--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/g23m-gsm/dl/dl_sacch0.c	Sun Jul 15 04:40:46 2018 +0000
@@ -0,0 +1,164 @@
+/*
++-----------------------------------------------------------------------------
+|  Project :  GSM-PS
+|  Modul   :  DL_SACCH0
++-----------------------------------------------------------------------------
+|  Copyright 2002 Texas Instruments Berlin, AG
+|                 All rights reserved.
+|
+|                 This file is confidential and a trade secret of Texas
+|                 Instruments Berlin, AG
+|                 The receipt of or possession of this file does not convey
+|                 any rights to reproduce or disclose its contents or to
+|                 manufacture, use, or sell anything it may describe, in
+|                 whole, or in part, without the specific written consent of
+|                 Texas Instruments Berlin, AG.
++-----------------------------------------------------------------------------
+|  Purpose :  This Modul defines the functions for the slow associated
+|             control channel SACCH (only SAPI=0) of the component DL
++-----------------------------------------------------------------------------
+*/
+
+#ifndef DL_SACCH0_C
+#define DL_SACCH0_C
+
+#define ENTITY_DL
+
+/*==== INCLUDES ===================================================*/
+
+#include "typedefs.h"
+#include <string.h>
+#include "pconst.cdg"
+#include "vsi.h"
+#include "custom.h"
+#include "gsm.h"
+#include "mon_dl.h"
+#include "prim.h"
+#include "pei.h"
+#include "tok.h"
+#include "ccdapi.h"
+#include "dl.h"
+#include "dl_trc.h"
+
+/*==== EXPORT =====================================================*/
+
+/*==== PRIVAT =====================================================*/
+
+/*==== VARIABLES ==================================================*/
+GLOBAL const T_FRAME  meas_report_no_nc =
+{
+  N201_SACCH*8,
+  24,
+  {
+    0x00, 0x00, 0x00,
+    0x06, 0x15, 0x1E, 0x1E, 0x7E,
+    0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00
+  }
+};
+LOCAL const T_FRAME  meas_report_invalid =
+{
+  N201_SACCH*8,
+  24,
+  {
+    0x00, 0x00, 0x00,
+    0x06, 0x15, 0x00, 0x40, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00
+  }
+};
+
+
+/*==== FUNCTIONS ==================================================*/
+/*
++--------------------------------------------------------------------+
+| PROJECT : GSM-PS (6147)       MODULE  : DL_SACCH0                  |
+| STATE   : code                ROUTINE : sacch_init_dl_data         |
++--------------------------------------------------------------------+
+
+  PURPOSE : Initialisation of SACCH data for an instance.
+
+*/
+
+GLOBAL void sacch0_init_dl_data (void)
+{
+  GET_INSTANCE_DATA;
+  T_CCH *pcch = &dl_data->cch[C_SACCH0];
+  TRACE_FUNCTION ("sacch_init_dl_data()");
+
+  memset (pcch, 0, sizeof (T_CCH));
+  pcch->ch_type        = L2_CHANNEL_SACCH;
+
+  if (dl_data->dcch3_in_msg)
+  {
+    COM_FREE_POINTER (dl_data->dcch3_in_msg);
+    dl_data->dcch3_in_msg = NULL;
+  }
+
+  sacch0_reset_meas ();
+}
+
+/*
++--------------------------------------------------------------------+
+| PROJECT : GSM-PS (6147)       MODULE  : DL_SACCH0                  |
+| STATE   : code                ROUTINE : sacch0_reset_meas            |
++--------------------------------------------------------------------+
+
+  PURPOSE : Reset measurement reports and sacch_mode.
+
+*/
+
+GLOBAL void sacch0_reset_meas (void)
+{
+  GET_INSTANCE_DATA;
+  dl_data->sacch_act_buffer = meas_report_no_nc;
+  dl_data->sacch_last_buffer= meas_report_no_nc;
+  dl_data->sacch_mode  = 2;
+}
+
+/*
++--------------------------------------------------------------------+
+| PROJECT : GSM-PS (6147)       MODULE  : DL_SACCH0                  |
+| STATE   : code                ROUTINE : sacch_send_data            |
++--------------------------------------------------------------------+
+
+  PURPOSE : Send unacknowledged data on SACCH, SAPI=0.
+
+*/
+
+GLOBAL void sacch0_send_data (void)
+{
+  GET_INSTANCE_DATA;
+  TRACE_FUNCTION ("sacch_send_data()");
+
+  TRACE_EVENT_WIN_P2 ("SACCH0 MODE = %d, %s", dl_data->sacch_mode,
+    (dl_data->rr_short_pd_buffer.l_buf AND
+      dl_data->rr_short_pd_ch_type EQ L2_CHANNEL_SACCH) ? "RR short PD" : "normal");
+
+  if (dl_data->rr_short_pd_buffer.l_buf AND
+      dl_data->rr_short_pd_ch_type EQ L2_CHANNEL_SACCH)
+  { /* RR message with short PD, short L2 header type 1, format Bter */
+    com_build_UI_Bter (L2_CHANNEL_SACCH);
+  }
+  else
+  { /* format A or B */
+    if (dl_data->sacch_mode EQ 2)
+    {
+      com_build_UI_command (L2_CHANNEL_SACCH, PS_SAPI_0, &meas_report_invalid);
+    }
+    else
+    {
+      if (dl_data->dl_active EQ FALSE)
+        dl_data->sacch_last_buffer = dl_data->sacch_act_buffer;
+
+      com_build_UI_command (L2_CHANNEL_SACCH, PS_SAPI_0, &dl_data->sacch_last_buffer);
+    }
+    if (dl_data->sacch_mode)
+      dl_data->sacch_mode--;
+  }
+}
+
+#endif
+