kopia lustrzana https://github.com/markondej/fm_transmitter
84 wiersze
3.6 KiB
C++
84 wiersze
3.6 KiB
C++
/*
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fm_transmitter - use Raspberry Pi as FM transmitter
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Copyright (c) 2019, Marcin Kondej
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All rights reserved.
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See https://github.com/markondej/fm_transmitter
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Redistribution and use in source and binary forms, with or without modification, are
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permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this list
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of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice, this
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list of conditions and the following disclaimer in the documentation and/or other
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materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors may be
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used to endorse or promote products derived from this software without specific
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prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
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TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
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WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TRANSMITTER_HPP
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#define TRANSMITTER_HPP
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#include "wave_reader.hpp"
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struct AllocatedMemory;
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struct PWMRegisters;
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struct DMARegisters;
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struct DMAControllBlock;
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struct ClockRegisters;
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class Transmitter
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{
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public:
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virtual ~Transmitter();
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Transmitter(const Transmitter &source) = delete;
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Transmitter &operator=(const Transmitter &source) = delete;
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static Transmitter &getInstance();
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void transmit(WaveReader &reader, double frequency, double bandwidth, uint8_t dmaChannel, bool preserveCarrierOnExit);
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void stop();
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private:
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Transmitter();
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uint32_t getPeripheralsVirtBaseAddress();
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uint32_t getPeripheralsSize();
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double getSourceFreq();
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uint32_t getPeripheralPhysAddress(volatile void *object);
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static uint32_t getPeripheralVirtAddress(uint32_t offset);
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uint32_t getMemoryPhysAddress(AllocatedMemory &memory, volatile void *object);
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AllocatedMemory allocateMemory(uint32_t size);
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void freeMemory(AllocatedMemory &memory);
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volatile PWMRegisters *initPwmController();
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void closePwmController(volatile PWMRegisters *pwm);
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volatile DMARegisters *startDma(AllocatedMemory &memory, volatile DMAControllBlock *dmaCb, uint8_t dmaChannel);
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void closeDma(volatile DMARegisters *dma);
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volatile ClockRegisters *initClockOutput();
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void closeClockOutput(volatile ClockRegisters *clock);
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void transmitViaCpu(WaveReader &reader, uint32_t bufferSize);
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void transmitViaDma(WaveReader &reader, uint32_t bufferSize, uint8_t dmaChannel);
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static void transmitThread();
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bool clockInitialized, preserveCarrier;
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static void *peripherals;
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static bool transmitting;
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static uint32_t sampleOffset, clockDivisor, divisorRange, sampleRate;
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static volatile ClockRegisters *output;
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static std::vector<Sample> *buffer;
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};
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#endif // TRANSMITTER_HPP
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