portapack-mayhem/firmware/common/buffer.hpp
2016-01-31 09:34:24 +01:00

102 lines
2.4 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 __BUFFER_H__
#define __BUFFER_H__
#include <cstdint>
#include <cstddef>
/* LPC43xx RTC structure. Avoiding using the ChibiOS-defined structure because
* it pulls in all sorts of dependencies and initialization and other stuff that
* the M0 needs to remain in control of.
*
* But yes, this is a hack, and something better is needed. It's too tangled of
* a knot to tackle at the moment, though...
*/
#if defined(LPC43XX_M4)
#include "lpc43xx_m4.h"
struct Timestamp {
uint32_t tv_date { 0 };
uint32_t tv_time { 0 };
static Timestamp now() {
// Code stolen from LPC43xx rtc_lld.c
Timestamp timestamp;
do {
timestamp.tv_time = LPC_RTC->CTIME0;
timestamp.tv_date = LPC_RTC->CTIME1;
} while( (timestamp.tv_time != LPC_RTC->CTIME0) || (timestamp.tv_date != LPC_RTC->CTIME1) );
return timestamp;
}
};
#endif
#if defined(LPC43XX_M0)
#include "lpc43xx_cpp.hpp"
using Timestamp = lpc43xx::rtc::RTC;
#endif
template<typename T>
struct buffer_t {
T* const p;
const size_t count;
const uint32_t sampling_rate;
const Timestamp timestamp;
constexpr buffer_t(
) : p { nullptr },
count { 0 },
sampling_rate { 0 },
timestamp { }
{
}
constexpr buffer_t(
const buffer_t<T>& other
) : p { other.p },
count { other.count },
sampling_rate { other.sampling_rate },
timestamp { other.timestamp }
{
}
constexpr buffer_t(
T* const p,
const size_t count,
const uint32_t sampling_rate = 0,
const Timestamp timestamp = { }
) : p { p },
count { count },
sampling_rate { sampling_rate },
timestamp { timestamp }
{
}
operator bool() const {
return (p != nullptr);
}
};
#endif/*__BUFFER_H__*/