Device interface library for multiple platforms including Mbed.
Dependents: DeepCover Embedded Security in IoT MaximInterface MAXREFDES155#
Maxim Interface is a library framework focused on providing flexible and expressive hardware interfaces. Both communication interfaces such as I2C and 1-Wire and device interfaces such as DS18B20 are supported. Modern C++ concepts are used extensively while keeping compatibility with C++98/C++03 and requiring no external dependencies. The embedded-friendly design does not depend on exceptions or RTTI.
The full version of the project is hosted on GitLab: https://gitlab.com/iabenz/MaximInterface
Diff: MaximInterfaceCore/RunCommand.cpp
- Revision:
- 7:9cd16581b578
- Child:
- 8:5ea891c7d1a1
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MaximInterfaceCore/RunCommand.cpp Mon Jul 22 11:44:07 2019 -0500 @@ -0,0 +1,210 @@ +/******************************************************************************* +* Copyright (C) 2018 Maxim Integrated Products, Inc., All Rights Reserved. +* +* Permission is hereby granted, free of charge, to any person obtaining a +* copy of this software and associated documentation files (the "Software"), +* to deal in the Software without restriction, including without limitation +* the rights to use, copy, modify, merge, publish, distribute, sublicense, +* and/or sell copies of the Software, and to permit persons to whom the +* Software is furnished to do so, subject to the following conditions: +* +* The above copyright notice and this permission notice shall be included +* in all copies or substantial portions of the Software. +* +* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS +* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES +* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, +* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR +* OTHER DEALINGS IN THE SOFTWARE. +* +* Except as contained in this notice, the name of Maxim Integrated +* Products, Inc. shall not be used except as stated in the Maxim Integrated +* Products, Inc. Branding Policy. +* +* The mere transfer of this software does not imply any licenses +* of trade secrets, proprietary technology, copyrights, patents, +* trademarks, maskwork rights, or any other form of intellectual +* property whatsoever. Maxim Integrated Products, Inc. retains all +* ownership rights. +*******************************************************************************/ + +#include "crc.hpp" +#include "Error.hpp" +#include "I2CMaster.hpp" +#include "OneWireMaster.hpp" +#include "RunCommand.hpp" +#include "Sleep.hpp" + +namespace MaximInterfaceCore { + +const error_category & RunCommandWithOneWireMaster::errorCategory() { + static class : public error_category { + public: + virtual const char * name() const { return "RunCommandWithOneWireMaster"; } + + virtual std::string message(int condition) const { + switch (condition) { + case CrcError: + return "CRC Error"; + + case InvalidResponseError: + return "Invalid Response Error"; + } + return defaultErrorMessage(condition); + } + } instance; + return instance; +} + +error_code RunCommandWithOneWireMaster:: +operator()(span<const uint_least8_t> request, int delayTime, + span<uint_least8_t> & response) const { + // Write request. + error_code result = selectRom(*master); + if (result) { + return result; + } + uint_least8_t xpcBuffer[2] = {0x66, + static_cast<uint_least8_t>(request.size())}; + result = master->writeBlock(xpcBuffer); + if (result) { + return result; + } + result = master->writeBlock(request); + if (result) { + return result; + } + uint_fast16_t expectedCrc = + calculateCrc16(calculateCrc16(xpcBuffer), request) ^ 0xFFFFu; + result = master->readBlock(xpcBuffer); + if (result) { + return result; + } + if (expectedCrc != + ((static_cast<uint_fast16_t>(xpcBuffer[1]) << 8) | xpcBuffer[0])) { + return make_error_code(CrcError); + } + result = master->writeBytePower(0xAA); + if (result) { + return result; + } + + // Wait for device to process. + sleep->invoke(delayTime); + + // Read response. + result = master->setLevel(OneWireMaster::NormalLevel); + if (result) { + return result; + } + result = master->readBlock(xpcBuffer); + if (result) { + return result; + } + if (xpcBuffer[1] > response.size()) { + return make_error_code(InvalidResponseError); + } + response = response.first(xpcBuffer[1]); + result = master->readBlock(response); + if (result) { + return result; + } + expectedCrc = + calculateCrc16(calculateCrc16(make_span(xpcBuffer + 1, 1)), response) ^ + 0xFFFFu; + result = master->readBlock(xpcBuffer); + if (result) { + return result; + } + if (expectedCrc != + ((static_cast<uint_fast16_t>(xpcBuffer[1]) << 8) | xpcBuffer[0])) { + return make_error_code(CrcError); + } + return result; +} + +const error_category & RunCommandWithI2CMaster::errorCategory() { + static class : public error_category { + public: + virtual const char * name() const { return "RunCommandWithI2CMaster"; } + + virtual std::string message(int condition) const { + switch (condition) { + case InvalidResponseError: + return "Invalid Response Error"; + } + return defaultErrorMessage(condition); + } + } instance; + return instance; +} + +error_code RunCommandWithI2CMaster:: +operator()(span<const uint_least8_t> request, int delayTime, + span<uint_least8_t> & response) const { + // Write request. + error_code result = master->start(address_); + if (result == make_error_condition(I2CMaster::NackError) && address_ != 0) { + result = master->start(0); + } + if (result) { + master->stop(); + return result; + } + if (!request.empty()) { + result = master->writeByte(request[0]); + if (result) { + master->stop(); + return result; + } + request = request.subspan(1); + if (!request.empty()) { + result = master->writeByte(static_cast<uint_least8_t>(request.size())); + if (result) { + master->stop(); + return result; + } + result = master->writeBlock(request); + if (result) { + master->stop(); + return result; + } + } + } + result = master->stop(); + if (result) { + return result; + } + + // Wait for device to process. + sleep->invoke(delayTime); + + // Read response. + result = master->start(address_ | 1); + if (result) { + master->stop(); + return result; + } + uint_least8_t length; + result = master->readByte(I2CMaster::Ack, length); + if (result) { + master->stop(); + return result; + } + if (length > response.size()) { + master->stop(); + return make_error_code(InvalidResponseError); + } + response = response.first(length); + result = master->readBlock(I2CMaster::Nack, response); + if (result) { + master->stop(); + return result; + } + result = master->stop(); + return result; +} + +} // namespace MaximInterfaceCore