FreeCalypso > hg > freecalypso-tools
view loadtools/srecreader.c @ 416:30f6d1c32c6f
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 |
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/* * This module contains the functions for reading S-record files. */ #include <sys/types.h> #include <stdint.h> #include <stdio.h> #include <ctype.h> #include <strings.h> #include "srecreader.h" open_srec_file(sr) struct srecreader *sr; { sr->openfile = fopen(sr->filename, "r"); if (!sr->openfile) { perror(sr->filename); return(-1); } sr->lineno = 0; return(0); } static srec2bin(sr, asciiline) struct srecreader *sr; char *asciiline; { register int i, l, b; l = decode_hex_byte(asciiline + 2); if (l < 1) { fprintf(stderr, "%s line %d: S-record length octet is bad\n", sr->filename, sr->lineno); return(-1); } sr->record[0] = l; for (i = 1; i <= l; i++) { b = decode_hex_byte(asciiline + i*2 + 2); if (b < 0) { fprintf(stderr, "%s line %d: S-record hex decode error\n", sr->filename, sr->lineno); return(-1); } sr->record[i] = b; } return(0); } static srec_cksum(sr) struct srecreader *sr; { u_char accum; register int i, len; len = sr->record[0] + 1; accum = 0; for (i = 0; i < len; i++) accum += sr->record[i]; if (accum != 0xFF) { fprintf(stderr, "%s line %d: bad S-record checksum\n", sr->filename, sr->lineno); return(-1); } return(0); } read_s_record(sr) struct srecreader *sr; { char asciiline[1024]; if (!fgets(asciiline, sizeof asciiline, sr->openfile)) { fprintf(stderr, "%s: premature EOF after %d S-records\n", sr->filename, sr->lineno); return(-1); } sr->lineno++; if (asciiline[0] != 'S' || !isdigit(asciiline[1])) { fprintf(stderr, "%s line %d: S-record expected\n", sr->filename, sr->lineno); return(-1); } sr->record_type = asciiline[1]; if (srec2bin(sr, asciiline) < 0) return(-1); return srec_cksum(sr); } s3s7_get_addr_data(sr) struct srecreader *sr; { if (sr->record[0] < 5) { fprintf(stderr, "%s line %d: S%c record is too short\n", sr->filename, sr->lineno, sr->record_type); return(-1); } sr->datalen = sr->record[0] - 5; sr->addr = ((uint32_t)sr->record[1] << 24) | ((uint32_t)sr->record[2] << 16) | ((uint32_t)sr->record[3] << 8) | (uint32_t)sr->record[4]; return(0); }