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simons |
/*****************************************************************************/
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/*
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* sm_hapn4800.c -- soundcard radio modem driver, 4800 baud HAPN modem
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*
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* Copyright (C) 1996 Thomas Sailer (sailer@ife.ee.ethz.ch)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* Please note that the GPL allows you to use the driver, NOT the radio.
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* In order to use the radio, you need a license from the communications
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* authority of your country.
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*
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*
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* This module implements a (hopefully) HAPN (Hamilton Area Packet
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* Network) compatible 4800 baud modem.
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* The HAPN modem uses kind of "duobinary signalling" (not really,
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* duobinary signalling gives ... 0 0 -1 0 1 0 0 ... at the sampling
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* instants, whereas HAPN signalling gives ... 0 0 -1 1 0 0 ..., see
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* Proakis, Digital Communications).
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* The code is untested. It is compatible with itself (i.e. it can decode
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* the packets it sent), but I could not test if it is compatible with
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* any "real" HAPN modem, since noone uses it in my region of the world.
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* Feedback therefore welcome.
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*/
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#include "sm.h"
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#include "sm_tbl_hapn4800.h"
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/* --------------------------------------------------------------------- */
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struct demod_state_hapn48 {
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unsigned int shreg;
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unsigned int bit_pll;
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unsigned char last_bit;
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unsigned char last_bit2;
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unsigned int dcd_shreg;
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int dcd_sum0, dcd_sum1, dcd_sum2;
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unsigned int dcd_time;
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int lvlhi, lvllo;
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};
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struct mod_state_hapn48 {
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unsigned int shreg;
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unsigned char tx_bit;
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unsigned int tx_seq;
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const unsigned char *tbl;
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};
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/* --------------------------------------------------------------------- */
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static void modulator_hapn4800_10_u8(struct sm_state *sm, unsigned char *buf, unsigned int buflen)
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{
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struct mod_state_hapn48 *st = (struct mod_state_hapn48 *)(&sm->m);
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for (; buflen > 0; buflen--, buf++) {
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if (!st->tx_seq++) {
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if (st->shreg <= 1)
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st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
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st->tx_bit = ((st->tx_bit << 1) |
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(st->tx_bit & 1));
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st->tx_bit ^= (!(st->shreg & 1));
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st->shreg >>= 1;
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st->tbl = hapn48_txfilt_10 + (st->tx_bit & 0xf);
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}
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if (st->tx_seq >= 10)
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st->tx_seq = 0;
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*buf = *st->tbl;
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st->tbl += 0x10;
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}
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}
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/* --------------------------------------------------------------------- */
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static void modulator_hapn4800_10_s16(struct sm_state *sm, short *buf, unsigned int buflen)
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{
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struct mod_state_hapn48 *st = (struct mod_state_hapn48 *)(&sm->m);
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for (; buflen > 0; buflen--, buf++) {
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if (!st->tx_seq++) {
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if (st->shreg <= 1)
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st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
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st->tx_bit = ((st->tx_bit << 1) |
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(st->tx_bit & 1));
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st->tx_bit ^= (!(st->shreg & 1));
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st->shreg >>= 1;
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st->tbl = hapn48_txfilt_10 + (st->tx_bit & 0xf);
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}
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if (st->tx_seq >= 10)
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st->tx_seq = 0;
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*buf = ((*st->tbl)-0x80)<<8;
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st->tbl += 0x10;
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}
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}
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/* --------------------------------------------------------------------- */
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static void modulator_hapn4800_8_u8(struct sm_state *sm, unsigned char *buf, unsigned int buflen)
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{
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struct mod_state_hapn48 *st = (struct mod_state_hapn48 *)(&sm->m);
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for (; buflen > 0; buflen--, buf++) {
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if (!st->tx_seq++) {
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if (st->shreg <= 1)
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st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
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st->tx_bit = (st->tx_bit << 1) | (st->tx_bit & 1);
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st->tx_bit ^= !(st->shreg & 1);
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st->shreg >>= 1;
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st->tbl = hapn48_txfilt_8 + (st->tx_bit & 0xf);
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}
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if (st->tx_seq >= 8)
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st->tx_seq = 0;
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*buf = *st->tbl;
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st->tbl += 0x10;
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}
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}
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/* --------------------------------------------------------------------- */
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static void modulator_hapn4800_8_s16(struct sm_state *sm, short *buf, unsigned int buflen)
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{
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struct mod_state_hapn48 *st = (struct mod_state_hapn48 *)(&sm->m);
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for (; buflen > 0; buflen--, buf++) {
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if (!st->tx_seq++) {
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if (st->shreg <= 1)
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st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
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st->tx_bit = (st->tx_bit << 1) | (st->tx_bit & 1);
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st->tx_bit ^= !(st->shreg & 1);
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st->shreg >>= 1;
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st->tbl = hapn48_txfilt_8 + (st->tx_bit & 0xf);
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}
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if (st->tx_seq >= 8)
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st->tx_seq = 0;
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*buf = ((*st->tbl)-0x80)<<8;
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st->tbl += 0x10;
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}
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}
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/* --------------------------------------------------------------------- */
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static void modulator_hapn4800_pm10_u8(struct sm_state *sm, unsigned char *buf, unsigned int buflen)
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{
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struct mod_state_hapn48 *st = (struct mod_state_hapn48 *)(&sm->m);
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for (; buflen > 0; buflen--, buf++) {
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if (!st->tx_seq++) {
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if (st->shreg <= 1)
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st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
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st->tx_bit = ((st->tx_bit << 1) |
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(st->tx_bit & 1));
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st->tx_bit ^= (!(st->shreg & 1));
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st->shreg >>= 1;
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st->tbl = hapn48_txfilt_pm10 + (st->tx_bit & 0xf);
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}
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if (st->tx_seq >= 10)
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st->tx_seq = 0;
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*buf = *st->tbl;
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st->tbl += 0x10;
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}
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}
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/* --------------------------------------------------------------------- */
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static void modulator_hapn4800_pm10_s16(struct sm_state *sm, short *buf, unsigned int buflen)
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{
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struct mod_state_hapn48 *st = (struct mod_state_hapn48 *)(&sm->m);
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for (; buflen > 0; buflen--, buf++) {
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if (!st->tx_seq++) {
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if (st->shreg <= 1)
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st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
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st->tx_bit = ((st->tx_bit << 1) |
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(st->tx_bit & 1));
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st->tx_bit ^= (!(st->shreg & 1));
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st->shreg >>= 1;
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st->tbl = hapn48_txfilt_pm10 + (st->tx_bit & 0xf);
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}
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if (st->tx_seq >= 10)
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st->tx_seq = 0;
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*buf = ((*st->tbl)-0x80)<<8;
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st->tbl += 0x10;
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}
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}
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/* --------------------------------------------------------------------- */
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static void modulator_hapn4800_pm8_u8(struct sm_state *sm, unsigned char *buf, unsigned int buflen)
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{
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struct mod_state_hapn48 *st = (struct mod_state_hapn48 *)(&sm->m);
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for (; buflen > 0; buflen--, buf++) {
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if (!st->tx_seq++) {
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if (st->shreg <= 1)
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st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
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st->tx_bit = (st->tx_bit << 1) | (st->tx_bit & 1);
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st->tx_bit ^= !(st->shreg & 1);
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st->shreg >>= 1;
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st->tbl = hapn48_txfilt_pm8 + (st->tx_bit & 0xf);
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}
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if (st->tx_seq >= 8)
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st->tx_seq = 0;
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*buf = *st->tbl;
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st->tbl += 0x10;
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}
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}
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/* --------------------------------------------------------------------- */
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static void modulator_hapn4800_pm8_s16(struct sm_state *sm, short *buf, unsigned int buflen)
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{
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struct mod_state_hapn48 *st = (struct mod_state_hapn48 *)(&sm->m);
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for (; buflen > 0; buflen--, buf++) {
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if (!st->tx_seq++) {
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if (st->shreg <= 1)
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st->shreg = hdlcdrv_getbits(&sm->hdrv) | 0x10000;
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st->tx_bit = (st->tx_bit << 1) | (st->tx_bit & 1);
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st->tx_bit ^= !(st->shreg & 1);
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st->shreg >>= 1;
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st->tbl = hapn48_txfilt_pm8 + (st->tx_bit & 0xf);
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}
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if (st->tx_seq >= 8)
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st->tx_seq = 0;
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*buf = ((*st->tbl)-0x80)<<8;
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st->tbl += 0x10;
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}
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}
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/* --------------------------------------------------------------------- */
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static void demodulator_hapn4800_10_u8(struct sm_state *sm, const unsigned char *buf, unsigned int buflen)
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{
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struct demod_state_hapn48 *st = (struct demod_state_hapn48 *)(&sm->d);
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static const int pll_corr[2] = { -0x800, 0x800 };
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int curst, cursync;
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int inv;
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for (; buflen > 0; buflen--, buf++) {
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inv = ((int)(buf[-2])-0x80) << 8;
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st->lvlhi = (st->lvlhi * 65309) >> 16; /* decay */
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st->lvllo = (st->lvllo * 65309) >> 16; /* decay */
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if (inv > st->lvlhi)
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st->lvlhi = inv;
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if (inv < st->lvllo)
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st->lvllo = inv;
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if (buflen & 1)
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st->dcd_shreg <<= 1;
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st->bit_pll += 0x199a;
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| 262 |
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curst = cursync = 0;
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| 263 |
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if (inv > st->lvlhi >> 1) {
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| 264 |
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curst = 1;
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| 265 |
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cursync = (buf[-2] > buf[-1] && buf[-2] > buf[-3] &&
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| 266 |
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buf[-2] > buf[-0] && buf[-2] > buf[-4]);
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| 267 |
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} else if (inv < st->lvllo >> 1) {
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| 268 |
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curst = -1;
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| 269 |
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cursync = (buf[-2] < buf[-1] && buf[-2] < buf[-3] &&
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| 270 |
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buf[-2] < buf[-0] && buf[-2] < buf[-4]);
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| 271 |
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}
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| 272 |
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if (cursync) {
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| 273 |
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st->dcd_shreg |= cursync;
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| 274 |
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st->bit_pll += pll_corr[((st->bit_pll - 0x8000u) & 0xffffu) < 0x8ccdu];
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| 275 |
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st->dcd_sum0 += 16 * hweight32(st->dcd_shreg & 0x18c6318c) -
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| 276 |
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hweight32(st->dcd_shreg & 0xe739ce70);
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| 277 |
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}
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| 278 |
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hdlcdrv_channelbit(&sm->hdrv, cursync);
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| 279 |
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if ((--st->dcd_time) <= 0) {
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| 280 |
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hdlcdrv_setdcd(&sm->hdrv, (st->dcd_sum0 +
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| 281 |
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st->dcd_sum1 +
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| 282 |
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st->dcd_sum2) < 0);
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| 283 |
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st->dcd_sum2 = st->dcd_sum1;
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| 284 |
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st->dcd_sum1 = st->dcd_sum0;
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| 285 |
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st->dcd_sum0 = 2; /* slight bias */
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| 286 |
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st->dcd_time = 240;
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| 287 |
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}
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| 288 |
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if (st->bit_pll >= 0x10000) {
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| 289 |
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st->bit_pll &= 0xffff;
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| 290 |
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st->last_bit2 = st->last_bit;
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| 291 |
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if (curst < 0)
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| 292 |
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st->last_bit = 0;
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| 293 |
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else if (curst > 0)
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| 294 |
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st->last_bit = 1;
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| 295 |
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st->shreg >>= 1;
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| 296 |
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st->shreg |= ((st->last_bit ^ st->last_bit2 ^ 1) & 1) << 16;
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| 297 |
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if (st->shreg & 1) {
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| 298 |
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hdlcdrv_putbits(&sm->hdrv, st->shreg >> 1);
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| 299 |
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st->shreg = 0x10000;
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| 300 |
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}
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| 301 |
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diag_trigger(sm);
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| 302 |
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}
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| 303 |
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diag_add_one(sm, inv);
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| 304 |
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}
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| 305 |
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}
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| 306 |
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| 307 |
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/* --------------------------------------------------------------------- */
|
| 308 |
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| 309 |
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static void demodulator_hapn4800_10_s16(struct sm_state *sm, const short *buf, unsigned int buflen)
|
| 310 |
|
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{
|
| 311 |
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struct demod_state_hapn48 *st = (struct demod_state_hapn48 *)(&sm->d);
|
| 312 |
|
|
static const int pll_corr[2] = { -0x800, 0x800 };
|
| 313 |
|
|
int curst, cursync;
|
| 314 |
|
|
int inv;
|
| 315 |
|
|
|
| 316 |
|
|
for (; buflen > 0; buflen--, buf++) {
|
| 317 |
|
|
inv = buf[-2];
|
| 318 |
|
|
st->lvlhi = (st->lvlhi * 65309) >> 16; /* decay */
|
| 319 |
|
|
st->lvllo = (st->lvllo * 65309) >> 16; /* decay */
|
| 320 |
|
|
if (inv > st->lvlhi)
|
| 321 |
|
|
st->lvlhi = inv;
|
| 322 |
|
|
if (inv < st->lvllo)
|
| 323 |
|
|
st->lvllo = inv;
|
| 324 |
|
|
if (buflen & 1)
|
| 325 |
|
|
st->dcd_shreg <<= 1;
|
| 326 |
|
|
st->bit_pll += 0x199a;
|
| 327 |
|
|
curst = cursync = 0;
|
| 328 |
|
|
if (inv > st->lvlhi >> 1) {
|
| 329 |
|
|
curst = 1;
|
| 330 |
|
|
cursync = (buf[-2] > buf[-1] && buf[-2] > buf[-3] &&
|
| 331 |
|
|
buf[-2] > buf[-0] && buf[-2] > buf[-4]);
|
| 332 |
|
|
} else if (inv < st->lvllo >> 1) {
|
| 333 |
|
|
curst = -1;
|
| 334 |
|
|
cursync = (buf[-2] < buf[-1] && buf[-2] < buf[-3] &&
|
| 335 |
|
|
buf[-2] < buf[-0] && buf[-2] < buf[-4]);
|
| 336 |
|
|
}
|
| 337 |
|
|
if (cursync) {
|
| 338 |
|
|
st->dcd_shreg |= cursync;
|
| 339 |
|
|
st->bit_pll += pll_corr[((st->bit_pll - 0x8000u) & 0xffffu) < 0x8ccdu];
|
| 340 |
|
|
st->dcd_sum0 += 16 * hweight32(st->dcd_shreg & 0x18c6318c) -
|
| 341 |
|
|
hweight32(st->dcd_shreg & 0xe739ce70);
|
| 342 |
|
|
}
|
| 343 |
|
|
hdlcdrv_channelbit(&sm->hdrv, cursync);
|
| 344 |
|
|
if ((--st->dcd_time) <= 0) {
|
| 345 |
|
|
hdlcdrv_setdcd(&sm->hdrv, (st->dcd_sum0 +
|
| 346 |
|
|
st->dcd_sum1 +
|
| 347 |
|
|
st->dcd_sum2) < 0);
|
| 348 |
|
|
st->dcd_sum2 = st->dcd_sum1;
|
| 349 |
|
|
st->dcd_sum1 = st->dcd_sum0;
|
| 350 |
|
|
st->dcd_sum0 = 2; /* slight bias */
|
| 351 |
|
|
st->dcd_time = 240;
|
| 352 |
|
|
}
|
| 353 |
|
|
if (st->bit_pll >= 0x10000) {
|
| 354 |
|
|
st->bit_pll &= 0xffff;
|
| 355 |
|
|
st->last_bit2 = st->last_bit;
|
| 356 |
|
|
if (curst < 0)
|
| 357 |
|
|
st->last_bit = 0;
|
| 358 |
|
|
else if (curst > 0)
|
| 359 |
|
|
st->last_bit = 1;
|
| 360 |
|
|
st->shreg >>= 1;
|
| 361 |
|
|
st->shreg |= ((st->last_bit ^ st->last_bit2 ^ 1) & 1) << 16;
|
| 362 |
|
|
if (st->shreg & 1) {
|
| 363 |
|
|
hdlcdrv_putbits(&sm->hdrv, st->shreg >> 1);
|
| 364 |
|
|
st->shreg = 0x10000;
|
| 365 |
|
|
}
|
| 366 |
|
|
diag_trigger(sm);
|
| 367 |
|
|
}
|
| 368 |
|
|
diag_add_one(sm, inv);
|
| 369 |
|
|
}
|
| 370 |
|
|
}
|
| 371 |
|
|
|
| 372 |
|
|
/* --------------------------------------------------------------------- */
|
| 373 |
|
|
|
| 374 |
|
|
static void demodulator_hapn4800_8_u8(struct sm_state *sm, const unsigned char *buf, unsigned int buflen)
|
| 375 |
|
|
{
|
| 376 |
|
|
struct demod_state_hapn48 *st = (struct demod_state_hapn48 *)(&sm->d);
|
| 377 |
|
|
static const int pll_corr[2] = { -0x800, 0x800 };
|
| 378 |
|
|
int curst, cursync;
|
| 379 |
|
|
int inv;
|
| 380 |
|
|
|
| 381 |
|
|
for (; buflen > 0; buflen--, buf++) {
|
| 382 |
|
|
inv = ((int)(buf[-2])-0x80) << 8;
|
| 383 |
|
|
st->lvlhi = (st->lvlhi * 65309) >> 16; /* decay */
|
| 384 |
|
|
st->lvllo = (st->lvllo * 65309) >> 16; /* decay */
|
| 385 |
|
|
if (inv > st->lvlhi)
|
| 386 |
|
|
st->lvlhi = inv;
|
| 387 |
|
|
if (inv < st->lvllo)
|
| 388 |
|
|
st->lvllo = inv;
|
| 389 |
|
|
if (buflen & 1)
|
| 390 |
|
|
st->dcd_shreg <<= 1;
|
| 391 |
|
|
st->bit_pll += 0x2000;
|
| 392 |
|
|
curst = cursync = 0;
|
| 393 |
|
|
if (inv > st->lvlhi >> 1) {
|
| 394 |
|
|
curst = 1;
|
| 395 |
|
|
cursync = (buf[-2] > buf[-1] && buf[-2] > buf[-3] &&
|
| 396 |
|
|
buf[-2] > buf[-0] && buf[-2] > buf[-4]);
|
| 397 |
|
|
} else if (inv < st->lvllo >> 1) {
|
| 398 |
|
|
curst = -1;
|
| 399 |
|
|
cursync = (buf[-2] < buf[-1] && buf[-2] < buf[-3] &&
|
| 400 |
|
|
buf[-2] < buf[-0] && buf[-2] < buf[-4]);
|
| 401 |
|
|
}
|
| 402 |
|
|
if (cursync) {
|
| 403 |
|
|
st->dcd_shreg |= cursync;
|
| 404 |
|
|
st->bit_pll += pll_corr[((st->bit_pll - 0x8000u) & 0xffffu) < 0x9000u];
|
| 405 |
|
|
st->dcd_sum0 += 16 * hweight32(st->dcd_shreg & 0x44444444) -
|
| 406 |
|
|
hweight32(st->dcd_shreg & 0xbbbbbbbb);
|
| 407 |
|
|
}
|
| 408 |
|
|
hdlcdrv_channelbit(&sm->hdrv, cursync);
|
| 409 |
|
|
if ((--st->dcd_time) <= 0) {
|
| 410 |
|
|
hdlcdrv_setdcd(&sm->hdrv, (st->dcd_sum0 +
|
| 411 |
|
|
st->dcd_sum1 +
|
| 412 |
|
|
st->dcd_sum2) < 0);
|
| 413 |
|
|
st->dcd_sum2 = st->dcd_sum1;
|
| 414 |
|
|
st->dcd_sum1 = st->dcd_sum0;
|
| 415 |
|
|
st->dcd_sum0 = 2; /* slight bias */
|
| 416 |
|
|
st->dcd_time = 240;
|
| 417 |
|
|
}
|
| 418 |
|
|
if (st->bit_pll >= 0x10000) {
|
| 419 |
|
|
st->bit_pll &= 0xffff;
|
| 420 |
|
|
st->last_bit2 = st->last_bit;
|
| 421 |
|
|
if (curst < 0)
|
| 422 |
|
|
st->last_bit = 0;
|
| 423 |
|
|
else if (curst > 0)
|
| 424 |
|
|
st->last_bit = 1;
|
| 425 |
|
|
st->shreg >>= 1;
|
| 426 |
|
|
st->shreg |= ((st->last_bit ^ st->last_bit2 ^ 1) & 1) << 16;
|
| 427 |
|
|
if (st->shreg & 1) {
|
| 428 |
|
|
hdlcdrv_putbits(&sm->hdrv, st->shreg >> 1);
|
| 429 |
|
|
st->shreg = 0x10000;
|
| 430 |
|
|
}
|
| 431 |
|
|
diag_trigger(sm);
|
| 432 |
|
|
}
|
| 433 |
|
|
diag_add_one(sm, inv);
|
| 434 |
|
|
}
|
| 435 |
|
|
}
|
| 436 |
|
|
|
| 437 |
|
|
/* --------------------------------------------------------------------- */
|
| 438 |
|
|
|
| 439 |
|
|
static void demodulator_hapn4800_8_s16(struct sm_state *sm, const short *buf, unsigned int buflen)
|
| 440 |
|
|
{
|
| 441 |
|
|
struct demod_state_hapn48 *st = (struct demod_state_hapn48 *)(&sm->d);
|
| 442 |
|
|
static const int pll_corr[2] = { -0x800, 0x800 };
|
| 443 |
|
|
int curst, cursync;
|
| 444 |
|
|
int inv;
|
| 445 |
|
|
|
| 446 |
|
|
for (; buflen > 0; buflen--, buf++) {
|
| 447 |
|
|
inv = buf[-2];
|
| 448 |
|
|
st->lvlhi = (st->lvlhi * 65309) >> 16; /* decay */
|
| 449 |
|
|
st->lvllo = (st->lvllo * 65309) >> 16; /* decay */
|
| 450 |
|
|
if (inv > st->lvlhi)
|
| 451 |
|
|
st->lvlhi = inv;
|
| 452 |
|
|
if (inv < st->lvllo)
|
| 453 |
|
|
st->lvllo = inv;
|
| 454 |
|
|
if (buflen & 1)
|
| 455 |
|
|
st->dcd_shreg <<= 1;
|
| 456 |
|
|
st->bit_pll += 0x2000;
|
| 457 |
|
|
curst = cursync = 0;
|
| 458 |
|
|
if (inv > st->lvlhi >> 1) {
|
| 459 |
|
|
curst = 1;
|
| 460 |
|
|
cursync = (buf[-2] > buf[-1] && buf[-2] > buf[-3] &&
|
| 461 |
|
|
buf[-2] > buf[-0] && buf[-2] > buf[-4]);
|
| 462 |
|
|
} else if (inv < st->lvllo >> 1) {
|
| 463 |
|
|
curst = -1;
|
| 464 |
|
|
cursync = (buf[-2] < buf[-1] && buf[-2] < buf[-3] &&
|
| 465 |
|
|
buf[-2] < buf[-0] && buf[-2] < buf[-4]);
|
| 466 |
|
|
}
|
| 467 |
|
|
if (cursync) {
|
| 468 |
|
|
st->dcd_shreg |= cursync;
|
| 469 |
|
|
st->bit_pll += pll_corr[((st->bit_pll - 0x8000u) & 0xffffu) < 0x9000u];
|
| 470 |
|
|
st->dcd_sum0 += 16 * hweight32(st->dcd_shreg & 0x44444444) -
|
| 471 |
|
|
hweight32(st->dcd_shreg & 0xbbbbbbbb);
|
| 472 |
|
|
}
|
| 473 |
|
|
hdlcdrv_channelbit(&sm->hdrv, cursync);
|
| 474 |
|
|
if ((--st->dcd_time) <= 0) {
|
| 475 |
|
|
hdlcdrv_setdcd(&sm->hdrv, (st->dcd_sum0 +
|
| 476 |
|
|
st->dcd_sum1 +
|
| 477 |
|
|
st->dcd_sum2) < 0);
|
| 478 |
|
|
st->dcd_sum2 = st->dcd_sum1;
|
| 479 |
|
|
st->dcd_sum1 = st->dcd_sum0;
|
| 480 |
|
|
st->dcd_sum0 = 2; /* slight bias */
|
| 481 |
|
|
st->dcd_time = 240;
|
| 482 |
|
|
}
|
| 483 |
|
|
if (st->bit_pll >= 0x10000) {
|
| 484 |
|
|
st->bit_pll &= 0xffff;
|
| 485 |
|
|
st->last_bit2 = st->last_bit;
|
| 486 |
|
|
if (curst < 0)
|
| 487 |
|
|
st->last_bit = 0;
|
| 488 |
|
|
else if (curst > 0)
|
| 489 |
|
|
st->last_bit = 1;
|
| 490 |
|
|
st->shreg >>= 1;
|
| 491 |
|
|
st->shreg |= ((st->last_bit ^ st->last_bit2 ^ 1) & 1) << 16;
|
| 492 |
|
|
if (st->shreg & 1) {
|
| 493 |
|
|
hdlcdrv_putbits(&sm->hdrv, st->shreg >> 1);
|
| 494 |
|
|
st->shreg = 0x10000;
|
| 495 |
|
|
}
|
| 496 |
|
|
diag_trigger(sm);
|
| 497 |
|
|
}
|
| 498 |
|
|
diag_add_one(sm, inv);
|
| 499 |
|
|
}
|
| 500 |
|
|
}
|
| 501 |
|
|
|
| 502 |
|
|
/* --------------------------------------------------------------------- */
|
| 503 |
|
|
|
| 504 |
|
|
static void demod_init_hapn4800(struct sm_state *sm)
|
| 505 |
|
|
{
|
| 506 |
|
|
struct demod_state_hapn48 *st = (struct demod_state_hapn48 *)(&sm->d);
|
| 507 |
|
|
|
| 508 |
|
|
st->dcd_time = 120;
|
| 509 |
|
|
st->dcd_sum0 = 2;
|
| 510 |
|
|
}
|
| 511 |
|
|
|
| 512 |
|
|
/* --------------------------------------------------------------------- */
|
| 513 |
|
|
|
| 514 |
|
|
const struct modem_tx_info sm_hapn4800_8_tx = {
|
| 515 |
|
|
"hapn4800", sizeof(struct mod_state_hapn48), 38400, 4800,
|
| 516 |
|
|
modulator_hapn4800_8_u8, modulator_hapn4800_8_s16, NULL
|
| 517 |
|
|
};
|
| 518 |
|
|
|
| 519 |
|
|
const struct modem_rx_info sm_hapn4800_8_rx = {
|
| 520 |
|
|
"hapn4800", sizeof(struct demod_state_hapn48), 38400, 4800, 5, 8,
|
| 521 |
|
|
demodulator_hapn4800_8_u8, demodulator_hapn4800_8_s16, demod_init_hapn4800
|
| 522 |
|
|
};
|
| 523 |
|
|
|
| 524 |
|
|
/* --------------------------------------------------------------------- */
|
| 525 |
|
|
|
| 526 |
|
|
const struct modem_tx_info sm_hapn4800_10_tx = {
|
| 527 |
|
|
"hapn4800", sizeof(struct mod_state_hapn48), 48000, 4800,
|
| 528 |
|
|
modulator_hapn4800_10_u8, modulator_hapn4800_10_s16, NULL
|
| 529 |
|
|
};
|
| 530 |
|
|
|
| 531 |
|
|
const struct modem_rx_info sm_hapn4800_10_rx = {
|
| 532 |
|
|
"hapn4800", sizeof(struct demod_state_hapn48), 48000, 4800, 5, 10,
|
| 533 |
|
|
demodulator_hapn4800_10_u8, demodulator_hapn4800_10_s16, demod_init_hapn4800
|
| 534 |
|
|
};
|
| 535 |
|
|
|
| 536 |
|
|
/* --------------------------------------------------------------------- */
|
| 537 |
|
|
|
| 538 |
|
|
const struct modem_tx_info sm_hapn4800_pm8_tx = {
|
| 539 |
|
|
"hapn4800pm", sizeof(struct mod_state_hapn48), 38400, 4800,
|
| 540 |
|
|
modulator_hapn4800_pm8_u8, modulator_hapn4800_pm8_s16, NULL
|
| 541 |
|
|
};
|
| 542 |
|
|
|
| 543 |
|
|
const struct modem_rx_info sm_hapn4800_pm8_rx = {
|
| 544 |
|
|
"hapn4800pm", sizeof(struct demod_state_hapn48), 38400, 4800, 5, 8,
|
| 545 |
|
|
demodulator_hapn4800_8_u8, demodulator_hapn4800_8_s16, demod_init_hapn4800
|
| 546 |
|
|
};
|
| 547 |
|
|
|
| 548 |
|
|
/* --------------------------------------------------------------------- */
|
| 549 |
|
|
|
| 550 |
|
|
const struct modem_tx_info sm_hapn4800_pm10_tx = {
|
| 551 |
|
|
"hapn4800pm", sizeof(struct mod_state_hapn48), 48000, 4800,
|
| 552 |
|
|
modulator_hapn4800_pm10_u8, modulator_hapn4800_pm10_s16, NULL
|
| 553 |
|
|
};
|
| 554 |
|
|
|
| 555 |
|
|
const struct modem_rx_info sm_hapn4800_pm10_rx = {
|
| 556 |
|
|
"hapn4800pm", sizeof(struct demod_state_hapn48), 48000, 4800, 5, 10,
|
| 557 |
|
|
demodulator_hapn4800_10_u8, demodulator_hapn4800_10_s16, demod_init_hapn4800
|
| 558 |
|
|
};
|
| 559 |
|
|
|
| 560 |
|
|
/* --------------------------------------------------------------------- */
|
