FreeCalypso > hg > freecalypso-tools

annotate loadtools/tpinterf2.c @ 416:30f6d1c32c6f

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doc/Flash-boot-defect article removed (no longer relevant) This article is no longer relevant because the issue in question only affected one (1) defective FCDEV3B board which was not and never will be sold.
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 26 Oct 2018 07:11:08 +0000
parents e7502631a0f9
children 8d7dcfd9df53
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Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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Mychaela Falconia <falcon@freecalypso.org>
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2 * This module provides a more advanced target interface function
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Mychaela Falconia <falcon@freecalypso.org>
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3 * than tpinterf.c - programmatic capture of target responses,
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Mychaela Falconia <falcon@freecalypso.org>
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4 * for dumps etc. It will be linked by fc-loadtool, but not fc-chainload.
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Mychaela Falconia <falcon@freecalypso.org>
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5 */
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6
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Mychaela Falconia <falcon@freecalypso.org>
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7 #include <sys/types.h>
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Mychaela Falconia <falcon@freecalypso.org>
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8 #include <sys/time.h>
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Mychaela Falconia <falcon@freecalypso.org>
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9 #include <sys/errno.h>
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Mychaela Falconia <falcon@freecalypso.org>
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10 #include <stdio.h>
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Mychaela Falconia <falcon@freecalypso.org>
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11 #include <string.h>
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Mychaela Falconia <falcon@freecalypso.org>
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12 #include <strings.h>
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Mychaela Falconia <falcon@freecalypso.org>
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13 #include <stdlib.h>
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14
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15 extern int errno;
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16
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Mychaela Falconia <falcon@freecalypso.org>
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17 extern int target_fd;
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18
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19 /*
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Mychaela Falconia <falcon@freecalypso.org>
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20 * This functions reads the serial output from the target until a
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Mychaela Falconia <falcon@freecalypso.org>
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21 * '=' prompt is received. All intermediate output is parsed into
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Mychaela Falconia <falcon@freecalypso.org>
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22 * lines and passed to a callback function.
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Mychaela Falconia <falcon@freecalypso.org>
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23 *
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Mychaela Falconia <falcon@freecalypso.org>
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24 * The callback function is called with a pointer to each received
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Mychaela Falconia <falcon@freecalypso.org>
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25 * line, stored in a buffer ending in NUL, with CRLF stripped.
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Mychaela Falconia <falcon@freecalypso.org>
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26 * The callback function is expected to return an int. If the
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Mychaela Falconia <falcon@freecalypso.org>
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27 * callback return value is negative, this function returns immediately
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Mychaela Falconia <falcon@freecalypso.org>
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28 * with that negative value. If the callback return value is positive
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Mychaela Falconia <falcon@freecalypso.org>
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29 * or zero, it is added to an accumulator.
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Mychaela Falconia <falcon@freecalypso.org>
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30 *
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Mychaela Falconia <falcon@freecalypso.org>
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31 * Termination: this function returns when it has received a '=' at
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Mychaela Falconia <falcon@freecalypso.org>
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32 * the beginning of a line (return value is the callback return
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Mychaela Falconia <falcon@freecalypso.org>
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33 * accumulator, or 0 if no lines came), if the callback returns a
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Mychaela Falconia <falcon@freecalypso.org>
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34 * negative value (that value is returned), or if an error is detected
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Mychaela Falconia <falcon@freecalypso.org>
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35 * within this function (return value -1, and an error message
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Mychaela Falconia <falcon@freecalypso.org>
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36 * printed on stderr).
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37 */
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Mychaela Falconia <falcon@freecalypso.org>
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38 tpinterf_capture_output(timeout, callback)
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Mychaela Falconia <falcon@freecalypso.org>
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39 int timeout; /* seconds */
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Mychaela Falconia <falcon@freecalypso.org>
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40 int (*callback)();
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41 {
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Mychaela Falconia <falcon@freecalypso.org>
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42 char buf[512], *cp;
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Mychaela Falconia <falcon@freecalypso.org>
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43 char line[1024], *dp = line;
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Mychaela Falconia <falcon@freecalypso.org>
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44 fd_set fds;
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Mychaela Falconia <falcon@freecalypso.org>
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45 struct timeval tv;
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Mychaela Falconia <falcon@freecalypso.org>
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46 int cc, linelen = 0;
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Mychaela Falconia <falcon@freecalypso.org>
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47 int totout = 0, cbret;
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48
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49 for (;;) {
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Mychaela Falconia <falcon@freecalypso.org>
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50 FD_ZERO(&fds);
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51 FD_SET(target_fd, &fds);
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52 tv.tv_sec = timeout;
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53 tv.tv_usec = 0;
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54 cc = select(target_fd+1, &fds, NULL, NULL, &tv);
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55 if (cc < 0) {
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56 if (errno == EINTR)
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57 continue;
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58 perror("select");
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59 return(-1);
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60 }
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61 if (cc < 1) {
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62 fprintf(stderr,
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63 "error: timeout waiting for \'=\' prompt from target\n");
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64 return(-1);
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65 }
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Mychaela Falconia <falcon@freecalypso.org>
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66 cc = read(target_fd, buf, sizeof buf);
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67 if (cc <= 0) {
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68 perror("read after successful select");
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69 return(-1);
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70 }
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71 for (cp = buf; cc; cp++) {
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72 cc--;
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73 if (*cp == '=' && !linelen && !cc)
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74 return(totout);
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75 if (*cp == '\r')
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76 continue;
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77 if (*cp == '\n') {
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78 *dp = '\0';
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79 cbret = callback(line);
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80 if (cbret < 0)
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81 return(cbret);
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82 totout += cbret;
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83 dp = line;
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84 linelen = 0;
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85 continue;
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86 }
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87 *dp++ = *cp;
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Mychaela Falconia <falcon@freecalypso.org>
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88 linelen++;
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Mychaela Falconia <falcon@freecalypso.org>
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89 if (linelen >= sizeof line) {
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Mychaela Falconia <falcon@freecalypso.org>
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90 fprintf(stderr,
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Mychaela Falconia <falcon@freecalypso.org>
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91 "error: target response line length exceeds buffer\n");
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Mychaela Falconia <falcon@freecalypso.org>
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92 return(-1);
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93 }
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Mychaela Falconia <falcon@freecalypso.org>
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94 }
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Mychaela Falconia <falcon@freecalypso.org>
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95 }
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Mychaela Falconia <falcon@freecalypso.org>
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96 }
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Mychaela Falconia <falcon@freecalypso.org>
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97
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Mychaela Falconia <falcon@freecalypso.org>
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98 /* single line response capture mechanism */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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99 /* same line buffer size as in tpinterf_capture_output() */
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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100 char target_response_line[1024];
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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101
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Mychaela Falconia <falcon@freecalypso.org>
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102 static
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Mychaela Falconia <falcon@freecalypso.org>
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103 oneline_catcher(linein)
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Mychaela Falconia <falcon@freecalypso.org>
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104 char *linein;
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Mychaela Falconia <falcon@freecalypso.org>
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105 {
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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106 strcpy(target_response_line, linein);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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107 return(1);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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108 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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109
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Mychaela Falconia <falcon@freecalypso.org>
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110 tpinterf_capture_output_oneline(timeout)
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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111 {
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Mychaela Falconia <falcon@freecalypso.org>
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112 return tpinterf_capture_output(timeout, oneline_catcher);
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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113 }