kopia lustrzana https://github.com/sq8vps/vp-digi
160 wiersze
3.4 KiB
C
160 wiersze
3.4 KiB
C
/*
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Copyright 2020-2023 Piotr Wilkon
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This file is part of VP-Digi.
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VP-Digi 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 3 of the License, or
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(at your option) any later version.
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VP-Digi 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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You should have received a copy of the GNU General Public License
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along with VP-Digi. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef DRIVERS_MODEM_H_
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#define DRIVERS_MODEM_H_
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#include <stdint.h>
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//number of maximum parallel demodulators
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//each demodulator must be explicitly configured in code
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//currently used only for 1200 Bd modem
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#define MODEM_MAX_DEMODULATOR_COUNT 2
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enum ModemType
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{
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MODEM_1200 = 0,
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MODEM_1200_V23,
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MODEM_300,
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MODEM_9600,
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#ifdef ENABLE_PSK
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MODEM_BPSK_1200,
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MODEM_QPSK_1200,
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#endif
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};
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enum ModemTxTestMode
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{
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TEST_DISABLED,
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TEST_MARK,
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TEST_SPACE,
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TEST_ALTERNATING,
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};
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struct ModemDemodConfig
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{
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enum ModemType modem;
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uint8_t usePWM : 1; //0 - use R2R, 1 - use PWM
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uint8_t flatAudioIn : 1; //0 - normal (deemphasized) audio input, 1 - flat audio (unfiltered) input
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};
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extern struct ModemDemodConfig ModemConfig;
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enum ModemPrefilter
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{
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PREFILTER_NONE = 0,
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PREFILTER_PREEMPHASIS,
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PREFILTER_DEEMPHASIS,
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PREFILTER_FLAT,
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};
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void pushSample(float s);
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/**
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* @brief Get measured signal level
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* @param modem Modem number
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* @param *peak Output signal positive peak in %
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* @param *valley Output signal negative peak in %
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* @param *level Output signal level in %
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*/
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void ModemGetSignalLevel(uint8_t modem, int8_t *peak, int8_t *valley, uint8_t *level);
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/**
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* @brief Get current modem baudrate
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* @return Baudrate
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*/
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float ModemGetBaudrate(void);
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/**
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* @brief Get count of demodulators running in parallel
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* @return Count of demodulators
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*/
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uint8_t ModemGetDemodulatorCount(void);
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/**
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* @brief Get prefilter type (preemphasis, deemphasis etc.) for given modem
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* @param modem Modem number
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* @return Filter type
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*/
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enum ModemPrefilter ModemGetFilterType(uint8_t modem);
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/**
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* @brief Get current DCD state
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* @return 1 if channel busy, 0 if free
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*/
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uint8_t ModemDcdState(void);
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/**
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* @brief Check if there is a TX test mode enabled
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* @return 1 if in TX test mode, 0 otherwise
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*/
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uint8_t ModemIsTxTestOngoing(void);
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/**
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* @brief Clear modem RMS counter
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* @param number Modem number
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*/
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void ModemClearRMS(uint8_t number);
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/**
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* @brief Get RMS value for modem
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* @param number Modem number
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* @return RMS value
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*/
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uint16_t ModemGetRMS(uint8_t number);
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/**
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* @brief Start or restart TX test mode
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* @param type TX test type: TEST_MARK, TEST_SPACE or TEST_ALTERNATING
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*/
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void ModemTxTestStart(enum ModemTxTestMode type);
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/**
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* @brief Stop TX test mode
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*/
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void ModemTxTestStop(void);
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/**
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* @brief Configure and start TX
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* @info This function is used internally by protocol module.
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* @warning Use Ax25TransmitStart() to initialize transmission
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*/
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void ModemTransmitStart(void);
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/**
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* @brief Stop TX and go back to RX
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*/
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void ModemTransmitStop(void);
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/**
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* @brief Initialize modem module
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*/
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void ModemInit(void);
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#if (MODEM_DEMODULATOR_COUNT > 8)
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#error There may be at most 8 parallel demodulators/decoders
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#endif
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#endif
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