FreeCalypso > hg > freecalypso-sw
annotate loadtools/sercomm.c @ 657:e40935b81113
ccddata compiles with cdginc-conservative; libccd.a built
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Thu, 25 Sep 2014 10:12:21 +0000 |
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1 /* |
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2 * This module handles the establishment of serial communication |
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3 * with the target, i.e., the host-side termios stuff. |
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4 */ |
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5 |
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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 <termios.h> |
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10 #include <stdio.h> |
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11 #include <stdlib.h> |
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12 #include <string.h> |
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13 #include <strings.h> |
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14 #include <unistd.h> |
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15 #include "baudrate.h" |
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16 |
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17 char *target_ttydev; |
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18 int target_fd; |
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19 struct termios target_termios; |
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20 |
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21 struct baudrate baud_rate_table[] = { |
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22 /* the first listed rate will be our default */ |
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23 {"115200", B115200, 0}, |
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24 {"57600", B57600, 1}, |
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25 {"38400", B38400, 2}, |
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26 {"19200", B19200, 4}, |
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27 /* non-standard high baud rates "remapped" by CP2102 usb2serial IC */ |
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28 {"812500", B921600, -1}, |
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29 {"406250", B460800, -1}, |
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30 {"203125", B230400, -1}, |
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31 /* table search terminator */ |
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32 {NULL, B0, -1}, |
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33 }; |
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34 struct baudrate *current_baud_rate; |
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35 |
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36 open_target_serial() |
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37 { |
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38 target_fd = open(target_ttydev, O_RDWR|O_NONBLOCK); |
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39 if (target_fd < 0) { |
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40 perror(target_ttydev); |
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41 exit(1); |
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42 } |
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43 target_termios.c_iflag = IGNBRK; |
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44 target_termios.c_oflag = 0; |
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45 target_termios.c_cflag = CLOCAL|HUPCL|CREAD|CS8; |
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46 target_termios.c_lflag = 0; |
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47 target_termios.c_cc[VMIN] = 1; |
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48 target_termios.c_cc[VTIME] = 0; |
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49 /* start at B19200, as that's what we'll need to use initially */ |
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50 cfsetispeed(&target_termios, B19200); |
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51 cfsetospeed(&target_termios, B19200); |
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52 if (tcsetattr(target_fd, TCSAFLUSH, &target_termios) < 0) { |
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53 perror("initial tcsetattr on target"); |
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54 exit(1); |
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55 } |
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56 return 0; |
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57 } |
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58 |
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59 struct baudrate * |
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60 find_baudrate_by_name(srch_name) |
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61 char *srch_name; |
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62 { |
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63 struct baudrate *br; |
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64 |
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65 for (br = baud_rate_table; br->name; br++) |
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66 if (!strcmp(br->name, srch_name)) |
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67 break; |
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68 if (br->name) |
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69 return(br); |
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70 else { |
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71 fprintf(stderr, "error: baud rate \"%s\" not known\n", |
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72 srch_name); |
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73 return(NULL); |
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74 } |
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75 } |
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76 |
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77 switch_baud_rate(br) |
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78 struct baudrate *br; |
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79 { |
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80 cfsetispeed(&target_termios, br->termios_code); |
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81 cfsetospeed(&target_termios, br->termios_code); |
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82 if (tcsetattr(target_fd, TCSAFLUSH, &target_termios) < 0) { |
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83 perror("tcsetattr to switch baud rate"); |
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84 exit(1); |
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85 } |
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86 current_baud_rate = br; |
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87 } |