kopia lustrzana https://github.com/mobilinkd/tnc3-firmware
431 wiersze
12 KiB
C++
431 wiersze
12 KiB
C++
// Copyright 2016 Rob Riggs <rob@mobilinkd.com>
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// All rights reserved.
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#include "Log.h"
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#include "SerialPort.hpp"
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#include "PortInterface.h"
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#include "HdlcFrame.hpp"
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#include "bm78.h"
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#include "Kiss.hpp"
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#include "main.h"
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#include "stm32l4xx_hal.h"
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#include "cmsis_os.h"
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#include <cstdlib>
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#include <cstring>
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#include <atomic>
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extern UART_HandleTypeDef huart3;
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extern osMessageQId ioEventQueueHandle;
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uint8_t rxBuffer;
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std::atomic<int> uart_error{HAL_UART_ERROR_NONE};
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std::atomic<bool> txDoneFlag{true};
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uint8_t tmpBuffer[mobilinkd::tnc::TX_BUFFER_SIZE];
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uint8_t tmpBuffer2[mobilinkd::tnc::TX_BUFFER_SIZE];
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void log_frame(mobilinkd::tnc::hdlc::IoFrame* frame)
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{
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int pos = 0;
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for (auto c: *frame) {
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if (isprint(int(c))) pos += sprintf((char*)tmpBuffer2 + pos, " %c ", c);
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else pos += sprintf((char*)tmpBuffer2 + pos, "/%02x", c);
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if (pos > 80) {
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DEBUG((char*)tmpBuffer2);
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pos = 0;
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}
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}
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DEBUG((char*)tmpBuffer2);
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}
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extern "C" void startSerialTask(void const* arg)
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{
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using namespace mobilinkd::tnc;
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auto serialPort = static_cast<const SerialPort*>(arg);
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const uint8_t FEND = 0xC0;
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const uint8_t FESC = 0xDB;
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const uint8_t TFEND = 0xDC;
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const uint8_t TFESC = 0xDD;
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enum State {WAIT_FBEGIN, WAIT_FRAME_TYPE, WAIT_FEND, WAIT_ESCAPED};
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State state = WAIT_FBEGIN;
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hdlc::IoFrame* frame = hdlc::acquire_wait();
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HAL_UART_Receive_IT(&huart3, &rxBuffer, 1);
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while (true) {
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osEvent evt = osMessageGet(serialPort->queue(), osWaitForever);
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if (evt.status != osEventMessage) {
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HAL_UART_Receive_IT(&huart3, &rxBuffer, 1);
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continue;
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}
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if (evt.value.v & 0x100) {
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hdlc::release(frame);
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ERROR("UART Error: %08lx", evt.value.v);
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uart_error.store(HAL_UART_ERROR_NONE);
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frame = hdlc::acquire_wait();
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HAL_UART_Receive_IT(&huart3, &rxBuffer, 1);
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continue;
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}
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uint8_t c = evt.value.v;
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switch (state) {
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case WAIT_FBEGIN:
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if (c == FEND) state = WAIT_FRAME_TYPE;
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break;
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case WAIT_FRAME_TYPE:
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if (c == FEND) break; // Still waiting for FRAME_TYPE.
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frame->type(c);
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state = WAIT_FEND;
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break;
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case WAIT_FEND:
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switch (c) {
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case FESC:
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state = WAIT_ESCAPED;
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break;
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case FEND:
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frame->source(hdlc::IoFrame::SERIAL_DATA);
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if (osMessagePut(ioEventQueueHandle, reinterpret_cast<uint32_t>(frame), osWaitForever) != osOK)
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{
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hdlc::release(frame);
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}
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osDelay(50);
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frame = hdlc::acquire_wait();
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state = WAIT_FBEGIN;
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break;
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default:
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if (not frame->push_back(c)) {
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hdlc::release(frame);
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state = WAIT_FBEGIN; // Drop frame;
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frame = hdlc::acquire();
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}
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}
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break;
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case WAIT_ESCAPED:
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state = WAIT_FEND;
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switch (c) {
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case TFESC:
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if (not frame->push_back(FESC)) {
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hdlc::release(frame);
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state = WAIT_FBEGIN; // Drop frame;
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frame = hdlc::acquire_wait();
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}
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break;
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case TFEND:
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if (not frame->push_back(FEND)) {
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hdlc::release(frame);
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state = WAIT_FBEGIN; // Drop frame;
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frame = hdlc::acquire();
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}
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break;
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default:
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hdlc::release(frame);
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state = WAIT_FBEGIN; // Drop frame;
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frame = hdlc::acquire_wait();
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}
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break;
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}
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}
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}
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extern "C" void HAL_UART_TxCpltCallback(UART_HandleTypeDef*)
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{
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txDoneFlag = true;
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}
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extern "C" void HAL_UART_RxCpltCallback(UART_HandleTypeDef *)
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{
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osMessagePut(mobilinkd::tnc::getSerialPort()->queue(), (uint32_t) rxBuffer, 0);
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HAL_UART_Receive_IT(&huart3, &rxBuffer, 1);
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}
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extern "C" void HAL_UART_ErrorCallback(UART_HandleTypeDef* huart)
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{
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osMessagePut(mobilinkd::tnc::getSerialPort()->queue(),
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(uint32_t) (huart->gState<<16) | huart->ErrorCode | 0x100, 0);
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uart_error.store((huart->gState<<16) | huart->ErrorCode);
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huart->ErrorCode = HAL_UART_ERROR_NONE;
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huart->gState = HAL_UART_STATE_READY;
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}
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namespace mobilinkd { namespace tnc {
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void SerialPort::init()
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{
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if (serialTaskHandle_) return;
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osMessageQDef(uartQueue, 32, void*);
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queue_ = osMessageCreate(osMessageQ(uartQueue), 0);
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osMutexDef(uartMutex);
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mutex_ = osMutexCreate(osMutex(uartMutex));
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osThreadDef(serialTask, startSerialTask, osPriorityAboveNormal, 0, 128);
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serialTaskHandle_ = osThreadCreate(osThread(serialTask), this);
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DEBUG("serialTaskHandle_ = %p", serialTaskHandle_);
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}
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bool SerialPort::open()
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{
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if (open_ or !serialTaskHandle_) return open_;
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open_ = true;
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return open_;
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}
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void SerialPort::close()
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{
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open_ = false;
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}
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bool SerialPort::write(const uint8_t* data, uint32_t size, uint8_t type, uint32_t timeout)
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{
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if (!open_) return false;
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uint32_t start = osKernelSysTick();
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if (osMutexWait(mutex_, timeout) != osOK)
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return false;
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using ::mobilinkd::tnc::kiss::slip_encoder;
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auto slip_iter = slip_encoder((const char*)data, size);
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auto slip_end = slip_encoder();
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size_t pos = 0;
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memset(tmpBuffer, 0, TX_BUFFER_SIZE);
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tmpBuffer[pos++] = 0xC0; // FEND
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tmpBuffer[pos++] = type; // KISS Data Frame
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while (slip_iter != slip_end) {
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tmpBuffer[pos++] = *slip_iter++;
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if (pos == TX_BUFFER_SIZE) {
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while (!txDoneFlag) osThreadYield();
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memcpy(TxBuffer, tmpBuffer, TX_BUFFER_SIZE);
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txDoneFlag = false;
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while (open_ and HAL_UART_Transmit_DMA(&huart3, TxBuffer, TX_BUFFER_SIZE) == HAL_BUSY)
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{
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if (osKernelSysTick() > start + timeout) {
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osMutexRelease(mutex_);
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txDoneFlag = true;
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return false;
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}
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osThreadYield();
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}
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pos = 0;
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memset(TxBuffer, 0, TX_BUFFER_SIZE);
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}
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}
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// Buffer has room for at least one more byte.
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tmpBuffer[pos++] = 0xC0;
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while (!txDoneFlag) osThreadYield();
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memcpy(TxBuffer, tmpBuffer, pos);
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txDoneFlag = false;
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while (open_ and HAL_UART_Transmit_DMA(&huart3, TxBuffer, pos) == HAL_BUSY)
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{
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if (osKernelSysTick() > start + timeout) {
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osMutexRelease(mutex_);
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txDoneFlag = true;
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return false;
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}
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osThreadYield();
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}
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osMutexRelease(mutex_);
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return true;
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}
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bool SerialPort::write(const uint8_t* data, uint32_t size, uint32_t timeout)
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{
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if (!open_) return false;
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uint32_t start = osKernelSysTick();
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if (osMutexWait(mutex_, timeout) != osOK)
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return false;
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size_t pos = 0;
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memset(TxBuffer, 0, TX_BUFFER_SIZE);
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auto first = data;
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auto last = data + size;
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while (first != last) {
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TxBuffer[pos++] = *first++;
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if (pos == TX_BUFFER_SIZE) {
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while (open_ and HAL_UART_Transmit(&huart3, TxBuffer, TX_BUFFER_SIZE, timeout) == HAL_BUSY)
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{
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if (osKernelSysTick() > start + timeout) {
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osMutexRelease(mutex_);
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return false;
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}
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osThreadYield();
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}
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pos = 0;
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memset(TxBuffer, 0, TX_BUFFER_SIZE);
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}
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}
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while (open_ and HAL_UART_Transmit(&huart3, TxBuffer, TX_BUFFER_SIZE, timeout) == HAL_BUSY)
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{
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if (osKernelSysTick() > start + timeout) {
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osMutexRelease(mutex_);
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return false;
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}
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osThreadYield();
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}
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while (open_ and HAL_UART_Transmit(&huart3, (uint8_t*)"\r\n", 2, timeout) == HAL_BUSY)
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{
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if (osKernelSysTick() > start + timeout) {
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osMutexRelease(mutex_);
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return false;
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}
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osThreadYield();
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}
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osMutexRelease(mutex_);
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return true;
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}
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/*
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* Abort the DMA transmission. Release the mutex and the frame. Set the
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* txDoneFlag so other writes may be attempted.
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*
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* This really sucks. The BM78 seems to just give up the ghost in BLE mode
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* when connected for long periods of time (and long is relative, but
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* typically more than an hour). To deal with this, we reset the device
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* and the client needs to attempt to reconnect when disconnection is
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* detected.
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*/
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bool SerialPort::abort_tx(hdlc::IoFrame* frame)
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{
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HAL_UART_AbortTransmit(&huart3);
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hdlc::release(frame);
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WARN("SerialPort::write timed out -- DMA aborted.");
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HAL_GPIO_WritePin(BT_RESET_GPIO_Port, BT_RESET_Pin, GPIO_PIN_RESET);
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osDelay(1);
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HAL_GPIO_WritePin(BT_RESET_GPIO_Port, BT_RESET_Pin, GPIO_PIN_SET);
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bm78_wait_until_ready();
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txDoneFlag = true;
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osMutexRelease(mutex_);
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return false;
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}
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bool SerialPort::write(hdlc::IoFrame* frame, uint32_t timeout)
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{
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DEBUG("SerialPort::write sending frame");
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if (!open_) {
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WARN("SerialPort::write not open");
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hdlc::release(frame);
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return false;
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}
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uint32_t start = osKernelSysTick();
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if (osMutexWait(mutex_, timeout) != osOK) {
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WARN("SerialPort::write timed out");
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hdlc::release(frame);
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return false;
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}
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using ::mobilinkd::tnc::kiss::slip_encoder2;
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hdlc::IoFrame::iterator begin = frame->begin();
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hdlc::IoFrame::iterator end = frame->begin();
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std::advance(end, frame->size() - 2); // Drop FCS
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auto slip_iter = slip_encoder2(begin);
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auto slip_end = slip_encoder2(end);
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size_t pos = 0;
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tmpBuffer[pos++] = 0xC0; // FEND
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tmpBuffer[pos++] = static_cast<int>(frame->type()); // KISS Data Frame
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while (slip_iter != slip_end)
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{
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tmpBuffer[pos++] = *slip_iter++;
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if (pos == TX_BUFFER_SIZE) {
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while (!txDoneFlag) {
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// txDoneFlag set in HAL_UART_TxCpltCallback() above when DMA completes.
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if (osKernelSysTick() > (start + timeout)) {
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return abort_tx(frame); // Abort DMA xfer on timeout.
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} else {
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osThreadYield();
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}
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}
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memcpy(TxBuffer, tmpBuffer, TX_BUFFER_SIZE);
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txDoneFlag = false;
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while (open_ and HAL_UART_Transmit_DMA(&huart3, TxBuffer, TX_BUFFER_SIZE) == HAL_BUSY)
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{
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// This should not happen. HAL_BUSY should not occur when txDoneFlag set.
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if (osKernelSysTick() > (start + timeout)) {
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return abort_tx(frame); // Abort DMA xfer on timeout.
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} else {
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osThreadYield();
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}
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}
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pos = 0;
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}
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}
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// Buffer has room for at least one more byte.
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tmpBuffer[pos++] = 0xC0;
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while (!txDoneFlag) {
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// txDoneFlag set in HAL_UART_TxCpltCallback() above when DMA completes.
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if (osKernelSysTick() > (start + timeout)) {
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return abort_tx(frame); // Abort DMA xfer on timeout.
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} else {
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osThreadYield();
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}
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}
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memcpy(TxBuffer, tmpBuffer, TX_BUFFER_SIZE);
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txDoneFlag = false;
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while (open_ and HAL_UART_Transmit_DMA(&huart3, TxBuffer, pos) == HAL_BUSY) {
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// This should not happen. HAL_BUSY should not occur when txDoneFlag set.
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if (osKernelSysTick() > (start + timeout)) {
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return abort_tx(frame); // Abort DMA xfer on timeout.
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} else {
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osThreadYield();
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}
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}
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osMutexRelease(mutex_);
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hdlc::release(frame);
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DEBUG("SerialPort::write COMPLETE");
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return true;
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}
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SerialPort* getSerialPort()
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{
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static SerialPort instance;
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return &instance;
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}
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}} // mobilinkd::tnc
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