diff options
Diffstat (limited to 'sercp.c')
| -rw-r--r-- | sercp.c | 47 |
1 files changed, 36 insertions, 11 deletions
@@ -18,6 +18,10 @@ /* * IFDEFS inspired here: * https://iq.opengenus.org/detect-operating-system-in-c/ + * + * vmin, vtime insipired here: + * // http://unixwiz.net/techtips/termios-vmin-vtime.html + * */ #ifdef _WIN32 @@ -162,7 +166,7 @@ void TestArgs (int argc, char *argv[]) }; c = getopt_long (argc, argv, "d:b:w:rvh", long_options, &option_index); if (c == -1) { - // konec parametru + // end of arguments break; } switch (c) { @@ -172,7 +176,6 @@ void TestArgs (int argc, char *argv[]) #else sprintf(SERIALDEVICE, "%s", optarg); #endif -// printf ("Serial port: %s\n", SERIALDEVICE); break; case 'b': baud_rate = atoi(optarg); @@ -656,8 +659,10 @@ void sercpSend(void) { } } printf("\nFile sent...\n"); - // FIXME na __APPLE__ tady pomaha pockat - // sleep_ms(5000); +#ifdef __APPLE__ + // FIXME on __APPLE__ this waiting helps + sleep_ms(wait_ms); +#endif fclose(tap_fd); } @@ -705,11 +710,30 @@ int OpenUart() { #else struct termios oldtio, newtio; /* open the device to be non-blocking (read will return immediatly) */ - serial_fd = open(SERIALDEVICE, O_RDWR | O_NOCTTY | O_NONBLOCK | O_NDELAY); + serial_fd = open(SERIALDEVICE, O_RDWR | O_NOCTTY | O_NONBLOCK); // | O_NDELAY if (serial_fd < 0) { perror(SERIALDEVICE); return(-1); } +#ifdef __APPLE__ + // Note that open() follows POSIX semantics: multiple open() calls to the same file will succeed + // unless the TIOCEXCL ioctl is issued. This will prevent additional opens except by root-owned + // processes. + // See tty(4) <x-man-page//4/tty> and ioctl(2) <x-man-page//2/ioctl> for details. + if (ioctl(serial_fd, TIOCEXCL) == -1) { + printf("Error setting TIOCEXCL on %s - %s(%d).\n", SERIALDEVICE, strerror(errno), errno); + return (-1); + } + + // Now that the device is open, clear the O_NONBLOCK flag so subsequent I/O will block. + // See fcntl(2) <x-man-page//2/fcntl> for details. + if (fcntl(serial_fd, F_SETFL, 0) == -1) { + printf("Error clearing O_NONBLOCK %s - %s(%d).\n", SERIALDEVICE, strerror(errno), errno); + return (-1); + } + + +#endif tcgetattr(serial_fd, &oldtio); /* save current port settings */ bzero(&newtio, sizeof (newtio)); cfmakeraw(&newtio); @@ -743,19 +767,21 @@ int OpenUart() { newtio.c_cflag = B38400; break; } - cfsetspeed(&newtio, baud_rate); + cfsetospeed(&newtio, baud_rate); + cfsetispeed(&newtio, baud_rate); // set ispeed same as ospeed (see POSIX) #if defined (__APPLE__) || defined (BSD) -// newtio.c_cflag |= CS8 | CLOCAL | CREAD | CCTS_OFLOW | CRTS_IFLOW; - newtio.c_cflag |= CS8 | CLOCAL | CREAD; + newtio.c_cflag |= CS8 | CLOCAL | CREAD | CCTS_OFLOW | CRTS_IFLOW | HUPCL; #else newtio.c_cflag |= CS8 | CLOCAL | CREAD | CRTSCTS; #endif newtio.c_iflag &= ~(IXON | IXOFF | IXANY); newtio.c_oflag &= ~(OPOST); + newtio.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG); // raw input printf ("Serial device: %s, communication speed is: %d Bd\n", SERIALDEVICE, baud_rate); + // http://unixwiz.net/techtips/termios-vmin-vtime.html - newtio.c_cc[VMIN] = 0; - newtio.c_cc[VTIME] = 0; + newtio.c_cc[VMIN] = 1; // minimum number to read + newtio.c_cc[VTIME] = 1; // time to wait tcsetattr(serial_fd, TCSANOW, &newtio); sleep_ms(20); tcflush(serial_fd, TCIOFLUSH); @@ -765,7 +791,6 @@ int OpenUart() { - /************************************************************************/ /************************************************************************/ int main(int argc, char** argv, char** env) |