219 lines
5.2 KiB
C++
219 lines
5.2 KiB
C++
/*
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* Copyright (c) 2016, The OpenThread Authors.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/**
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* @file
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* This file implements the CLI server on the UART service.
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*/
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#include <stdarg.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <cli/cli.hpp>
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#include <cli/cli-uart.h>
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#include <cli/cli_uart.hpp>
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#include <common/code_utils.hpp>
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#include <common/encoding.hpp>
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#include <common/new.hpp>
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#include <common/tasklet.hpp>
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#include <platform/uart.h>
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namespace Thread {
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namespace Cli {
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static const char sCommandPrompt[] = {'>', ' '};
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static const char sEraseString[] = {'\b', ' ', '\b'};
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static const char CRNL[] = {'\r', '\n'};
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Uart *Uart::sUartServer;
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static otDEFINE_ALIGNED_VAR(sCliUartRaw, sizeof(Uart), uint64_t);
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extern "C" void otCliUartInit(otInstance *aInstance)
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{
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Uart::sUartServer = new(&sCliUartRaw) Uart(aInstance);
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}
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Uart::Uart(otInstance *aInstance):
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mInterpreter(aInstance)
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{
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mRxLength = 0;
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mTxHead = 0;
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mTxLength = 0;
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mSendLength = 0;
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}
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extern "C" void otPlatUartReceived(const uint8_t *aBuf, uint16_t aBufLength)
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{
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Uart::sUartServer->ReceiveTask(aBuf, aBufLength);
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}
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void Uart::ReceiveTask(const uint8_t *aBuf, uint16_t aBufLength)
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{
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const uint8_t *end;
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end = aBuf + aBufLength;
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for (; aBuf < end; aBuf++)
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{
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switch (*aBuf)
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{
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case '\r':
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case '\n':
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Output(CRNL, sizeof(CRNL));
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if (mRxLength > 0)
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{
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mRxBuffer[mRxLength] = '\0';
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ProcessCommand();
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}
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Output(sCommandPrompt, sizeof(sCommandPrompt));
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break;
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#ifdef OPENTHREAD_EXAMPLES_POSIX
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case 0x03: // ASCII for Ctrl-C
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exit(EXIT_SUCCESS);
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break;
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#endif
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case '\b':
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case 127:
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if (mRxLength > 0)
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{
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Output(sEraseString, sizeof(sEraseString));
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mRxBuffer[--mRxLength] = '\0';
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}
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break;
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default:
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Output(reinterpret_cast<const char *>(aBuf), 1);
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mRxBuffer[mRxLength++] = static_cast<char>(*aBuf);
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break;
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}
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}
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}
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ThreadError Uart::ProcessCommand(void)
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{
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ThreadError error = kThreadError_None;
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if (mRxBuffer[mRxLength - 1] == '\n')
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{
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mRxBuffer[--mRxLength] = '\0';
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}
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if (mRxBuffer[mRxLength - 1] == '\r')
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{
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mRxBuffer[--mRxLength] = '\0';
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}
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mInterpreter.ProcessLine(mRxBuffer, mRxLength, *this);
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mRxLength = 0;
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return error;
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}
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int Uart::Output(const char *aBuf, uint16_t aBufLength)
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{
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uint16_t remaining = kTxBufferSize - mTxLength;
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uint16_t tail;
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if (aBufLength > remaining)
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{
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aBufLength = remaining;
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}
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for (int i = 0; i < aBufLength; i++)
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{
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tail = (mTxHead + mTxLength) % kTxBufferSize;
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mTxBuffer[tail] = *aBuf++;
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mTxLength++;
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}
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Send();
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return aBufLength;
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}
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int Uart::OutputFormat(const char *fmt, ...)
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{
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char buf[kMaxLineLength];
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va_list ap;
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va_start(ap, fmt);
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vsnprintf(buf, sizeof(buf), fmt, ap);
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va_end(ap);
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return Output(buf, static_cast<uint16_t>(strlen(buf)));
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}
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void Uart::Send(void)
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{
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VerifyOrExit(mSendLength == 0, ;);
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if (mTxLength > kTxBufferSize - mTxHead)
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{
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mSendLength = kTxBufferSize - mTxHead;
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}
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else
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{
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mSendLength = mTxLength;
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}
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if (mSendLength > 0)
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{
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otPlatUartSend(reinterpret_cast<uint8_t *>(mTxBuffer + mTxHead), mSendLength);
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}
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exit:
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return;
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}
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extern "C" void otPlatUartSendDone(void)
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{
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Uart::sUartServer->SendDoneTask();
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}
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void Uart::SendDoneTask(void)
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{
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mTxHead = (mTxHead + mSendLength) % kTxBufferSize;
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mTxLength -= mSendLength;
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mSendLength = 0;
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Send();
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}
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} // namespace Cli
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} // namespace Thread
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