FreeCalypso > hg > fc-tourmaline
view src/cs/layer1/gtt_include/ctm/tonemod.h @ 291:a72feaed133a
PWT buzzer driver: conditionalize on TARGET_HAS_BUZZER
Here we add a new target config preprocessor symbol TARGET_HAS_BUZZER,
currently defined for c11x and c139; later we also expect to have it
on for FC Venus, and in FC Magnetite we are going to turn it on for
target dsample, just for the sake of completeness and philosophical
correctness.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sat, 26 Mar 2022 19:31:18 +0000 |
parents | 4e78acac3d88 |
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. * * Changes since October 13, 2000: * - The type mod_state_t includes a new member txbits_fifo_state now. * ******************************************************************************* * * File : tonemod.h * Purpose : header file for tonemod.c * ******************************************************************************* */ #ifndef tonemod_h #define tonemod_h "$Id: $" /* ******************************************************************************* * INCLUDE FILES ******************************************************************************* */ #include <fifo.h> /* ******************************************************************************* * DECLARATION OF PROTOTYPES ******************************************************************************* */ /* Define a type for the state variable of the function tonemod() */ typedef struct { WORD16 cntModulatedSamples; WORD16 actualBits[2]; fifo_state_t txbits_fifo_state; } mod_state_t; /* ---------------------------------------------------------------------- */ /* Function init_tonemod() */ /* *********************** */ /* This function has to be executed before tonemod() can be used. */ /* ---------------------------------------------------------------------- */ void init_tonemod(mod_state_t *mod_state); /* ---------------------------------------------------------------------- */ /* Function tonemod() */ /* ****************** */ /* Modulator of the Cellular Text Telephone Modem. */ /* The input vector bits_in must contain the bits that have to be */ /* transmitted. The length of bits_in must be even because always two */ /* bits are coded in parallel. */ /* Bits are either unipolar (i.e. {0, 1}) or bipolar (i.e. {-1, +1)}. */ /* The length of the output vector tones_out must be 20 times longer than */ /* the length of bits_in, since each pair of two bits is coded within a */ /* frame of 40 audio samples. */ /* ---------------------------------------------------------------------- */ void tonemod(WORD16 *tones_out, WORD16 *bits_in, WORD16 num_samples_tones_out, WORD16 num_bits_in, mod_state_t *mod_state); #endif