71 lines
1.7 KiB
C++
71 lines
1.7 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 __RFFC507X_SPI_H__
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#define __RFFC507X_SPI_H__
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#include <cstdint>
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#include <cstddef>
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namespace rffc507x {
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namespace spi {
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using reg_t = uint16_t;
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using address_t = uint8_t;
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using bit_t = uint_fast8_t;
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using data_t = uint32_t;
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class SPI {
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public:
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enum class Direction {
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Write = 0,
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Read = 1,
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};
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void init();
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reg_t read(const address_t address) {
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return transfer_word(Direction::Read, address, 0);
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}
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void write(const address_t address, const reg_t value) {
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transfer_word(Direction::Write, address, value);
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}
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private:
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void select(const bool active);
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void direction_out();
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void direction_in();
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void write_bit(const bit_t value);
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bit_t read_bit();
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bit_t transfer_bit(const bit_t bit_out);
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data_t transfer_bits(const data_t data_out, const size_t count);
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data_t transfer_word(const Direction direction, const address_t address, const data_t data_out);
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};
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} /* spi */
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} /* rffc507x */
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#endif/*__RFFC507X_SPI_H__*/
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