mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
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103 lines
2.5 KiB
C++
103 lines
2.5 KiB
C++
/*
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* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
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*
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* This file is part of PortaPack.
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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, or (at your option)
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* 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; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __CLOCK_MANAGER_H__
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#define __CLOCK_MANAGER_H__
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#include "ch.h"
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#include "hal.h"
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#include "i2c_pp.hpp"
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#include "si5351.hpp"
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#include "lpc43xx_cpp.hpp"
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using namespace lpc43xx;
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class ClockManager {
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public:
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enum ReferenceSource {
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Xtal, /* 10 MHz crystal onboard the HackRF */
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PortaPack, /* 10 MHz TCXO on 20180820 and newer PortaPack revisions. */
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External, /* HackRF external clock input SMA, or from PortaPack with TCXO feature. */
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};
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using ReferenceFrequency = uint32_t;
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typedef struct {
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ReferenceSource source;
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ReferenceFrequency frequency;
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} Reference;
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constexpr ClockManager(
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I2C& i2c0,
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si5351::Si5351& clock_generator
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) : i2c0(i2c0),
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clock_generator(clock_generator),
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reference({ReferenceSource::Xtal, 10000000})
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{
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}
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void init_clock_generator();
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void shutdown();
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void start_audio_pll();
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void stop_audio_pll();
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void set_base_audio_clock_divider(const size_t divisor);
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void enable_codec_clocks();
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void disable_codec_clocks();
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void enable_if_clocks();
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void disable_if_clocks();
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void set_sampling_frequency(const uint32_t frequency);
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void set_reference_ppb(const int32_t ppb);
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uint32_t get_frequency_monitor_measurement_in_hertz();
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Reference get_reference() const;
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void enable_clock_output(bool enable);
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private:
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I2C& i2c0;
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si5351::Si5351& clock_generator;
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Reference reference;
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void set_gp_clkin_to_clkin_direct();
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void start_frequency_monitor_measurement(const cgu::CLK_SEL clk_sel);
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void wait_For_frequency_monitor_measurement_done();
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void set_m4_clock_to_irc();
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void set_m4_clock_to_pll1();
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uint32_t measure_gp_clkin_frequency();
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ReferenceSource detect_reference_source();
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Reference choose_reference();
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bool loss_of_signal();
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};
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#endif/*__CLOCK_MANAGER_H__*/
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