| /* |
| * Copyright (c) 2017, The OpenThread Authors. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the copyright holder nor the |
| * names of its contributors may be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE |
| * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| * POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| /** |
| * @file |
| * This file implements the OpenThread platform abstraction for UART communication. |
| * |
| */ |
| |
| #include <stddef.h> |
| |
| #include "openthread/types.h" |
| #include <utils/code_utils.h> |
| #include "openthread/platform/uart.h" |
| #include "platform-emsk.h" |
| |
| #include <stdio.h> |
| #define DBG(fmt, ...) printf(fmt, ##__VA_ARGS__) |
| |
| enum |
| { |
| kUartId = BOARD_CONSOLE_UART_ID, |
| kBaudRate = BOARD_CONSOLE_UART_BAUD, |
| kReceiveBufferSize = 128, |
| }; |
| |
| static void processReceive(void); |
| static void processTransmit(void); |
| |
| static const uint8_t *sTransmitBuffer = NULL; |
| static uint16_t sTransmitLength = 0; |
| |
| static uint8_t sReceiveBuffer[kReceiveBufferSize]; |
| static uint16_t sReceiveHead = 0; |
| |
| static DEV_UART *consoleUart; |
| |
| otError otPlatUartEnable(void) |
| { |
| int32_t stateUart = 0; |
| otError error = OT_ERROR_DROP; |
| |
| /* UART in embARC */ |
| consoleUart = uart_get_dev(BOARD_CONSOLE_UART_ID); |
| |
| otEXPECT_ACTION(!(consoleUart == NULL), DBG("Console UART is missing.\r\n")); |
| |
| stateUart = consoleUart->uart_open(BOARD_CONSOLE_UART_BAUD); |
| |
| if (stateUart == E_OPNED) |
| { |
| consoleUart->uart_control(UART_CMD_SET_BAUD, (void *)(BOARD_CONSOLE_UART_BAUD)); |
| error = OT_ERROR_NONE; |
| DBG("Set Console UART Baudrate to %d.\r\n", BOARD_CONSOLE_UART_BAUD); |
| } |
| else if (stateUart == E_OK) |
| { |
| error = OT_ERROR_NONE; |
| DBG("Open Console UART Successfully.\r\n"); |
| } |
| else |
| { |
| DBG("Open Console UART Error.\r\n"); |
| } |
| |
| exit: |
| |
| return error; |
| |
| } |
| |
| otError otPlatUartDisable(void) |
| { |
| return OT_ERROR_NONE; |
| } |
| |
| otError otPlatUartSend(const uint8_t *aBuf, uint16_t aBufLength) |
| { |
| otError error = OT_ERROR_NONE; |
| |
| otEXPECT_ACTION(sTransmitBuffer == NULL, error = OT_ERROR_BUSY); |
| |
| sTransmitBuffer = aBuf; |
| sTransmitLength = aBufLength; |
| |
| exit: |
| return error; |
| } |
| |
| void processReceive(void) |
| { |
| |
| int32_t rdAvail = 0; |
| uint16_t remaining; |
| |
| consoleUart->uart_control(UART_CMD_GET_RXAVAIL, (void *)(&rdAvail)); |
| otEXPECT_ACTION(rdAvail > 0, ;); |
| |
| remaining = kReceiveBufferSize - sReceiveHead; |
| |
| if (rdAvail >= remaining) |
| { |
| consoleUart->uart_read((void *)(sReceiveBuffer + sReceiveHead), (uint32_t)remaining); |
| otPlatUartReceived(sReceiveBuffer + sReceiveHead, remaining); |
| sReceiveHead = 0; |
| rdAvail -= (int32_t)remaining; |
| } |
| |
| while (rdAvail >= kReceiveBufferSize) |
| { |
| consoleUart->uart_read((void *)(sReceiveBuffer + sReceiveHead), (uint32_t)kReceiveBufferSize); |
| otPlatUartReceived(sReceiveBuffer + sReceiveHead, kReceiveBufferSize); |
| rdAvail -= kReceiveBufferSize; |
| } |
| |
| if (rdAvail > 0) |
| { |
| consoleUart->uart_read((void *)(sReceiveBuffer + sReceiveHead), (uint32_t)rdAvail); |
| otPlatUartReceived(sReceiveBuffer + sReceiveHead, rdAvail); |
| sReceiveHead += (uint16_t)rdAvail; |
| } |
| |
| exit: |
| return; |
| } |
| |
| void processTransmit(void) |
| { |
| otEXPECT_ACTION(sTransmitBuffer != NULL, ;); |
| |
| consoleUart->uart_write((void *)sTransmitBuffer, (int32_t)sTransmitLength); |
| |
| sTransmitBuffer = NULL; |
| otPlatUartSendDone(); |
| |
| exit: |
| return; |
| } |
| |
| void emskUartProcess(void) |
| { |
| processReceive(); |
| processTransmit(); |
| } |
| |