FreeCalypso > hg > fc-magnetite
view src/cs/layer1/gtt_include/ctm/m_sequence.h @ 701:35e7f9d0379f
targets: add TARGET_HAS_BUZZER to c11x, c139 and dsample
This new target config preprocessor symbol was introduced in Tourmaline
in connection with the new approach to playing buzzer melodies via PWT,
properly omitting the responsible code on targets where BU output
controls the vibrator instead. That code is not present in Magnetite
and we have no plans to backport it here, but target header files
should be kept consistent between the two trees, especially given
that we plan to support FC Venus target in Magnetite.
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Sat, 26 Mar 2022 19:51:34 +0000 |
| parents | 945cf7f506b2 |
| children |
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/* ******************************************************************************* * * COPYRIGHT (C) 2000 BY ERICSSON EUROLAB DEUTSCHLAND GmbH * 90411 NUERNBERG, GERMANY, Tel Int + 49 911 5217 100 * * The program(s) may be used and/or copied only with the * written permission from Ericsson or in accordance * with the terms and conditions stipulated in the agreement or * contract under which the program(s) have been supplied. * ******************************************************************************* * * File : m_sequence.h * Purpose : Calculation of m-sequences * (maximum-length sequecnes or pseudo noise) * ******************************************************************************* */ #ifndef m_sequence_h #define m_sequence_h "$Id: $" /* ******************************************************************************* * INCLUDE FILES ******************************************************************************* */ /* ******************************************************************************* * DECLARATION OF PROTOTYPES ******************************************************************************* */ /* -------------------------------------------------------------------- */ /* function m_sequence() */ /* ********************* */ /* Calculates one period of an m-sequence (binary pseudo noise). */ /* The sequence is stored in the vector sequence, which must have a */ /* of (2^r)-1, where r is an integer number between 2 and 10. */ /* Therefore, with this release of m_sequence, sequences of length */ /* 3, 7, 15, 31, 63, 127, 255, 511, or 1023 can be generated. */ /* The resulting sequence is bipolar, i.e. it has values -1 and +1. */ /* -------------------------------------------------------------------- */ void m_sequence(WORD16 *sequence, WORD16 length); #endif