electrocardiograph_upper/src/qt_serial_datachannel.cpp

#include "qt_serial_datachannel.hpp"

//

#include <QtSerialPort/QSerialPort>
#include <QtSerialPort/QSerialPortInfo>

#pragma comment(lib, "ws2_32.lib")

#include "logger.hpp"

using namespace iflytop;
using namespace std;

#define TAG "QTDataChannel"

void QTDataChannel::init() {
  m_thread.reset(new thread([this]() {
    while (true) {
      if (m_isOpen) {
        uint8_t rx[1024] = {0};
        int     rx_cnt   = com_receive(rx, 1024);
        if (rx_cnt != 0) {
          ZLOGI(TAG, "rx %s ", zhex2str(rx, rx_cnt).c_str());
          if (m_rxcb) m_rxcb(rx, rx_cnt);
        }
        this_thread::sleep_for(chrono::microseconds(1));
      } else {
        this_thread::sleep_for(chrono::microseconds(1000));
      }
    }
  }));
}
bool QTDataChannel::open() {
  char portnamebuf[256] = {0};
  sprintf(portnamebuf, "\\\\.\\%s", m_name.c_str());
  m_CommHandler = CreateFileA(portnamebuf,                   // port name
                              GENERIC_READ | GENERIC_WRITE,  // Read/Write
                              0,                             // No Sharing
                              NULL,                          // No Security
                              OPEN_EXISTING,                 // Open existing port only
                              0,                             // Non Overlapped I/O
                              NULL);                         // Null for Comm Devices
  if (m_CommHandler == INVALID_HANDLE_VALUE) {
    ZLOGI(TAG, "Error in opening serial port");
    return false;
  }
  DCB p;
  memset(&p, 0, sizeof(p));
  p.DCBlength = sizeof(p);
  p.BaudRate  = m_baudRate;  // 波特率

  switch (m_dataBits) {
    case QSerialPort::Data5:
      p.ByteSize = 5;
      break;
    case QSerialPort::Data6:
      p.ByteSize = 6;
      break;
    case QSerialPort::Data7:
      p.ByteSize = 7;
      break;
    case QSerialPort::Data8:
      p.ByteSize = 8;
      break;
    default:
      p.ByteSize = 8;
      break;
  }

  // QSerialPort::NoParity = 0,
  // QSerialPort::EvenParity = 2,
  // QSerialPort::OddParity = 3,
  // QSerialPort::SpaceParity = 4,
  // QSerialPort::MarkParity = 5,
  // QSerialPort::UnknownParity = -1

  switch (m_parity)  // 校验位
  {
    case QSerialPort::NoParity:
      p.Parity = NOPARITY;  // 无校验
      break;
    case QSerialPort::EvenParity:
      p.Parity = EVENPARITY;  // 奇校验
      break;
    case QSerialPort::OddParity:
      p.Parity = ODDPARITY;  // 偶校验
      break;
    case QSerialPort::MarkParity:
      p.Parity = MARKPARITY;  // 标记校验
      break;
    default:
      p.Parity = NOPARITY;  // 无校验
  }

  switch (m_stopBits)  // 停止位
  {
    case QSerialPort::OneStop:
      p.StopBits = ONESTOPBIT;  // 1位停止位
      break;
    case QSerialPort::OneAndHalfStop:
      p.StopBits = TWOSTOPBITS;  // 2位停止位
      break;
    case QSerialPort::TwoStop:
      p.StopBits = ONE5STOPBITS;  // 1.5位停止位
      break;
    default:
      p.StopBits = ONESTOPBIT;  // 无校验
  }

  if (!SetCommState(m_CommHandler, &p)) {
    // 设置参数失败
    CloseHandle(m_CommHandler);
    return false;
  }
  m_isOpen = true;
  return true;
}

void QTDataChannel::close() {
  CloseHandle(m_CommHandler);
  m_isOpen = false;
}

bool QTDataChannel::isOpen() { return m_isOpen; }
bool QTDataChannel::send(const uint8_t *data, size_t len) {
  ZLOGI(TAG, "send %s", zhex2str(data, len).c_str());

  DWORD dwBytesWrite = len;
  BOOL  bWriteStat   = WriteFile(m_CommHandler,  // 串口句柄
                                 (char *)data,   // 数据首地址
                                 dwBytesWrite,   // 要发送的数据字节数
                                 &dwBytesWrite,  // DWORD*，用来接收返回成功发送的数据字节数
                                 NULL);          // NULL为同步发送，OVERLAPPED*为异步发送
  return dwBytesWrite;
}
void QTDataChannel::regRxListener(function<void(uint8_t *data, size_t len)> cb) { m_rxcb = cb; }

int QTDataChannel::com_receive(uint8_t *rxbuf, int rxbufsize) {
  COMMTIMEOUTS TimeOuts;
  GetCommTimeouts(m_CommHandler, &TimeOuts);
  TimeOuts.ReadIntervalTimeout        = 0;  // 读间隔超时
  TimeOuts.ReadTotalTimeoutMultiplier = 0;  // 读时间系数
  TimeOuts.ReadTotalTimeoutConstant   = 1;  // 读时间常量
  SetCommTimeouts(m_CommHandler, &TimeOuts);

  // PurgeComm(m_CommHandler, PURGE_RXCLEAR);

  DWORD wCount    = rxbufsize;               // 成功读取的数据字节数
  BOOL  bReadStat = ReadFile(m_CommHandler,  // 串口句柄
                             rxbuf,          // 数据首地址
                             wCount,         // 要读取的数据最大字节数
                             &wCount,        // DWORD*,用来接收返回成功读取的数据字节数
                             NULL);
  return wCount;
}