Device interface library for multiple platforms including Mbed.

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Show/hide line numbers DS9400.cpp Source File

DS9400.cpp

00001 /*******************************************************************************
00002 * Copyright (C) Maxim Integrated Products, Inc., All Rights Reserved.
00003 *
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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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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
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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
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00031 *******************************************************************************/
00032 
00033 #include "DS9400.hpp"
00034 
00035 #define TRY MaximInterfaceCore_TRY
00036 #define TRY_VALUE MaximInterfaceCore_TRY_VALUE
00037 
00038 namespace MaximInterfaceDevices {
00039 
00040 using namespace Core;
00041 
00042 Result<void> DS9400::waitAwake() {
00043   uint_least8_t data;
00044   do {
00045     TRY_VALUE(data, uart->readByte());
00046   } while (data != 0xA5);
00047   return none;
00048 }
00049 
00050 Result<void> DS9400::start() { return uart->writeByte('S'); }
00051 
00052 Result<void> DS9400::start(uint_least8_t address) {
00053   TRY(start());
00054   TRY(writeByte(address));
00055   return none;
00056 }
00057 
00058 Result<void> DS9400::stop() { return uart->writeByte('P'); }
00059 
00060 Result<void> DS9400::writeByte(uint_least8_t data) {
00061   const uint_least8_t packet[] = {'Q', data};
00062   TRY(uart->clearReadBuffer());
00063   TRY(uart->writeBlock(packet));
00064   TRY_VALUE(data, uart->readByte());
00065   return (data == 0) ? makeResult(none) : I2CMaster::NackError;
00066 }
00067 
00068 Result<uint_least8_t> DS9400::readByte(DoAck doAck) {
00069   TRY(uart->clearReadBuffer());
00070   TRY(uart->writeByte(doAck == Ack ? 'R' : 'N'));
00071   return uart->readByte();
00072 }
00073 
00074 Result<void> DS9400::configure(uint_least8_t config) {
00075   const uint_least8_t packet[] = {'C', config};
00076   return uart->writeBlock(packet);
00077 }
00078 
00079 } // namespace MaximInterfaceDevices