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ed7d6c74f4
Introduces the notion of a transaction that consists of one or more messages. Whereby a message has a read or write direction and consists of one or more bytes. Issue #4170 Fixes #4169
60 lines
1.3 KiB
C++
60 lines
1.3 KiB
C++
/*
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* \brief I2C session connection
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* \author Jean-Adrien Domage <jean-adrien.domage@gapfruit.com>
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* \date 2021-02-26
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*/
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/*
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* Copyright (C) 2013-2021 Genode Labs GmbH
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* Copyright (C) 2021 gapfruit AG
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _INCLUDE__I2C_SESSION__CONNECTION_H_
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#define _INCLUDE__I2C_SESSION__CONNECTION_H_
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#include <i2c_session/client.h>
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#include <base/connection.h>
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namespace I2c { struct Connection; }
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struct I2c::Connection : Genode::Connection<I2c::Session>, I2c::Session_client
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{
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Connection(Genode::Env &env, char const *label = "")
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:
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Genode::Connection<Session>(env, session(env.parent(), "ram_quota=8K, label=%s", label)),
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Session_client(cap())
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{ }
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void write_8bits(uint8_t byte)
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{
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Transaction t { Message(Message::WRITE, byte) };
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transmit(t);
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}
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uint8_t read_8bits()
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{
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Transaction t { Message(Message::READ, 0) };
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transmit(t);
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return t.value(0).value(0);
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}
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void write_16bits(uint16_t word)
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{
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Transaction t { Message(Message::WRITE, word & 0xff, word >> 8) };
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transmit(t);
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}
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uint16_t read_16bits()
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{
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Transaction t { Message(Message::READ, 0, 0) };
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transmit(t);
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return t.value(0).value(0) | (t.value(0).value(1) << 8);
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}
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};
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#endif /* _INCLUDE__I2C_SESSION__CONNECTION_H_ */
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