 50;
+    fifo_state_t  baudotOutTTYCodeFifoState;
+    fifo_state_t  signalFifoState;
+    fifo_state_t  ctmOutTTYCodeFifoState;
+    fifo_state_t  baudotToCtmFifoState;
+    fifo_state_t  ctmToBaudotFifoState;
+
+    WORD16     cntFramesSinceBurstInit          = 0;
+    WORD16     cntSamplesSinceLastBypassFromCTM = 0;
+    WORD16     cntTransmittedEnquiries          = 0;
+    BOOL       ctmFromFarEndDetected     = false;
+    BOOL       ctmCharacterTransmitted   = false;
+    BOOL       enquiryFromFarEndDetected = false;
+    BOOL       ctmTransmitterIsIdle      = true;
+    BOOL       earlyMutingRequired       = false;
+    BOOL       transparentMode           = false;
+
+    /* Used to keep track of time since last Enquiry burst. 
+     * Currently 1 cycle == 120 ms */
+    WORD16     cyclesSinceLastEnquiryBurst      = 0; 
+
+    /* Stores the output from baudot encoder in downlink */
+    fifo_state_t  baudotCodeFifoState;    
+    /* Store the output from CTM transmitter in uplink */
+    fifo_state_t  ctmCodeULFifoState;     
+
+    WORD16 cntSamplesSinceEnquiryDetected = 0;
+
+    /* Shared global buffers between L1S and l1gtt_main_processing. */
+    fifo_state_t  global_ul;
+    fifo_state_t  global_dl;
+
+    int init_complete = 0;
+
+    /* Array containing silence data for muting uplink bypass path. */
+    WORD16 silence_data[]={0,0,0,0,0,0,0,0};
+
+    /* Global flag to indicate that uplink bypass path is to be muted */
+    int begin_ul_bypasspath_mute = 0;
+    
+    /* Counter for keeping track of amount of silence written to DSP task 2. */
+    int silence_pad_time = 0;
+
+  #else
+    extern T_TTY_FIFO_struct  *TTY_FIFO_1;
+    extern T_TTY_FIFO_struct  *TTY_FIFO_2;
+    extern T_TTY_FIFO_struct  *TTY_FIFO_3;
+    extern T_TTY_FIFO_struct  *TTY_FIFO_4;
+    extern tx_state_t    tx_state;
+    extern rx_state_t   rx_state;
+    extern baudot_decode_state_t baudot_decode_state;
+    extern baudot_encode_state_t baudot_encode_state;
+    extern WORD16        baudotOutTTYCodeFifoLength;
+    extern fifo_state_t  baudotOutTTYCodeFifoState;
+    extern fifo_state_t  signalFifoState;
+    extern fifo_state_t  ctmOutTTYCodeFifoState;
+    extern fifo_state_t  baudotToCtmFifoState;
+    extern fifo_state_t  ctmToBaudotFifoState;
+    extern WORD16     cntFramesSinceBurstInit;
+    extern WORD16     cntSamplesSinceLastBypassFromCTM;
+    extern WORD16     cntTransmittedEnquiries;
+    extern BOOL       ctmFromFarEndDetected;
+    extern BOOL       ctmCharacterTransmitted;
+    extern BOOL       enquiryFromFarEndDetected;
+    extern BOOL       ctmTransmitterIsIdle;
+    extern BOOL       earlyMutingRequired;
+    extern BOOL       transparentMode;
+    extern WORD16     cyclesSinceLastEnquiryBurst; 
+    extern fifo_state_t  baudotCodeFifoState;    
+    extern fifo_state_t  ctmCodeULFifoState;     
+    extern WORD16 cntSamplesSinceEnquiryDetected;
+    extern fifo_state_t  global_ul;
+    extern fifo_state_t  global_dl;
+    extern int init_complete;
+    extern WORD16 silence_data[];
+    extern int begin_ul_bypasspath_mute;
+    extern int silence_pad_time;
+  #endif
+
+#endif