![]() Static uint8_t buf /* BUFSIZ from stdio.Usage: linux-serial-test -h, -help -b, -baud Baud rate, 115200, etc (115200 is default) -p, -port Port (/dev/ttyS0, etc) (must be specified) -d, -divisor UART Baud rate divisor (can be used to set custom baud rates) -R, -rx_dump Dump Rx data (ascii, raw) -T, -detailed_tx Detailed Tx data -s, -stats Dump serial port stats every 5s -S, -stop-on-err Stop program if we encounter an error -y, -single-byte Send specified byte to the serial port -z, -second-byte Send another specified byte to the serial port -c, -rts-cts Enable RTS/CTS flow control -B, -2-stop-bit Use two stop bits per character -P, -parity Use parity bit (odd, even, mark, space) -k, -loopback Use internal hardware loop back -K, -write-follow Write follows the read count (can be used for multi-serial loopback) -e, -dump-err Display errors -r, -no-rx Don't receive data (can be used to test flow control) when serial driver buffer is full -t, -no-tx Don't transmit data -l, -rx-delay Delay between reading data (ms) (can be used to test flow control) -a, -tx-delay Delay between writing data (ms) -w, -tx-bytes Number of bytes for each write (default is to repeatedly write 1024 bytes until no more are accepted) -q, -rs485 Enable RS485 direction control on port, and set delay from when TX is finished and RS485 driver enable is de-asserted. * TODO: make symlinks, unlink on atexit */ Loopback plugs are very useful for initial serial port troubleshooting, to ensure the serial port in question is functional. (void)ioctl(STDIN_FILENO, TIOCGWINSZ, &win) * create a pair of pseudo-terminal slaves connected to each other Here's an example C program I have used in a similar situation, it's not very polished and needs some way to communicate the names used. Your suggestion from the comment uses a kernel module, which is overkill and not as portable. You can either do it from Python with the standard pty module, or you use a small C program that just creates the pair, and then access it from the shell, a Python program or whatever just like a normal file. If you need to connect two programs, one of which insisting that it uses a tty-device (of which a serial port is an example), you can instead connect them using a pseudoterminal pair. In that case, what is a good way to do that? The issue is, that I got some udp messages that I can receive in for example python, that I need to send to a software, that only sees serial ports. Or should I look for a different approach. So the question is, what do I do wrong here? : Could not configure port: (5, 'Input/output error') Raise SerialException("Could not configure port: ".format(msg)) Self._reconfigure_port(force_update=True)įile "/home/el3/Envs/serial/lib/python2.7/site-packages/serial/serialposix.py", line 315, in _reconfigure_port ![]() > ser = serial.Serial("/dev/ttyS1",4800)įile "/home/el3/Envs/serial/lib/python2.7/site-packages/serial/serialutil.py", line 236, in _init_įile "/home/el3/Envs/serial/lib/python2.7/site-packages/serial/serialposix.py", line 272, in open Then in python I do like this, and get following error: > import serial ![]() I have added my user to group dialout and ran chmod o+rw /dev/ttyS1 ![]() I have tried looking at this answer how-to-send-data-to-a-serial-port-and-see-any-answer I am trying to write some data to a serial port, that I will read from forexample screen in the same computer. ![]()
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