FreeCalypso > hg > freecalypso-tools

annotate miscutil/fc-pulse-dtr.c @ 998:fb7442e3d430

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
CHANGES: mention flash write protection support
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 04 Dec 2023 02:17:54 +0000
parents 5b8287c655cf
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
735
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
1 /*
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
2 * This utility opens a serial port, asserts DTR for 50 ms, then negates it
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
3 * and exits. It is intended for use with FreeCalypso DUART28C adapters.
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
4 */
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
5
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
6 #include <sys/types.h>
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
7 #include <sys/file.h>
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
8 #include <sys/ioctl.h>
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
9 #include <stdio.h>
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
10 #include <stdlib.h>
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
11 #include <unistd.h>
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
12
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
13 main(argc, argv)
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
14 char **argv;
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
15 {
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
16 int target_fd;
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
17 int mctl_arg = TIOCM_DTR;
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
18
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
19 if (argc != 2) {
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
20 fprintf(stderr, "usage: %s ttyname\n", argv[0]);
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
21 exit(1);
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
22 }
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
23 target_fd = open(argv[1], O_RDWR|O_NONBLOCK);
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
24 if (target_fd < 0) {
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
25 perror(argv[1]);
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
26 exit(1);
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
27 }
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
28 ioctl(target_fd, TIOCMBIS, &mctl_arg);
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
29 usleep(50000);
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
30 ioctl(target_fd, TIOCMBIC, &mctl_arg);
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
31 exit(0);
5b8287c655cf fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
32 }