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#include <sstream>
#include <cstdio>
#include "ExitCodes.hpp"
#include "SerialPortWin32.hpp"
#include "Logger.hpp"
using std::ostringstream;
using std::istringstream;
//Returns the last Win32 error, in string format. Returns an empty string if there is no error.
string
CSerialPortWin32::getLastErrorAsString()
{
DWORD e = GetLastError();
if (e == 0)
return string();
LPSTR msgBuff = nullptr;
size_t size = FormatMessageA(
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
e,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPSTR) &msgBuff,
0,
NULL);
string m(msgBuff, size);
LocalFree(msgBuff);
return m;
}
CSerialPortWin32::CSerialPortWin32()
{
mSerialPortH = INVALID_HANDLE_VALUE;
mMaxBaudrates.push_back(s_speed("User defined", BAUD_USER, 0));
mMaxBaudrates.push_back(s_speed("75", BAUD_075, 75));
mMaxBaudrates.push_back(s_speed("110", BAUD_110, 110));
mMaxBaudrates.push_back(s_speed("134.5", BAUD_134_5, 134));
mMaxBaudrates.push_back(s_speed("150", BAUD_150, 150));
mMaxBaudrates.push_back(s_speed("300", BAUD_300, 300));
mMaxBaudrates.push_back(s_speed("600", BAUD_600, 600));
mMaxBaudrates.push_back(s_speed("1200", BAUD_1200, 1200));
mMaxBaudrates.push_back(s_speed("1800", BAUD_1800, 1800));
mMaxBaudrates.push_back(s_speed("2400", BAUD_2400, 2400));
mMaxBaudrates.push_back(s_speed("4800", BAUD_4800, 4800));
mMaxBaudrates.push_back(s_speed("7200", BAUD_7200, 7200));
mMaxBaudrates.push_back(s_speed("9600", BAUD_9600, 9600));
mMaxBaudrates.push_back(s_speed("14400", BAUD_14400, 14400));
mMaxBaudrates.push_back(s_speed("19200", BAUD_19200, 19200));
mMaxBaudrates.push_back(s_speed("38400", BAUD_38400, 38400));
mMaxBaudrates.push_back(s_speed("56000", BAUD_56K, 56000));
mMaxBaudrates.push_back(s_speed("57600", BAUD_57600, 576000));
mMaxBaudrates.push_back(s_speed("115200", BAUD_115200, 115200));
mMaxBaudrates.push_back(s_speed("128000", BAUD_128K, 128000));
}
CSerialPortWin32::~CSerialPortWin32()
{
;
}
void
CSerialPortWin32::openPort(string portName)
{
if (mSerialPortH == INVALID_HANDLE_VALUE) {
// Construct Windows serial port name
ostringstream sn;
sn << "\\\\.\\" << portName;
// Open serial port
mSerialPortH = CreateFile(sn.str().c_str(), // 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 (mSerialPortH == INVALID_HANDLE_VALUE) {
CLogger::error("Cannot open port " + portName + ": " + getLastErrorAsString(),
EXIT_SERIAL_PORT);
}
}
}
void
CSerialPortWin32::open(string portName, string speed)
{
this->setDefaultTimeout();
openPort(portName);
DWORD ms = getMaxSpeed(portName).value;
// Konfiguracia
DCB dcbSerialParams = { 0 };
dcbSerialParams.DCBlength = sizeof(dcbSerialParams);
if (GetCommState(mSerialPortH, &dcbSerialParams) == 0) {
CLogger::error("Cannot get state for port " + portName + ": " + getLastErrorAsString(),
EXIT_SERIAL_PORT);
}
// Set speed
istringstream is(speed);
DWORD n;
is >> n;
if (n == 0) {
// User has requested default baudrate
n = ((ms == 0) || (19200 <= ms)) ? 19200 : ms;
} else if ((ms != 0) && (n > ms)) {
ostringstream os;
os << "Baudrate " << n << " Bd is higher than max. baudrate " << ms << " Bd supported by " << portName;
CLogger::error(os.str(), EXIT_SERIAL_PORT);
}
dcbSerialParams.BaudRate = n;
dcbSerialParams.ByteSize = 8; // Setting ByteSize = 8
dcbSerialParams.StopBits = ONESTOPBIT;// Setting StopBits = 1
dcbSerialParams.Parity = NOPARITY; // Setting Parity = None
if (SetCommState(mSerialPortH, &dcbSerialParams) == 0) {
CLogger::error("Cannot set state for port " + portName + ": " + getLastErrorAsString(),
EXIT_SERIAL_PORT);
}
ostringstream os;
os << n;
CLogger::info("Serial port " + portName + " opened at speed " + os.str() + " Bd");
}
CSerialPortWin32::s_speed
CSerialPortWin32::getMaxSpeed(string portName)
{
COMMPROP cp;
if (GetCommProperties(mSerialPortH, &cp) == 0) {
CLogger::error("Cannot get properties of " + portName + " port: " + getLastErrorAsString(),
EXIT_SERIAL_PORT);
}
// Convert key to baudrate value
list<s_speed>::const_iterator it;
for (it = mMaxBaudrates.begin(); it != mMaxBaudrates.end(); ++it) {
if (it->key == cp.dwMaxBaud)
break;
}
return *it;
}
string
CSerialPortWin32::getSpeeds(string portName)
{
openPort(portName);
s_speed m = getMaxSpeed(portName);
ostringstream os;
os << "User defined baudrate";
if (m.key != BAUD_USER)
os << " up to the " << m.name << " Bd";
close();
return os.str();
}
void
CSerialPortWin32::close()
{
if (mSerialPortH != INVALID_HANDLE_VALUE) {
if (CloseHandle(mSerialPortH) == 0) {
CLogger::error("Cannot close serial port: " + getLastErrorAsString(),
EXIT_SERIAL_PORT);
}
mSerialPortH = INVALID_HANDLE_VALUE;
}
}
void
CSerialPortWin32::setTimeouts(int ms)
{
COMMTIMEOUTS timeouts;
if (!GetCommTimeouts(mSerialPortH, &timeouts)) {
CLogger::error("Cannot get timeouts for serial port: " + getLastErrorAsString(),
EXIT_SERIAL_PORT);
}
timeouts.ReadIntervalTimeout = ms;
timeouts.ReadTotalTimeoutMultiplier = ms;
timeouts.ReadTotalTimeoutConstant = 0;
timeouts.WriteTotalTimeoutMultiplier = ms;
timeouts.WriteTotalTimeoutConstant = 0;
if (!SetCommTimeouts(mSerialPortH, &timeouts)) {
CLogger::error("Cannot set timeouts for port: " + getLastErrorAsString(),
EXIT_SERIAL_PORT);
}
}
ssize_t
CSerialPortWin32::writeSingle(uint8_t *data, int data_length)
{
DWORD written = 0;
setTimeouts(mReadTimeoutMs);
// TODO: Rozlisovat medzi timeoutom a chybou
if (!WriteFile(mSerialPortH, data, data_length, &written, NULL)) {
CLogger::error("Cannot write data to the serial port: " + getLastErrorAsString(),
EXIT_SERIAL_PORT);
}
return written;
}
ssize_t
CSerialPortWin32::readSingle(uint8_t *data, int data_length)
{
DWORD read;
setTimeouts(mReadTimeoutMs);
if (!ReadFile(mSerialPortH, data, data_length, &read, NULL)) {
CLogger::error("Cannot read data from serial port: " + getLastErrorAsString(),
EXIT_SERIAL_PORT);
}
return read;
}
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