FreeCalypso > hg > freecalypso-tools
annotate miscutil/fc-pulse-rts.c @ 837:724a6bc2a4b8
CHANGES: document tiaud-compile & tiaud-decomp extension
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 30 Jul 2021 01:37:42 +0000 |
parents | 5b8287c655cf |
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fc-pulse-dtr and fc-pulse-rts utilities implemented
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1 /* |
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fc-pulse-dtr and fc-pulse-rts utilities implemented
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2 * This utility opens a serial port, asserts RTS for 50 ms, then negates it |
5b8287c655cf
fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
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3 * and exits. It is intended for use with FreeCalypso DUART28C adapters. |
5b8287c655cf
fc-pulse-dtr and fc-pulse-rts utilities implemented
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4 */ |
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5 |
5b8287c655cf
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6 #include <sys/types.h> |
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7 #include <sys/file.h> |
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8 #include <sys/ioctl.h> |
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9 #include <stdio.h> |
5b8287c655cf
fc-pulse-dtr and fc-pulse-rts utilities implemented
Mychaela Falconia <falcon@freecalypso.org>
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10 #include <stdlib.h> |
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Mychaela Falconia <falcon@freecalypso.org>
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11 #include <unistd.h> |
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12 |
5b8287c655cf
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13 main(argc, argv) |
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14 char **argv; |
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15 { |
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16 int target_fd; |
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fc-pulse-dtr and fc-pulse-rts utilities implemented
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17 int mctl_arg = TIOCM_RTS; |
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18 |
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Mychaela Falconia <falcon@freecalypso.org>
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19 if (argc != 2) { |
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20 fprintf(stderr, "usage: %s ttyname\n", argv[0]); |
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21 exit(1); |
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fc-pulse-dtr and fc-pulse-rts utilities implemented
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22 } |
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23 target_fd = open(argv[1], O_RDWR|O_NONBLOCK); |
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24 if (target_fd < 0) { |
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25 perror(argv[1]); |
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26 exit(1); |
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27 } |
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28 ioctl(target_fd, TIOCMBIS, &mctl_arg); |
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29 usleep(50000); |
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30 ioctl(target_fd, TIOCMBIC, &mctl_arg); |
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31 exit(0); |
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32 } |