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annotate cp2102/intel_hex_out.c @ 84:b36397a56bda

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doc/CP2102-EEPROM-format: small error in analysis
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 27 Sep 2023 18:38:10 +0000
parents 842cff427588
children
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d4d3531d342a cp2102-read-eeprom program written, compiles
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1 /*
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2 * This module implements a function for writing out the same Intel HEX
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3 * format as used by cp210x-program-1.0, the Python-language tool from 2014.
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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 <string.h>
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8 #include <strings.h>
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9 #include <stdio.h>
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10 #include <stdlib.h>
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11 #include "cp210x_defs.h"
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12
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13 void
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14 intel_hex_out(eeprom, outf)
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15 u_char *eeprom;
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16 FILE *outf;
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17 {
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18 unsigned linecnt, bytecnt;
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19 unsigned addr;
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20 u_char *sp;
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21 u_char record[21], *dp, csum;
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22
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23 sp = eeprom;
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24 addr = EEPROM_START_ADDR;
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25 for (linecnt = 0; linecnt < 64; linecnt++) {
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26 dp = record;
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27 *dp++ = 0x10;
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28 *dp++ = addr >> 8;
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29 *dp++ = addr;
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30 *dp++ = 0x00;
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31 for (bytecnt = 0; bytecnt < 16; bytecnt++)
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32 *dp++ = *sp++;
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33 csum = 0;
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34 for (bytecnt = 0; bytecnt < 20; bytecnt++)
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842cff427588 cp2102: fix Intel HEX read/write bugs
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35 csum += record[bytecnt];
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36 csum = 0x100 - csum;
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37 record[20] = csum;
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38 putc(':', outf);
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39 for (bytecnt = 0; bytecnt < 21; bytecnt++)
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40 fprintf(outf, "%02X", record[bytecnt]);
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41 putc('\n', outf);
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42 addr += 16;
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43 }
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44 fputs(":00000001FF\n", outf);
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45 }