FreeCalypso > hg > freecalypso-tools

annotate libserial-orig/setbaud.c @ 407:19e5a3e2f9c0

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
fcup-settime: moved time() retrieval a little closer to the output A fundamental problem with all simple time transfer tools is that there is always some delay between the time retrieval on the source system and that transmitted time being set on the destination, and the resulting time on the destination system is off by that delay amount. This delay cannot be fully eliminated when working in a simple environment like ours, but we should make our best effort to minimize it. In the present case, moving the atinterf_init() call before the time() retrieval should make a teensy-tiny improvement.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 11 Aug 2018 21:52:17 +0000
parents cb1ba53a1106
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
248
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 * This module implements the termios/ioctl setting of the baud rate.
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 */
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5 #include <sys/types.h>
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 #include <sys/ioctl.h>
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 #include <termios.h>
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 #include <stdio.h>
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 #include <stdlib.h>
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 #include <unistd.h>
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 #include "baudrate.h"
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 extern int target_fd;
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 struct baudrate *current_baud_rate;
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 set_serial_baudrate(br)
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18 struct baudrate *br;
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 {
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 struct termios target_termios;
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 target_termios.c_iflag = IGNBRK;
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 target_termios.c_oflag = 0;
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 target_termios.c_cflag = CLOCAL|HUPCL|CREAD|CS8;
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 target_termios.c_lflag = 0;
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 target_termios.c_cc[VMIN] = 1;
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 target_termios.c_cc[VTIME] = 0;
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 cfsetispeed(&target_termios, br->termios_code);
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 cfsetospeed(&target_termios, br->termios_code);
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 if (tcsetattr(target_fd, TCSAFLUSH, &target_termios) < 0) {
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 perror("tcsetattr");
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 exit(1);
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
33 }
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
34 current_baud_rate = br;
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
35 return 0;
cb1ba53a1106 beginning of factored-out libserial
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
36 }