Device interface library for multiple platforms including Mbed.

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Show/hide line numbers I2CMaster.cpp Source File

I2CMaster.cpp

00001 /*******************************************************************************
00002 * Copyright (C) Maxim Integrated Products, Inc., All Rights Reserved.
00003 *
00004 * Permission is hereby granted, free of charge, to any person obtaining a
00005 * copy of this software and associated documentation files (the "Software"),
00006 * to deal in the Software without restriction, including without limitation
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00008 * and/or sell copies of the Software, and to permit persons to whom the
00009 * Software is furnished to do so, subject to the following conditions:
00010 *
00011 * The above copyright notice and this permission notice shall be included
00012 * in all copies or substantial portions of the Software.
00013 *
00014 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
00015 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00016 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
00017 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
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00019 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
00020 * OTHER DEALINGS IN THE SOFTWARE.
00021 *
00022 * Except as contained in this notice, the name of Maxim Integrated
00023 * Products, Inc. shall not be used except as stated in the Maxim Integrated
00024 * Products, Inc. Branding Policy.
00025 *
00026 * The mere transfer of this software does not imply any licenses
00027 * of trade secrets, proprietary technology, copyrights, patents,
00028 * trademarks, maskwork rights, or any other form of intellectual
00029 * property whatsoever. Maxim Integrated Products, Inc. retains all
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00031 *******************************************************************************/
00032 
00033 #include "I2CMaster.hpp"
00034 
00035 namespace MaximInterfaceMbed {
00036 
00037 using namespace MaximInterfaceCore;
00038 
00039 Result<void> I2CMaster::start(uint_least8_t address) {
00040   i2c->start();
00041   return writeByte(address);
00042 }
00043 
00044 Result<void> I2CMaster::stop() {
00045   i2c->stop();
00046   return none;
00047 }
00048 
00049 Result<void> I2CMaster::writeByte(uint_least8_t data) {
00050   return (i2c->write(data) == 1) ? makeResult(none) : NackError;
00051 }
00052 
00053 Result<void> I2CMaster::writePacket(uint_least8_t address,
00054                                     span<const uint_least8_t> data,
00055                                     DoStop doStop) {
00056   const Result<void> result =
00057       (i2c->write(address, reinterpret_cast<const char *>(data.data()),
00058                   data.size(), doStop != Stop) == 0)
00059           ? makeResult(none)
00060           : NackError;
00061   if (doStop == StopOnError && !result) {
00062     i2c->stop();
00063   }
00064   return result;
00065 }
00066 
00067 Result<uint_least8_t> I2CMaster::readByte(DoAck doAck) {
00068   return i2c->read(doAck == Ack);
00069 }
00070 
00071 Result<void> I2CMaster::readPacket(uint_least8_t address,
00072                                    span<uint_least8_t> data, DoStop doStop) {
00073   const Result<void> result =
00074       (i2c->read(address, reinterpret_cast<char *>(data.data()), data.size(),
00075                  doStop != Stop) == 0)
00076           ? makeResult(none)
00077           : NackError;
00078   if (doStop == StopOnError && !result) {
00079     i2c->stop();
00080   }
00081   return result;
00082 }
00083 
00084 } // namespace MaximInterfaceMbed