FreeCalypso > hg > freecalypso-reveng
view miscprog/pircksum.c @ 362:b4fb0c7dfdf4
fluid-mnf: added -oC option to use cmd39.m0 for Calypso C05
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 14 Mar 2020 19:44:44 +0000 |
parents | bf4286245c74 |
children |
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/* * This program has been used to verify and refine my understanding of the * checksum scheme used for Pirelli's RF calibration data. */ #include <sys/types.h> #include <stdio.h> #include <stdlib.h> main(argc, argv) char **argv; { FILE *f; u_long offset, len; u_char inb, accum; if (argc != 4) { fprintf(stderr, "usage: %s fact.bin offset len\n", argv[0]); exit(1); } f = fopen(argv[1], "r"); if (!f) { perror(argv[1]); exit(1); } offset = strtoul(argv[2], 0, 16); len = strtoul(argv[3], 0, 16); fseek(f, offset, SEEK_SET); for (accum = 0; len; len--) { inb = getc(f); accum += inb; } inb = getc(f); printf("Computed cksum %02X, following byte %02X\n", accum, inb); exit(0); }