mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-15 04:28:10 +00:00
78 lines
1.6 KiB
C++
78 lines
1.6 KiB
C++
/*
|
|
* Copyright (C) 2014 Jared Boone, ShareBrained Technology, Inc.
|
|
*
|
|
* This file is part of PortaPack.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2, or (at your option)
|
|
* any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; see the file COPYING. If not, write to
|
|
* the Free Software Foundation, Inc., 51 Franklin Street,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
#ifndef __SPI_ARBITER_H__
|
|
#define __SPI_ARBITER_H__
|
|
|
|
#include <cstddef>
|
|
|
|
#include "spi_pp.hpp"
|
|
|
|
namespace spi {
|
|
namespace arbiter {
|
|
|
|
class Arbiter {
|
|
public:
|
|
constexpr Arbiter(
|
|
SPI& bus
|
|
) : _bus(bus),
|
|
_config(nullptr)
|
|
{
|
|
}
|
|
|
|
void transfer(const SPIConfig* const config, void* const data, const size_t count) {
|
|
if( config != _config ) {
|
|
_bus.stop();
|
|
_bus.start(*config);
|
|
_config = config;
|
|
}
|
|
_bus.transfer(data, count);
|
|
}
|
|
|
|
private:
|
|
SPI& _bus;
|
|
const SPIConfig* _config;
|
|
};
|
|
|
|
class Target {
|
|
public:
|
|
constexpr Target(
|
|
Arbiter& arbiter,
|
|
const SPIConfig& config
|
|
) : _arbiter(arbiter),
|
|
_config(config)
|
|
{
|
|
}
|
|
|
|
void transfer(void* const data, const size_t count) {
|
|
_arbiter.transfer(&_config, data, count);
|
|
}
|
|
|
|
private:
|
|
Arbiter& _arbiter;
|
|
const SPIConfig _config;
|
|
};
|
|
|
|
} /* arbiter */
|
|
} /* spi */
|
|
|
|
#endif/*__SPI_ARBITER_H__*/
|