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annotate loadtools/srecreader.c @ 504:7b2ceea92a2e

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osx.c: osx_alloc_prim() done
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Tue, 01 Jul 2014 19:08:20 +0000
parents fea204bc7674
children
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1 /*
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2 * This module contains the functions for reading S-record files.
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3 */
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4
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5 #include <sys/types.h>
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6 #include <stdint.h>
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7 #include <stdio.h>
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8 #include <ctype.h>
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9 #include <strings.h>
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10 #include "srecreader.h"
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11
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12 open_srec_file(sr)
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13 struct srecreader *sr;
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14 {
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15 sr->openfile = fopen(sr->filename, "r");
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16 if (!sr->openfile) {
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17 perror(sr->filename);
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18 return(-1);
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19 }
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20 sr->lineno = 0;
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21 return(0);
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22 }
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23
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24 static
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25 srec2bin(sr, asciiline)
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26 struct srecreader *sr;
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27 char *asciiline;
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28 {
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29 register int i, l, b;
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30
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31 l = decode_hex_byte(asciiline + 2);
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32 if (l < 1) {
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33 fprintf(stderr, "%s line %d: S-record length octet is bad\n",
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34 sr->filename, sr->lineno);
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35 return(-1);
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36 }
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37 sr->record[0] = l;
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38 for (i = 1; i <= l; i++) {
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39 b = decode_hex_byte(asciiline + i*2 + 2);
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40 if (b < 0) {
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41 fprintf(stderr,
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42 "%s line %d: S-record hex decode error\n",
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43 sr->filename, sr->lineno);
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44 return(-1);
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45 }
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46 sr->record[i] = b;
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47 }
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48 return(0);
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49 }
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50
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51 static
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52 srec_cksum(sr)
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53 struct srecreader *sr;
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54 {
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55 u_char accum;
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56 register int i, len;
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57
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58 len = sr->record[0] + 1;
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59 accum = 0;
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60 for (i = 0; i < len; i++)
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61 accum += sr->record[i];
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62 if (accum != 0xFF) {
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63 fprintf(stderr, "%s line %d: bad S-record checksum\n",
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64 sr->filename, sr->lineno);
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65 return(-1);
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66 }
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67 return(0);
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68 }
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69
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70 read_s_record(sr)
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71 struct srecreader *sr;
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72 {
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73 char asciiline[1024];
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74
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75 if (!fgets(asciiline, sizeof asciiline, sr->openfile)) {
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76 fprintf(stderr, "%s: premature EOF after %d S-records\n",
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77 sr->filename, sr->lineno);
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78 return(-1);
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79 }
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80 sr->lineno++;
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81 if (asciiline[0] != 'S' || !isdigit(asciiline[1])) {
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82 fprintf(stderr, "%s line %d: S-record expected\n",
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83 sr->filename, sr->lineno);
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84 return(-1);
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85 }
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86 sr->record_type = asciiline[1];
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87 if (srec2bin(sr, asciiline) < 0)
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88 return(-1);
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89 return srec_cksum(sr);
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90 }
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91
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92 s3s7_get_addr_data(sr)
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93 struct srecreader *sr;
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94 {
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95 if (sr->record[0] < 5) {
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96 fprintf(stderr, "%s line %d: S%c record is too short\n",
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97 sr->filename, sr->lineno, sr->record_type);
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98 return(-1);
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99 }
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100 sr->datalen = sr->record[0] - 5;
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101 sr->addr = ((uint32_t)sr->record[1] << 24) |
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102 ((uint32_t)sr->record[2] << 16) |
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103 ((uint32_t)sr->record[3] << 8) |
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104 (uint32_t)sr->record[4];
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105 return(0);
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106 }