FreeCalypso > hg > freecalypso-tools
annotate rvinterf/lowlevel/openport.c @ 41:2c9ea966edb9
target-utils/{compalstage,loadagent}/Makefile: move to /opt/freecalypso
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 26 Oct 2016 05:32:42 +0000 |
parents | e7502631a0f9 |
children | e7d5ce499693 |
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1 /* |
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2 * This module takes care of opening the serial port and setting the |
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3 * proper "raw" termios modes, including the baud rate. |
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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 |
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16 int target_fd; |
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17 char *baudrate_name = "115200"; |
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18 |
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19 static struct baudrate { |
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20 char *name; |
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21 speed_t termios_code; |
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22 } baud_rate_table[] = { |
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23 {"19200", B19200}, |
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24 {"38400", B38400}, |
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25 {"57600", B57600}, |
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26 {"115200", B115200}, |
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27 /* non-standard high baud rates "remapped" by CP2102 usb2serial IC */ |
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28 {"203125", B230400}, |
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29 {"406250", B460800}, |
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30 {"812500", B921600}, |
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31 /* table search terminator */ |
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32 {NULL, B0} |
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33 }; |
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34 |
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35 static speed_t |
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36 get_baud_rate() |
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37 { |
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38 struct baudrate *br; |
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39 |
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40 for (br = baud_rate_table; br->name; br++) |
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41 if (!strcmp(br->name, baudrate_name)) |
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42 break; |
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43 if (!br->name) { |
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44 fprintf(stderr, "baud rate \"%s\" unknown/unsupported\n", |
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45 baudrate_name); |
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46 exit(1); |
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47 } |
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48 return br->termios_code; |
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49 } |
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50 |
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51 open_target_serial(ttydev) |
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52 char *ttydev; |
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53 { |
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54 struct termios target_termios; |
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55 speed_t br_code; |
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56 |
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57 br_code = get_baud_rate(); |
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58 target_fd = open(ttydev, O_RDWR|O_NONBLOCK); |
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59 if (target_fd < 0) { |
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60 perror(ttydev); |
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61 exit(1); |
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62 } |
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63 target_termios.c_iflag = IGNBRK; |
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64 target_termios.c_oflag = 0; |
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65 target_termios.c_cflag = CLOCAL|HUPCL|CREAD|CS8; |
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66 target_termios.c_lflag = 0; |
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67 target_termios.c_cc[VMIN] = 1; |
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68 target_termios.c_cc[VTIME] = 0; |
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69 cfsetispeed(&target_termios, br_code); |
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70 cfsetospeed(&target_termios, br_code); |
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71 if (tcsetattr(target_fd, TCSAFLUSH, &target_termios) < 0) { |
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72 perror("initial tcsetattr on target"); |
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73 exit(1); |
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74 } |
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75 return 0; |
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76 } |
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77 |
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78 set_serial_nonblock(state) |
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79 int state; |
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80 { |
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81 ioctl(target_fd, FIONBIO, &state); |
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82 } |