FreeCalypso > hg > fc-selenite

annotate src/cs/layer1/gtt_include/ctm/wait_for_sync.h @ 127:ee67197fd2e5

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
README: added note about Selenite getting synced with Magnetite
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 07 Nov 2018 09:52:06 +0000
parents b6a5e36de839
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
0
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 *******************************************************************************
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 *
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 * COPYRIGHT (C) 2000 BY ERICSSON EUROLAB DEUTSCHLAND GmbH
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 * 90411 NUERNBERG, GERMANY, Tel Int + 49 911 5217 100
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 *
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 * The program(s) may be used and/or copied only with the
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 * written permission from Ericsson or in accordance
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 * with the terms and conditions stipulated in the agreement or
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 * contract under which the program(s) have been supplied.
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 *
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12 *******************************************************************************
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 *
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 * File : wait_for_sync.h
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 * Purpose : synchronization routine for the deinterleaver
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 *
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 *******************************************************************************
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 #ifndef wait_for_sync_h
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 #define wait_for_sync_h "$Id: $"
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 /*
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 *******************************************************************************
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 * INCLUDE FILES
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 *******************************************************************************
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 #include "ctm_typedefs.h"
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 /*
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 *******************************************************************************
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 * DECLARATION OF PROTOTYPES
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 *******************************************************************************
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 typedef struct {
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
37 WORD16 *shift_reg; /* shift register */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
38 WORD16 *m_sequence; /* maximum length sequence (preamble) */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
39 WORD16 *m_sequence_resync; /* maximum length sequence (resync) */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
40 WORD16 *sync_index_vec; /* positions/indices of the preamble */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
41 WORD16 *resync_index_vec; /* positions/indices of the resync sequence */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
42 WORD16 length_shift_reg; /* length of the vector shift_reg */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
43 WORD16 offset; /* */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
44 WORD16 num_sync_bits; /* length of the preamble */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
45 BOOL sync_found; /* true if receiver is "in sync" */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
46 BOOL alreadyCTMreceived; /* true if burst has been received earlier */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
47 WORD16 *xcorr1_shiftreg;
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
48 WORD16 *xcorr2_shiftreg;
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
49 UWORD16 cntSymbolsSinceEndOfBurst;
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
50 } wait_for_sync_state_t;
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
51
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
52
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
53
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
54 /* ----------------------------------------------------------------------- */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
55 /* Function init_wait_for_sync() */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
56 /* ***************************** */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
57 /* Initialization of the synchronization detector. The dimensions of the */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
58 /* corresponding interleaver at the TX side must be specified: */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
59 /* B (horizontal) blocklength */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
60 /* D (vertical) interlace factor */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
61 /* num_sync_lines2 number of interleaver lines with additional sync bits */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
62 /* ptr_wait_state pointer to the state variable of the sync detector */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
63 /* ----------------------------------------------------------------------- */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
64
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
65 void init_wait_for_sync(wait_for_sync_state_t *ptr_wait_state,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
66 WORD16 B, WORD16 D,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
67 WORD16 num_sync_lines2);
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
68
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
69 /*
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
70 ***********************************************************************
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
71 * Shutdown_wait_for_sync() *
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
72 * ************************ *
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
73 * Deallocate dyamically created buffers. *
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
74 * *
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
75 * Input variables: *
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
76 * intl_state : pointer to a variable of wait_for_sync_state_t *
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
77 * containing the wait_for_sync state machine. *
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
78 ***********************************************************************
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
79 */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
80 void Shutdown_wait_for_sync(wait_for_sync_state_t *ptr_wait_state);
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
81
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
82 /* ----------------------------------------------------------------------- */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
83 /* Function reinit_wait_for_sync() */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
84 /* ******************************* */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
85 /* Reinitialization of synchronization detector. This function is used in */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
86 /* case that a burst has been finished and the transmitter has switched */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
87 /* into idle mode. After calling reinit_wait_for_sync(), the function */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
88 /* wait_for_sync() inhibits the transmission of the demodulated bits to */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
89 /* the deinterleaver, until the next synchronization sequence can be */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
90 /* detected. */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
91 /* ----------------------------------------------------------------------- */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
92
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
93 void reinit_wait_for_sync(wait_for_sync_state_t *ptr_wait_state);
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
94
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
95
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
96
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
97 /* ----------------------------------------------------------------------- */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
98 /* Function wait_for_sync() */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
99 /* ************************ */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
100 /* This function shall be inserted between the demodulator and the */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
101 /* deinterleaver. The function searches the synchronization bitstream */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
102 /* and cuts all received heading bits. As long as no sync is found, this */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
103 /* function returns *ptr_num_valid_out_bits=0 so that the main program */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
104 /* is able to skip the deinterleaver as long as no valid bits are */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
105 /* available. If the sync info is found, the complete internal shift */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
106 /* register is copied to out_bits so that wait_for_sync can be transparent */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
107 /* and causes no delay for future calls. */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
108 /* *ptr_wait_interval returns a value of 0 after such a synchronization */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
109 /* indicating that this was a regular synchronization. */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
110 /* */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
111 /* Regularly, the initial preamble of each burst is used as sync info. */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
112 /* In addition, the resynchronization sequences, which occur periodically */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
113 /* during a running burst, are used as "back-up" synchronization in order */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
114 /* to avoid loosing all characters of a burst, if the preamble was not */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
115 /* detected. */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
116 /* If the receiver is already synchronized on a running burst */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
117 /* and the resynchronization sequence is detected, *ptr_resync_detected */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
118 /* returns a non-negative value in the range 0...num_in_bits-1 indicating */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
119 /* at which bit the resynchronization sequence has been detected. If no */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
120 /* resynchronization has been detected, *ptr_resync_detected is -1. */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
121 /* If the receiver is NOT synchronized and the resynchronization sequence */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
122 /* is detected, the resynchronization sequence is used as initial */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
123 /* synchronization. *ptr_wait_interval returns a value of 32 in this case */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
124 /* due to the different alignments of the synchronizations based on the */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
125 /* preamble or the resynchronization sequence, respectively. */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
126 /* */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
127 /* In order to carry all bits, the minimum length of the vector out_bits */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
128 /* must be: */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
129 /* in_bits.size()-1 + ptr_wait_state->shift_reg_length */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
130 /* */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
131 /* in_bits Vector with bits from the demodulator. The */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
132 /* vector's length can be arbitrarily chosen, */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
133 /* i.e. according to the block length of the */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
134 /* signal processing of the main program. */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
135 /* num_in_bits length of vector in_bits */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 /* num_received_idle_symbols number of idle symbols received coherently */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137 /* out_bits Vector with bits for the deinterleaver. */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 /* The number of the valid bits is indicated */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 /* by *ptr_num_valid_out_bits. */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 /* *ptr_num_valid_out_bits returns the number of valid output bits */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 /* *ptr_wait_interval returns either 0 or 32 */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142 /* *ptr_resync_detected returns a value -1, 0,...num_in_bits */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 /* *ptr_early_muting_required returns whether the original audio signal */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 /* must not be forwarded. This is to guarantee */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 /* that the preamble or resync sequence is */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 /* detected only by the first CTM device, if */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 /* several CTM devices are cascaded */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 /* subsequently. */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
149 /* *ptr_wait_state state information. This variable must be */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
150 /* initialized with init_wait_for_sync() */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
151 /* ----------------------------------------------------------------------- */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
152
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
153 #if(TTY_SYNC_MCU_2 == 0)
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
154 BOOL wait_for_sync(WORD16 *out_bits,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
155 WORD16 *in_bits,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
156 WORD16 num_in_bits,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
157 WORD16 num_received_idle_symbols,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
158 WORD16 *ptr_num_valid_out_bits,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
159 WORD16 *ptr_wait_interval,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
160 WORD16 *ptr_resync_detected,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
161 BOOL *ptr_early_muting_required,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
162 wait_for_sync_state_t *ptr_wait_state);
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
163 #else
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
164 BOOL wait_for_sync(WORD16 *out_bits,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
165 WORD16 *in_bits,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
166 WORD16 num_in_bits,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
167 WORD16 num_received_idle_symbols,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
168 WORD16 *ptr_num_valid_out_bits,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
169 WORD16 *ptr_wait_interval,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
170 WORD16 *ptr_resync_detected,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
171 BOOL *ptr_early_muting_required,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
172 wait_for_sync_state_t *ptr_wait_state,
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
173 BOOL *sync_after_resync);
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
174 #endif
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
175
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
176
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
177
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
178
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
179 /* ----------------------------------------------------------------------- */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
180 /* Function generate_resync_sequence() */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
181 /* *********************************** */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
182 /* Generation of the sequence for resynchronization. The sequence, which */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
183 /* has a length according to the value of the constant RESYNC_SEQ_LENGTH, */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
184 /* is written to the vector *sequence, which must have been allocated */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
185 /* before calling this function. */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
186 /* ----------------------------------------------------------------------- */
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
187
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
188 void generate_resync_sequence(WORD16 *sequence);
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
189
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
190
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
191 #endif
b6a5e36de839 src/cs: initial import from Magnetite
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
192