| /* |
| * Copyright (c) 2023, 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 RTT implementation of the uart API. |
| * |
| */ |
| |
| #include <stdint.h> |
| |
| #include <openthread-core-config.h> |
| #include <openthread/config.h> |
| |
| #include <utils/code_utils.h> |
| #include <openthread/error.h> |
| |
| #if OPENTHREAD_UART_RTT_ENABLE |
| |
| #include "SEGGER_RTT.h" |
| #include "uart.h" |
| #include "uart_rtt.h" |
| |
| static bool sUartInitialized = false; |
| static bool sUartPendingUp = false; |
| |
| #if UART_RTT_BUFFER_INDEX != 0 |
| static uint8_t sUartUpBuffer[UART_RTT_UP_BUFFER_SIZE]; |
| static uint8_t sUartDownBuffer[UART_RTT_DOWN_BUFFER_SIZE]; |
| #endif |
| |
| otError otPlatUartEnable(void) |
| { |
| otError error = OT_ERROR_FAILED; |
| |
| #if UART_RTT_BUFFER_INDEX != 0 |
| int resUp = SEGGER_RTT_ConfigUpBuffer(UART_RTT_BUFFER_INDEX, UART_RTT_BUFFER_NAME, sUartUpBuffer, |
| UART_RTT_UP_BUFFER_SIZE, SEGGER_RTT_MODE_BLOCK_IF_FIFO_FULL); |
| int resDown = SEGGER_RTT_ConfigDownBuffer(UART_RTT_BUFFER_INDEX, UART_RTT_BUFFER_NAME, sUartDownBuffer, |
| UART_RTT_DOWN_BUFFER_SIZE, SEGGER_RTT_MODE_BLOCK_IF_FIFO_FULL); |
| #else |
| int resUp = SEGGER_RTT_SetFlagsUpBuffer(UART_RTT_BUFFER_INDEX, SEGGER_RTT_MODE_BLOCK_IF_FIFO_FULL); |
| int resDown = SEGGER_RTT_SetFlagsDownBuffer(UART_RTT_BUFFER_INDEX, SEGGER_RTT_MODE_BLOCK_IF_FIFO_FULL); |
| #endif |
| |
| otEXPECT(resUp >= 0 && resDown >= 0); |
| |
| sUartInitialized = true; |
| sUartPendingUp = false; |
| error = OT_ERROR_NONE; |
| |
| exit: |
| return error; |
| } |
| |
| otError otPlatUartDisable(void) |
| { |
| sUartInitialized = false; |
| |
| return OT_ERROR_NONE; |
| } |
| |
| otError otPlatUartSend(const uint8_t *aBuf, uint16_t aBufLength) |
| { |
| otError error = OT_ERROR_NONE; |
| |
| otEXPECT_ACTION(SEGGER_RTT_Write(UART_RTT_BUFFER_INDEX, aBuf, aBufLength) != 0, error = OT_ERROR_FAILED); |
| sUartPendingUp = true; |
| |
| exit: |
| return error; |
| } |
| |
| otError otPlatUartFlush(void) |
| { |
| otError error = OT_ERROR_NONE; |
| |
| otEXPECT_ACTION(sUartPendingUp, error = OT_ERROR_INVALID_STATE); |
| |
| while (SEGGER_RTT_HasDataUp(UART_RTT_BUFFER_INDEX) != 0) |
| { |
| } |
| |
| exit: |
| return error; |
| } |
| |
| void utilsUartRttProcess(void) |
| { |
| uint8_t buf[UART_RTT_READ_BUFFER_SIZE]; |
| unsigned count; |
| |
| otEXPECT(sUartInitialized); |
| |
| if (sUartPendingUp && SEGGER_RTT_HasDataUp(UART_RTT_BUFFER_INDEX) == 0) |
| { |
| sUartPendingUp = false; |
| otPlatUartSendDone(); |
| } |
| |
| count = SEGGER_RTT_Read(UART_RTT_BUFFER_INDEX, &buf, sizeof(buf)); |
| if (count > 0) |
| { |
| otPlatUartReceived((const uint8_t *)&buf, count); |
| } |
| |
| exit: |
| return; |
| } |
| |
| #endif // OPENTHREAD_UART_RTT_ENABLE |