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annotate loadtools/tpinterf2.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 8d7dcfd9df53
children
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1 /*
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2 * This module provides a more advanced target interface function
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3 * than tpinterf.c - programmatic capture of target responses.
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4 * It is linked by some of our programs, but not all.
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5 */
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6
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7 #include <sys/types.h>
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8 #include <sys/time.h>
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9 #include <sys/errno.h>
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10 #include <stdio.h>
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11 #include <string.h>
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12 #include <strings.h>
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13 #include <stdlib.h>
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14 #include <unistd.h>
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16 extern int errno;
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17
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18 extern int target_fd;
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19
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20 /*
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21 * This functions reads the serial output from the target until a
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22 * '=' prompt is received. All intermediate output is parsed into
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23 * lines and passed to a callback function.
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24 *
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25 * The callback function is called with a pointer to each received
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26 * line, stored in a buffer ending in NUL, with CRLF stripped.
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27 * The callback function is expected to return an int. If the
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28 * callback return value is negative, this function returns immediately
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29 * with that negative value. If the callback return value is positive
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30 * or zero, it is added to an accumulator.
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31 *
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32 * Termination: this function returns when it has received a '=' at
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33 * the beginning of a line (return value is the callback return
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34 * accumulator, or 0 if no lines came), if the callback returns a
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35 * negative value (that value is returned), or if an error is detected
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36 * within this function (return value -1, and an error message
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37 * printed on stderr).
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38 */
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39 tpinterf_capture_output(timeout, callback)
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40 int timeout; /* seconds */
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41 int (*callback)();
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42 {
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43 char buf[512], *cp;
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44 char line[1024], *dp = line;
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45 fd_set fds;
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46 struct timeval tv;
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47 int cc, linelen = 0;
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48 int totout = 0, cbret;
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49
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50 for (;;) {
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51 FD_ZERO(&fds);
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52 FD_SET(target_fd, &fds);
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53 tv.tv_sec = timeout;
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54 tv.tv_usec = 0;
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55 cc = select(target_fd+1, &fds, NULL, NULL, &tv);
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56 if (cc < 0) {
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57 if (errno == EINTR)
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58 continue;
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59 perror("select");
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60 return(-1);
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61 }
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62 if (cc < 1) {
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63 fprintf(stderr,
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64 "error: timeout waiting for \'=\' prompt from target\n");
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65 return(-1);
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66 }
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67 cc = read(target_fd, buf, sizeof buf);
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68 if (cc <= 0) {
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69 perror("read after successful select");
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70 return(-1);
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71 }
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72 for (cp = buf; cc; cp++) {
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73 cc--;
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74 if (*cp == '=' && !linelen && !cc)
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75 return(totout);
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76 if (*cp == '\r')
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77 continue;
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78 if (*cp == '\n') {
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79 *dp = '\0';
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80 cbret = callback(line);
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81 if (cbret < 0)
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82 return(cbret);
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83 totout += cbret;
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84 dp = line;
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85 linelen = 0;
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86 continue;
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87 }
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88 *dp++ = *cp;
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89 linelen++;
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90 if (linelen >= sizeof line) {
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91 fprintf(stderr,
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92 "error: target response line length exceeds buffer\n");
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93 return(-1);
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94 }
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95 }
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96 }
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97 }
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98
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99 /* single line response capture mechanism */
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100 /* same line buffer size as in tpinterf_capture_output() */
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101 char target_response_line[1024];
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102
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103 static
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104 oneline_catcher(linein)
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105 char *linein;
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106 {
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107 strcpy(target_response_line, linein);
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108 return(1);
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109 }
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110
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111 tpinterf_capture_output_oneline(timeout)
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112 {
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113 return tpinterf_capture_output(timeout, oneline_catcher);
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114 }