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Rationalise the pseudo tty handling.

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This commit is contained in:
Jonathan Naylor
2020-06-27 22:33:24 +01:00
parent bdb1c49bae
commit d1a809808b
4 changed files with 120 additions and 188 deletions
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190
SerialController.cpp
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@@ -247,101 +247,107 @@ bool CSerialController::open()
return false;
}
if (::isatty(m_fd)) {
termios termios;
if (::tcgetattr(m_fd, &termios) < 0) {
LogError("Cannot get the attributes for %s", m_device.c_str());
::close(m_fd);
return false;
}
if (::isatty(m_fd))
return setRaw();
return true;
}
termios.c_iflag &= ~(IGNBRK | BRKINT | IGNPAR | PARMRK | INPCK);
termios.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL);
termios.c_iflag &= ~(IXON | IXOFF | IXANY);
termios.c_oflag &= ~(OPOST);
termios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CRTSCTS);
termios.c_cflag |= (CS8 | CLOCAL | CREAD);
termios.c_lflag &= ~(ISIG | ICANON | IEXTEN);
termios.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
#if defined(__APPLE__)
termios.c_cc[VMIN] = 1;
termios.c_cc[VTIME] = 1;
#else
termios.c_cc[VMIN] = 0;
termios.c_cc[VTIME] = 10;
#endif
switch (m_speed) {
case 1200U:
::cfsetospeed(&termios, B1200);
::cfsetispeed(&termios, B1200);
break;
case 2400U:
::cfsetospeed(&termios, B2400);
::cfsetispeed(&termios, B2400);
break;
case 4800U:
::cfsetospeed(&termios, B4800);
::cfsetispeed(&termios, B4800);
break;
case 9600U:
::cfsetospeed(&termios, B9600);
::cfsetispeed(&termios, B9600);
break;
case 19200U:
::cfsetospeed(&termios, B19200);
::cfsetispeed(&termios, B19200);
break;
case 38400U:
::cfsetospeed(&termios, B38400);
::cfsetispeed(&termios, B38400);
break;
case 115200U:
::cfsetospeed(&termios, B115200);
::cfsetispeed(&termios, B115200);
break;
case 230400U:
::cfsetospeed(&termios, B230400);
::cfsetispeed(&termios, B230400);
break;
case 460800U:
::cfsetospeed(&termios, B460800);
::cfsetispeed(&termios, B460800);
break;
default:
LogError("Unsupported serial port speed - %u", m_speed);
::close(m_fd);
return false;
}
if (::tcsetattr(m_fd, TCSANOW, &termios) < 0) {
LogError("Cannot set the attributes for %s", m_device.c_str());
::close(m_fd);
return false;
}
if (m_assertRTS) {
unsigned int y;
if (::ioctl(m_fd, TIOCMGET, &y) < 0) {
LogError("Cannot get the control attributes for %s", m_device.c_str());
::close(m_fd);
return false;
}
y |= TIOCM_RTS;
if (::ioctl(m_fd, TIOCMSET, &y) < 0) {
LogError("Cannot set the control attributes for %s", m_device.c_str());
::close(m_fd);
return false;
}
}
#if defined(__APPLE__)
setNonblock(false);
#endif
bool CSerialController::setRaw()
{
termios termios;
if (::tcgetattr(m_fd, &termios) < 0) {
LogError("Cannot get the attributes for %s", m_device.c_str());
::close(m_fd);
return false;
}
termios.c_iflag &= ~(IGNBRK | BRKINT | IGNPAR | PARMRK | INPCK);
termios.c_iflag &= ~(ISTRIP | INLCR | IGNCR | ICRNL);
termios.c_iflag &= ~(IXON | IXOFF | IXANY);
termios.c_oflag &= ~(OPOST);
termios.c_cflag &= ~(CSIZE | CSTOPB | PARENB | CRTSCTS);
termios.c_cflag |= (CS8 | CLOCAL | CREAD);
termios.c_lflag &= ~(ISIG | ICANON | IEXTEN);
termios.c_lflag &= ~(ECHO | ECHOE | ECHOK | ECHONL);
#if defined(__APPLE__)
termios.c_cc[VMIN] = 1;
termios.c_cc[VTIME] = 1;
#else
termios.c_cc[VMIN] = 0;
termios.c_cc[VTIME] = 10;
#endif
switch (m_speed) {
case 1200U:
::cfsetospeed(&termios, B1200);
::cfsetispeed(&termios, B1200);
break;
case 2400U:
::cfsetospeed(&termios, B2400);
::cfsetispeed(&termios, B2400);
break;
case 4800U:
::cfsetospeed(&termios, B4800);
::cfsetispeed(&termios, B4800);
break;
case 9600U:
::cfsetospeed(&termios, B9600);
::cfsetispeed(&termios, B9600);
break;
case 19200U:
::cfsetospeed(&termios, B19200);
::cfsetispeed(&termios, B19200);
break;
case 38400U:
::cfsetospeed(&termios, B38400);
::cfsetispeed(&termios, B38400);
break;
case 115200U:
::cfsetospeed(&termios, B115200);
::cfsetispeed(&termios, B115200);
break;
case 230400U:
::cfsetospeed(&termios, B230400);
::cfsetispeed(&termios, B230400);
break;
case 460800U:
::cfsetospeed(&termios, B460800);
::cfsetispeed(&termios, B460800);
break;
default:
LogError("Unsupported serial port speed - %u", m_speed);
::close(m_fd);
return false;
}
if (::tcsetattr(m_fd, TCSANOW, &termios) < 0) {
LogError("Cannot set the attributes for %s", m_device.c_str());
::close(m_fd);
return false;
}
if (m_assertRTS) {
unsigned int y;
if (::ioctl(m_fd, TIOCMGET, &y) < 0) {
LogError("Cannot get the control attributes for %s", m_device.c_str());
::close(m_fd);
return false;
}
y |= TIOCM_RTS;
if (::ioctl(m_fd, TIOCMSET, &y) < 0) {
LogError("Cannot set the control attributes for %s", m_device.c_str());
::close(m_fd);
return false;
}
}
#if defined(__APPLE__)
setNonblock(false);
#endif
return true;
}