mirror of
https://github.com/portapack-mayhem/mayhem-firmware.git
synced 2024-12-13 19:54:39 +00:00
033c4e9a5b
* Updated style * Updated files * fixed new line * Updated spacing * File fix WIP * Updated to clang 13 * updated comment style * Removed old comment code
88 lines
2.2 KiB
C++
88 lines
2.2 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 __I2C_PP_H__
|
|
#define __I2C_PP_H__
|
|
|
|
#include <cstdint>
|
|
|
|
#include "ch.h"
|
|
#include "hal.h"
|
|
|
|
struct I2CClockConfig {
|
|
float clock_source_f;
|
|
float bus_f;
|
|
float high_period_ns;
|
|
|
|
static constexpr float period_ns(const float f) {
|
|
return 1e9 / f;
|
|
}
|
|
|
|
constexpr uint32_t i2c_period_count() const {
|
|
return period_ns(bus_f) / period_ns(clock_source_f) + 0.5f;
|
|
}
|
|
|
|
constexpr uint32_t i2c_high_count() const {
|
|
return high_period_ns / period_ns(clock_source_f) + 0.5f;
|
|
}
|
|
|
|
constexpr uint32_t i2c_low_count() const {
|
|
return i2c_period_count() - i2c_high_count();
|
|
}
|
|
};
|
|
|
|
class I2C {
|
|
public:
|
|
using address_t = uint8_t;
|
|
|
|
constexpr I2C(I2CDriver* const driver)
|
|
: _driver(driver) {
|
|
}
|
|
|
|
void start(const I2CConfig& config);
|
|
void stop();
|
|
|
|
bool receive(
|
|
const address_t slave_address,
|
|
uint8_t* const data,
|
|
const size_t count,
|
|
const systime_t timeout = TIME_INFINITE);
|
|
|
|
bool transmit(
|
|
const address_t slave_address,
|
|
const uint8_t* const data,
|
|
const size_t count,
|
|
const systime_t timeout = TIME_INFINITE);
|
|
|
|
private:
|
|
I2CDriver* const _driver;
|
|
|
|
bool transfer(
|
|
const address_t slave_address,
|
|
const uint8_t* const data_tx,
|
|
const size_t count_tx,
|
|
uint8_t* const data_rx,
|
|
const size_t count_rx,
|
|
const systime_t timeout);
|
|
};
|
|
|
|
#endif /*__I2C_PP_H__*/
|