mirror of
https://github.com/Atmosphere-NX/Atmosphere
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56 lines
2.4 KiB
C++
56 lines
2.4 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* 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. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <vapours.hpp>
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#include <stratosphere/i2c/i2c_types.hpp>
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#include <stratosphere/i2c/i2c_command_list_formatter.hpp>
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#include <stratosphere/i2c/i2c_bus_api.hpp>
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namespace ams::i2c {
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template<typename RegType> requires std::unsigned_integral<RegType>
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Result ReadSingleRegister(const I2cSession &session, u8 address, RegType *out) {
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/* Check pre-conditions. */
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AMS_ABORT_UNLESS(out != nullptr);
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constexpr i2c::TransactionOption StartOption = i2c::TransactionOption_StartCondition;
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constexpr i2c::TransactionOption StopOption = static_cast<i2c::TransactionOption>(i2c::TransactionOption_StartCondition | i2c::TransactionOption_StopCondition);
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u8 cmd_list[CommandListLengthMax];
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i2c::CommandListFormatter formatter(cmd_list, sizeof(cmd_list));
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R_TRY(formatter.EnqueueSendCommand(StartOption, std::addressof(address), sizeof(address)));
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R_TRY(formatter.EnqueueReceiveCommand(StopOption, sizeof(*out)));
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R_TRY(i2c::ExecuteCommandList(out, sizeof(*out), session, cmd_list, formatter.GetCurrentLength()));
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return ResultSuccess();
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}
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template<typename RegType> requires std::unsigned_integral<RegType>
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Result WriteSingleRegister(const I2cSession &session, u8 address, RegType value) {
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/* Prepare buffer. */
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u8 buf[sizeof(address) + sizeof(value)];
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std::memcpy(buf + 0, std::addressof(address), sizeof(address));
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std::memcpy(buf + sizeof(address), std::addressof(value), sizeof(value));
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constexpr i2c::TransactionOption StopOption = static_cast<i2c::TransactionOption>(i2c::TransactionOption_StartCondition | i2c::TransactionOption_StopCondition);
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R_TRY(i2c::Send(session, buf, sizeof(buf), StopOption));
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return ResultSuccess();
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}
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}
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