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annotate rvinterf/old/before-rvinterf/openport.c @ 1014:961efadd530a default tip

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fc-shell TCH DL handler: add support for CSD modes TCH DL capture mechanism in FC Tourmaline firmware has been extended to support CSD modes in addition to speech - add the necessary support on the host tools side. It needs to be noted that this mechanism in its present state does NOT provide the debug utility value that was sought: as we learned only after the code was implemented, TI's DSP has a misfeature in that the buffer we are reading (a_dd_0[]) is zeroed out when the IDS block is enabled, i.e., we are reading all zeros and not the real DL bits we were after. But since the code has already been written, we are keeping it - perhaps we can do some tests with IDS disabled.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 26 Nov 2024 06:27:43 +0000
parents e7502631a0f9
children
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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 }