From: baobrien <baobrien@01035d8c-6547-0410-b346-abe4f91aad63>
Date: Tue, 5 Sep 2017 08:09:07 +0000 (+0000)
Subject: A small bit of work on TDMA
X-Git-Url: http://git.whiteaudio.com/gitweb/?a=commitdiff_plain;h=e509c8fea7ee5823eaeadeac491bb2fc74d9115a;p=freetel-svn-tracking.git

A small bit of work on TDMA


git-svn-id: https://svn.code.sf.net/p/freetel/code@3358 01035d8c-6547-0410-b346-abe4f91aad63
---

diff --git a/codec2-dev/src/CMakeLists.txt b/codec2-dev/src/CMakeLists.txt
index 66a6fe15..4feaca40 100644
--- a/codec2-dev/src/CMakeLists.txt
+++ b/codec2-dev/src/CMakeLists.txt
@@ -205,6 +205,7 @@ set(CODEC2_SRCS
     fm.c
     fsk.c
     fmfsk.c
+    tdma.c
     kiss_fft.c
     kiss_fftr.c
     linreg.c
diff --git a/codec2-dev/src/tdma.c b/codec2-dev/src/tdma.c
deleted file mode 100644
index f03e20fa..00000000
--- a/codec2-dev/src/tdma.c
+++ /dev/null
@@ -1,38 +0,0 @@
-/*---------------------------------------------------------------------------*\
-
-  FILE........: tdma.c
-  AUTHOR......: Brady O'Brien
-  DATE CREATED: 18 September 2016
-
-  Skeletion of the TDMA FSK modem
-
-\*---------------------------------------------------------------------------*/
-
-/*
-  Copyright (C) 2017 Brady O'Brien
-
-  All rights reserved.
-
-  This program is free software; you can redistribute it and/or modify
-  it under the terms of the GNU Lesser General Public License version 2.1, as
-  published by the Free Software Foundation.  This program is
-  distributed in the hope that it will be useful, but WITHOUT ANY
-  WARRANTY; without even the implied warranty of MERCHANTABILITY or
-  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
-  License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with this program; if not, see <http://www.gnu.org/licenses/>.
-*/
-
-
-#include "fsk.h"
-#include "freedv_vhf_framing.h"
-#include "tdma.h"
-#include <stdint.h>
-
-/* Structure for tracking basic TDMA modem config */
-struct TDMA_MODE_SETTINGS {
-    uint8_t n_slots;    
-    
-}
\ No newline at end of file
diff --git a/codec2-dev/src/tdma.h b/codec2-dev/src/tdma.h
index 69a8811f..7740d7ad 100644
--- a/codec2-dev/src/tdma.h
+++ b/codec2-dev/src/tdma.h
@@ -31,6 +31,7 @@
 #include "fsk.h"
 #include "freedv_vhf_framing.h"
 #include <stdint.h>
+#include "comp_prim.h"
 
 //typedef void (*tdma_cb_rx_frame)()
 
@@ -75,15 +76,19 @@ struct TDMA_SLOT {
 
 /* Structure for tracking basic TDMA modem config */
 struct TDMA_MODE_SETTINGS {
-    uint32_t bit_rate;              /* Modem bitrate */
+    uint32_t sym_rate;              /* Modem symbol rate */
+    uint32_t fsk_m;                 /* Number of modem tones */
     uint32_t samp_rate;             /* Modem samplerate */
-    uint32_t slot_size;             /* Number of bits per slot, including quiet padding time */
-    uint8_t n_slots;                /* Number of TDMA slots */
-    uint8_t frame_type;             /* Frame type number for framer/deframer */
-}
+    uint32_t slot_size;             /* Number of symbols per slot, including quiet padding time */
+    uint32_t frame_size;            /* Number of symbols per frame, not inclduing quiet padding */
+    uint32_t n_slots;                /* Number of TDMA slots */
+    uint32_t frame_type;             /* Frame type number for framer/deframer */
+};
 
 /* Declaration of basic 4800bps freedv tdma mode, defined in tdma.h */
-struct TDMA_MODE_SETTINGS FREEDV_4800T;
+//struct TDMA_MODE_SETTINGS FREEDV_4800T;
+
+#define FREEDV_4800T {2400,4,48000,48,44,2,FREEDV_VHF_FRAME_AT}
 
 /* TDMA modem */
 struct TDMA_MODEM {
@@ -91,12 +96,13 @@ struct TDMA_MODEM {
     enum tdma_state state;          /* Current state of modem */
     struct TDMA_SLOT * slots;       /* Linked list of slot structs */
     struct TDMA_MODE_SETTINGS settings; /* Basic TDMA config parameters */
-    float * sample_buffer;          /* Buffer of incoming samples */
-    size_t sample_sync_offset;      /* Offset into the sample buffer where slot 1 starts */
+    COMP * sample_buffer;          /* Buffer of incoming samples */
+    size_t sample_sync_offset;      /* Offset into the sample buffer where slot 0 starts */
 };
 
 /* Allocate and setup a new TDMA modem */
 struct TDMA_MODEM * tdma_create(struct TDMA_MODE_SETTINGS mode);
 
+/* Tear down and free a TDMA modem */
 void tdma_destroy(struct TDMA_MODEM * tdma);
 #endif