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annotate libpwon/duart28c.c @ 926:6a0aa8d36d06

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rvinterf backslash escape: introduce libprint The new helper function library named libprint is meant to replace the badly misnamed libg23, and will soon contain functions for printing all of the same kinds of GPF TST packets that are now handled in libg23. However, we are also moving safe_print_trace() from libasync to this new library, and changing it to emit our new backslash escape format.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 23 May 2023 03:47:46 +0000
parents 7d1df6d831e4
children
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7d1df6d831e4 libpwon: added -Pdtr and -Prts support for DUART28C
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1 #include <sys/types.h>
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2 #include <sys/ioctl.h>
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3 #include <stdio.h>
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4 #include <stdlib.h>
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5 #include <string.h>
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6 #include <strings.h>
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7 #include <unistd.h>
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8
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9 extern int target_fd;
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10
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11 int bootctrl_duart28c_mode;
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12 static int mctl_arg;
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13
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14 bootctrl_check_duart28c(bc_name)
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15 char *bc_name;
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16 {
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17 if (!strcmp(bc_name, "dtr")) {
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18 bootctrl_duart28c_mode = 1;
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19 mctl_arg = TIOCM_DTR;
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20 return 1;
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21 }
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22 if (!strcmp(bc_name, "rts")) {
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23 bootctrl_duart28c_mode = 1;
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24 mctl_arg = TIOCM_RTS;
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25 return 1;
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26 }
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27 return 0;
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28 }
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29
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30 void
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31 fork_duart28c_pulse()
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32 {
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33 int i;
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34
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35 i = fork();
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36 if (i < 0) {
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37 perror("fork");
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38 exit(1);
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39 }
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40 if (i)
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41 return;
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42 ioctl(target_fd, TIOCMBIS, &mctl_arg);
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43 usleep(50000);
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44 ioctl(target_fd, TIOCMBIC, &mctl_arg);
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45 exit(0);
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46 }