FreeCalypso > hg > fc-magnetite

annotate src/cs/layer1/gtt_include/ctm/m_sequence.h @ 662:8cd8fd15a095

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SIM speed enhancement re-enabled and made configurable TI's original code supported SIM speed enhancement, but Openmoko had it disabled, and OM's disabling of speed enhancement somehow caused certain SIM cards to start working which didn't work before (OM's bug #666). Because our FC community is much smaller in year 2020 than OM's community was in their day, we are not able to find one of those #666-affected SIMs, thus the real issue they had encountered remains elusive. Thus our solution is to re-enable SIM speed enhancement and simply wait for if and when someone runs into a #666-affected SIM once again. We provide a SIM_allow_speed_enhancement global variable that allows SIM speed enhancement to be enabled or disabled per session, and an /etc/SIM_spenh file in FFS that allows it to enabled or disabled on a non-volatile basis. SIM speed enhancement is now enabled by default.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 24 May 2020 05:02:28 +0000
parents 945cf7f506b2
children
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1 /*
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2 *******************************************************************************
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3 *
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4 * COPYRIGHT (C) 2000 BY ERICSSON EUROLAB DEUTSCHLAND GmbH
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5 * 90411 NUERNBERG, GERMANY, Tel Int + 49 911 5217 100
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6 *
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7 * The program(s) may be used and/or copied only with the
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8 * written permission from Ericsson or in accordance
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9 * with the terms and conditions stipulated in the agreement or
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10 * contract under which the program(s) have been supplied.
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11 *
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12 *******************************************************************************
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13 *
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14 * File : m_sequence.h
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15 * Purpose : Calculation of m-sequences
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16 * (maximum-length sequecnes or pseudo noise)
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17 *
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18 *******************************************************************************
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19 */
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20
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21 #ifndef m_sequence_h
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22 #define m_sequence_h "$Id: $"
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23
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24 /*
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25 *******************************************************************************
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26 * INCLUDE FILES
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27 *******************************************************************************
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28 */
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29
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30
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31 /*
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32 *******************************************************************************
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33 * DECLARATION OF PROTOTYPES
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34 *******************************************************************************
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35 */
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36
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37 /* -------------------------------------------------------------------- */
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38 /* function m_sequence() */
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39 /* ********************* */
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40 /* Calculates one period of an m-sequence (binary pseudo noise). */
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41 /* The sequence is stored in the vector sequence, which must have a */
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42 /* of (2^r)-1, where r is an integer number between 2 and 10. */
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43 /* Therefore, with this release of m_sequence, sequences of length */
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44 /* 3, 7, 15, 31, 63, 127, 255, 511, or 1023 can be generated. */
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45 /* The resulting sequence is bipolar, i.e. it has values -1 and +1. */
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46 /* -------------------------------------------------------------------- */
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47
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48 void m_sequence(WORD16 *sequence, WORD16 length);
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49
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50
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51 #endif
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52
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