mirror of
https://github.com/hyperion-project/hyperion.ng.git
synced 2025-03-01 10:33:28 +00:00
602 lines
13 KiB
C++
602 lines
13 KiB
C++
#if defined(_WIN32)
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/* Copyright 2012 William Woodall and John Harrison */
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#include "serial/impl/win.h"
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using std::string;
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using std::wstring;
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using std::stringstream;
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using std::invalid_argument;
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using serial::Serial;
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using serial::Timeout;
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using serial::bytesize_t;
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using serial::parity_t;
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using serial::stopbits_t;
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using serial::flowcontrol_t;
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using serial::SerialException;
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using serial::PortNotOpenedException;
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using serial::IOException;
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Serial::SerialImpl::SerialImpl (const string &port, unsigned long baudrate,
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bytesize_t bytesize,
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parity_t parity, stopbits_t stopbits,
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flowcontrol_t flowcontrol)
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: port_ (port.begin(), port.end()), fd_ (INVALID_HANDLE_VALUE), is_open_ (false),
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baudrate_ (baudrate), parity_ (parity),
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bytesize_ (bytesize), stopbits_ (stopbits), flowcontrol_ (flowcontrol)
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{
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read_mutex = CreateMutex(NULL, false, NULL);
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write_mutex = CreateMutex(NULL, false, NULL);
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if (port_.empty () == false)
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open ();
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}
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Serial::SerialImpl::~SerialImpl ()
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{
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this->close();
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CloseHandle(read_mutex);
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CloseHandle(write_mutex);
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}
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void
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Serial::SerialImpl::open ()
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{
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if (port_.empty ()) {
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throw invalid_argument ("Empty port is invalid.");
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}
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if (is_open_ == true) {
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throw SerialException ("Serial port already open.");
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}
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LPCWSTR lp_port = port_.c_str();
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fd_ = CreateFileW(lp_port,
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GENERIC_READ | GENERIC_WRITE,
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0,
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0,
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OPEN_EXISTING,
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FILE_ATTRIBUTE_NORMAL,
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0);
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if (fd_ == INVALID_HANDLE_VALUE) {
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DWORD errno_ = GetLastError();
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stringstream ss;
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switch (errno_) {
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case ERROR_FILE_NOT_FOUND:
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// Use this->getPort to convert to a std::string
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ss << "Specified port, " << this->getPort() << ", does not exist.";
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THROW (IOException, ss.str().c_str());
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default:
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ss << "Unknown error opening the serial port: " << errno;
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THROW (IOException, ss.str().c_str());
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}
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}
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reconfigurePort();
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is_open_ = true;
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}
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void
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Serial::SerialImpl::reconfigurePort ()
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{
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if (fd_ == INVALID_HANDLE_VALUE) {
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// Can only operate on a valid file descriptor
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THROW (IOException, "Invalid file descriptor, is the serial port open?");
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}
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DCB dcbSerialParams = {0};
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dcbSerialParams.DCBlength=sizeof(dcbSerialParams);
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if (!GetCommState(fd_, &dcbSerialParams)) {
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//error getting state
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THROW (IOException, "Error getting the serial port state.");
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}
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// setup baud rate
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switch (baudrate_) {
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#ifdef CBR_0
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case 0: dcbSerialParams.BaudRate = CBR_0; break;
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#endif
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#ifdef CBR_50
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case 50: dcbSerialParams.BaudRate = CBR_50; break;
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#endif
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#ifdef CBR_75
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case 75: dcbSerialParams.BaudRate = CBR_75; break;
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#endif
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#ifdef CBR_110
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case 110: dcbSerialParams.BaudRate = CBR_110; break;
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#endif
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#ifdef CBR_134
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case 134: dcbSerialParams.BaudRate = CBR_134; break;
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#endif
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#ifdef CBR_150
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case 150: dcbSerialParams.BaudRate = CBR_150; break;
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#endif
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#ifdef CBR_200
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case 200: dcbSerialParams.BaudRate = CBR_200; break;
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#endif
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#ifdef CBR_300
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case 300: dcbSerialParams.BaudRate = CBR_300; break;
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#endif
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#ifdef CBR_600
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case 600: dcbSerialParams.BaudRate = CBR_600; break;
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#endif
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#ifdef CBR_1200
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case 1200: dcbSerialParams.BaudRate = CBR_1200; break;
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#endif
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#ifdef CBR_1800
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case 1800: dcbSerialParams.BaudRate = CBR_1800; break;
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#endif
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#ifdef CBR_2400
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case 2400: dcbSerialParams.BaudRate = CBR_2400; break;
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#endif
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#ifdef CBR_4800
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case 4800: dcbSerialParams.BaudRate = CBR_4800; break;
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#endif
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#ifdef CBR_7200
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case 7200: dcbSerialParams.BaudRate = CBR_7200; break;
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#endif
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#ifdef CBR_9600
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case 9600: dcbSerialParams.BaudRate = CBR_9600; break;
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#endif
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#ifdef CBR_14400
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case 14400: dcbSerialParams.BaudRate = CBR_14400; break;
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#endif
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#ifdef CBR_19200
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case 19200: dcbSerialParams.BaudRate = CBR_19200; break;
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#endif
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#ifdef CBR_28800
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case 28800: dcbSerialParams.BaudRate = CBR_28800; break;
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#endif
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#ifdef CBR_57600
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case 57600: dcbSerialParams.BaudRate = CBR_57600; break;
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#endif
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#ifdef CBR_76800
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case 76800: dcbSerialParams.BaudRate = CBR_76800; break;
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#endif
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#ifdef CBR_38400
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case 38400: dcbSerialParams.BaudRate = CBR_38400; break;
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#endif
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#ifdef CBR_115200
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case 115200: dcbSerialParams.BaudRate = CBR_115200; break;
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#endif
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#ifdef CBR_128000
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case 128000: dcbSerialParams.BaudRate = CBR_128000; break;
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#endif
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#ifdef CBR_153600
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case 153600: dcbSerialParams.BaudRate = CBR_153600; break;
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#endif
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#ifdef CBR_230400
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case 230400: dcbSerialParams.BaudRate = CBR_230400; break;
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#endif
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#ifdef CBR_256000
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case 256000: dcbSerialParams.BaudRate = CBR_256000; break;
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#endif
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#ifdef CBR_460800
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case 460800: dcbSerialParams.BaudRate = CBR_460800; break;
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#endif
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#ifdef CBR_921600
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case 921600: dcbSerialParams.BaudRate = CBR_921600; break;
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#endif
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default:
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// Try to blindly assign it
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dcbSerialParams.BaudRate = baudrate_;
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}
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// setup char len
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if (bytesize_ == eightbits)
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dcbSerialParams.ByteSize = 8;
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else if (bytesize_ == sevenbits)
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dcbSerialParams.ByteSize = 7;
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else if (bytesize_ == sixbits)
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dcbSerialParams.ByteSize = 6;
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else if (bytesize_ == fivebits)
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dcbSerialParams.ByteSize = 5;
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else
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throw invalid_argument ("invalid char len");
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// setup stopbits
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if (stopbits_ == stopbits_one)
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dcbSerialParams.StopBits = ONESTOPBIT;
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else if (stopbits_ == stopbits_one_point_five)
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dcbSerialParams.StopBits = ONE5STOPBITS;
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else if (stopbits_ == stopbits_two)
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dcbSerialParams.StopBits = TWOSTOPBITS;
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else
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throw invalid_argument ("invalid stop bit");
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// setup parity
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if (parity_ == parity_none) {
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dcbSerialParams.Parity = NOPARITY;
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} else if (parity_ == parity_even) {
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dcbSerialParams.Parity = EVENPARITY;
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} else if (parity_ == parity_odd) {
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dcbSerialParams.Parity = ODDPARITY;
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} else {
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throw invalid_argument ("invalid parity");
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}
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// setup flowcontrol
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if (flowcontrol_ == flowcontrol_none) {
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dcbSerialParams.fOutxCtsFlow = false;
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dcbSerialParams.fRtsControl = 0x00;
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dcbSerialParams.fOutX = false;
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dcbSerialParams.fInX = false;
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}
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if (flowcontrol_ == flowcontrol_software) {
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dcbSerialParams.fOutxCtsFlow = false;
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dcbSerialParams.fRtsControl = 0x00;
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dcbSerialParams.fOutX = true;
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dcbSerialParams.fInX = true;
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}
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if (flowcontrol_ == flowcontrol_hardware) {
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dcbSerialParams.fOutxCtsFlow = true;
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dcbSerialParams.fRtsControl = 0x03;
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dcbSerialParams.fOutX = false;
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dcbSerialParams.fInX = false;
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}
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// activate settings
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if (!SetCommState(fd_, &dcbSerialParams)){
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THROW (IOException, "Error setting serial port settings.");
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}
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// Setup timeouts
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COMMTIMEOUTS timeouts = {0};
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timeouts.ReadIntervalTimeout = timeout_.inter_byte_timeout;
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timeouts.ReadTotalTimeoutConstant = timeout_.read_timeout_constant;
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timeouts.ReadTotalTimeoutMultiplier = timeout_.read_timeout_multiplier;
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timeouts.WriteTotalTimeoutConstant = timeout_.write_timeout_constant;
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timeouts.WriteTotalTimeoutMultiplier = timeout_.write_timeout_multiplier;
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if (!SetCommTimeouts(fd_, &timeouts)) {
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THROW (IOException, "Error setting timeouts.");
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}
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}
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void
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Serial::SerialImpl::close ()
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{
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if (is_open_ == true) {
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if (fd_ != INVALID_HANDLE_VALUE) {
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CloseHandle(fd_);
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fd_ = INVALID_HANDLE_VALUE;
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}
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is_open_ = false;
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}
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}
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bool
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Serial::SerialImpl::isOpen () const
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{
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return is_open_;
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}
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size_t
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Serial::SerialImpl::available ()
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{
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if (!is_open_) {
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return 0;
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}
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COMSTAT cs;
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if (!ClearCommError(fd_, NULL, &cs)) {
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stringstream ss;
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ss << "Error while checking status of the serial port: " << GetLastError();
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THROW (IOException, ss.str().c_str());
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}
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return static_cast<size_t>(cs.cbInQue);
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}
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size_t
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Serial::SerialImpl::read (uint8_t *buf, size_t size)
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{
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if (!is_open_) {
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throw PortNotOpenedException ("Serial::read");
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}
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DWORD bytes_read;
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if (!ReadFile(fd_, buf, size, &bytes_read, NULL)) {
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stringstream ss;
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ss << "Error while reading from the serial port: " << GetLastError();
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THROW (IOException, ss.str().c_str());
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}
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return (size_t) (bytes_read);
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}
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size_t
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Serial::SerialImpl::write (const uint8_t *data, size_t length)
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{
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if (is_open_ == false) {
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throw PortNotOpenedException ("Serial::write");
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}
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DWORD bytes_written;
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if (!WriteFile(fd_, data, length, &bytes_written, NULL)) {
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stringstream ss;
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ss << "Error while writing to the serial port: " << GetLastError();
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THROW (IOException, ss.str().c_str());
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}
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return (size_t) (bytes_written);
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}
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void
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Serial::SerialImpl::setPort (const string &port)
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{
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port_ = wstring(port.begin(), port.end());
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}
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string
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Serial::SerialImpl::getPort () const
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{
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return string(port_.begin(), port_.end());
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}
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void
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Serial::SerialImpl::setTimeout (serial::Timeout &timeout)
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{
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timeout_ = timeout;
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if (is_open_) {
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reconfigurePort ();
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}
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}
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serial::Timeout
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Serial::SerialImpl::getTimeout () const
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{
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return timeout_;
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}
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void
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Serial::SerialImpl::setBaudrate (unsigned long baudrate)
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{
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baudrate_ = baudrate;
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if (is_open_) {
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reconfigurePort ();
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}
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}
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unsigned long
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Serial::SerialImpl::getBaudrate () const
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{
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return baudrate_;
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}
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void
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Serial::SerialImpl::setBytesize (serial::bytesize_t bytesize)
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{
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bytesize_ = bytesize;
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if (is_open_) {
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reconfigurePort ();
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}
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}
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serial::bytesize_t
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Serial::SerialImpl::getBytesize () const
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{
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return bytesize_;
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}
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void
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Serial::SerialImpl::setParity (serial::parity_t parity)
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{
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parity_ = parity;
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if (is_open_) {
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reconfigurePort ();
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}
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}
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serial::parity_t
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Serial::SerialImpl::getParity () const
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{
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return parity_;
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}
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void
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Serial::SerialImpl::setStopbits (serial::stopbits_t stopbits)
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{
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stopbits_ = stopbits;
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if (is_open_) {
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reconfigurePort ();
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}
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}
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serial::stopbits_t
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Serial::SerialImpl::getStopbits () const
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{
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return stopbits_;
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}
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void
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Serial::SerialImpl::setFlowcontrol (serial::flowcontrol_t flowcontrol)
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{
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flowcontrol_ = flowcontrol;
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if (is_open_) {
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reconfigurePort ();
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}
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}
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serial::flowcontrol_t
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Serial::SerialImpl::getFlowcontrol () const
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{
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return flowcontrol_;
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}
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void
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Serial::SerialImpl::flush ()
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{
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if (is_open_ == false) {
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throw PortNotOpenedException ("Serial::flush");
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}
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FlushFileBuffers (fd_);
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}
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void
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Serial::SerialImpl::flushInput ()
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{
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THROW (IOException, "flushInput is not supported on Windows.");
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}
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void
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Serial::SerialImpl::flushOutput ()
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{
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THROW (IOException, "flushOutput is not supported on Windows.");
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}
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void
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Serial::SerialImpl::sendBreak (int duration)
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{
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THROW (IOException, "sendBreak is not supported on Windows.");
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}
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void
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Serial::SerialImpl::setBreak (bool level)
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{
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if (is_open_ == false) {
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throw PortNotOpenedException ("Serial::setBreak");
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}
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if (level) {
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EscapeCommFunction (fd_, SETBREAK);
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} else {
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EscapeCommFunction (fd_, CLRBREAK);
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}
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}
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void
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Serial::SerialImpl::setRTS (bool level)
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{
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if (is_open_ == false) {
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throw PortNotOpenedException ("Serial::setRTS");
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}
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if (level) {
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EscapeCommFunction (fd_, SETRTS);
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} else {
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EscapeCommFunction (fd_, CLRRTS);
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}
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}
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void
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Serial::SerialImpl::setDTR (bool level)
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{
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if (is_open_ == false) {
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throw PortNotOpenedException ("Serial::setDTR");
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}
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if (level) {
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EscapeCommFunction (fd_, SETDTR);
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} else {
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EscapeCommFunction (fd_, CLRDTR);
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}
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}
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bool
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Serial::SerialImpl::waitForChange ()
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{
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if (is_open_ == false) {
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throw PortNotOpenedException ("Serial::waitForChange");
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}
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DWORD dwCommEvent;
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if (!SetCommMask(fd_, EV_CTS | EV_DSR | EV_RING | EV_RLSD)) {
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// Error setting communications mask
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return false;
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}
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if (!WaitCommEvent(fd_, &dwCommEvent, NULL)) {
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// An error occurred waiting for the event.
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return false;
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} else {
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// Event has occurred.
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return true;
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}
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}
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bool
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Serial::SerialImpl::getCTS ()
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{
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if (is_open_ == false) {
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throw PortNotOpenedException ("Serial::getCTS");
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}
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DWORD dwModemStatus;
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if (!GetCommModemStatus(fd_, &dwModemStatus)) {
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THROW (IOException, "Error getting the status of the CTS line.");
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}
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return (MS_CTS_ON & dwModemStatus) != 0;
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}
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bool
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Serial::SerialImpl::getDSR ()
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{
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if (is_open_ == false) {
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throw PortNotOpenedException ("Serial::getDSR");
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}
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DWORD dwModemStatus;
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if (!GetCommModemStatus(fd_, &dwModemStatus)) {
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THROW (IOException, "Error getting the status of the DSR line.");
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}
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return (MS_DSR_ON & dwModemStatus) != 0;
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}
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bool
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Serial::SerialImpl::getRI()
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{
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if (is_open_ == false) {
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throw PortNotOpenedException ("Serial::getRI");
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}
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DWORD dwModemStatus;
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if (!GetCommModemStatus(fd_, &dwModemStatus)) {
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THROW (IOException, "Error getting the status of the RI line.");
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}
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return (MS_RING_ON & dwModemStatus) != 0;
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}
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bool
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Serial::SerialImpl::getCD()
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{
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if (is_open_ == false) {
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throw PortNotOpenedException ("Serial::getCD");
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}
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DWORD dwModemStatus;
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if (!GetCommModemStatus(fd_, &dwModemStatus)) {
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// Error in GetCommModemStatus;
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THROW (IOException, "Error getting the status of the CD line.");
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}
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return (MS_RLSD_ON & dwModemStatus) != 0;
|
|
}
|
|
|
|
void
|
|
Serial::SerialImpl::readLock()
|
|
{
|
|
if (WaitForSingleObject(read_mutex, INFINITE) != WAIT_OBJECT_0) {
|
|
THROW (IOException, "Error claiming read mutex.");
|
|
}
|
|
}
|
|
|
|
void
|
|
Serial::SerialImpl::readUnlock()
|
|
{
|
|
if (!ReleaseMutex(read_mutex)) {
|
|
THROW (IOException, "Error releasing read mutex.");
|
|
}
|
|
}
|
|
|
|
void
|
|
Serial::SerialImpl::writeLock()
|
|
{
|
|
if (WaitForSingleObject(write_mutex, INFINITE) != WAIT_OBJECT_0) {
|
|
THROW (IOException, "Error claiming write mutex.");
|
|
}
|
|
}
|
|
|
|
void
|
|
Serial::SerialImpl::writeUnlock()
|
|
{
|
|
if (!ReleaseMutex(write_mutex)) {
|
|
THROW (IOException, "Error releasing write mutex.");
|
|
}
|
|
}
|
|
|
|
#endif // #if defined(_WIN32)
|
|
|