FreeCalypso > hg > freecalypso-tools

annotate miscutil/openport.c @ 248:cb1ba53a1106

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beginning of factored-out libserial
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 21 Sep 2017 21:43:34 +0000
parents e7502631a0f9
children
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1 /*
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2 * Serial port opening code for fc-serterm
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3 */
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4
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5 #include <sys/types.h>
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6 #include <sys/file.h>
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7 #include <sys/ioctl.h>
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8 #include <termios.h>
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9 #include <stdio.h>
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10 #include <stdlib.h>
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11 #include <string.h>
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12 #include <strings.h>
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13 #include <unistd.h>
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14
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15 extern int target_fd;
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16
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17 static struct baudrate {
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18 char *name;
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19 speed_t termios_code;
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20 } baud_rate_table[] = {
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21 {"19200", B19200},
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22 {"38400", B38400},
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23 {"57600", B57600},
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24 {"115200", B115200},
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25 /* non-standard high baud rates "remapped" by CP2102 usb2serial IC */
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26 {"203125", B230400},
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27 {"406250", B460800},
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28 {"812500", B921600},
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29 /* table search terminator */
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30 {NULL, B0}
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31 };
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32
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33 open_target_serial(ttydev, baudname)
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34 char *ttydev, *baudname;
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35 {
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36 struct termios target_termios;
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37 struct baudrate *br;
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38
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39 for (br = baud_rate_table; br->name; br++)
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40 if (!strcmp(br->name, baudname))
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41 break;
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42 if (!br->name) {
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43 fprintf(stderr, "baud rate \"%s\" unknown/unsupported\n",
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44 baudname);
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45 exit(1);
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46 }
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47 target_fd = open(ttydev, O_RDWR|O_NONBLOCK);
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48 if (target_fd < 0) {
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49 perror(ttydev);
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50 exit(1);
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51 }
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52 target_termios.c_iflag = IGNBRK;
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53 target_termios.c_oflag = 0;
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54 target_termios.c_cflag = CLOCAL|HUPCL|CREAD|CS8;
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55 target_termios.c_lflag = 0;
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56 target_termios.c_cc[VMIN] = 1;
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57 target_termios.c_cc[VTIME] = 0;
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58 cfsetispeed(&target_termios, br->termios_code);
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59 cfsetospeed(&target_termios, br->termios_code);
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60 if (tcsetattr(target_fd, TCSAFLUSH, &target_termios) < 0) {
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61 perror("initial tcsetattr on target");
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62 exit(1);
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63 }
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64 return 0;
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65 }