134 lines
2.8 KiB
C
134 lines
2.8 KiB
C
/* MSPDebug - debugging tool for MSP430 MCUs
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* Copyright (C) 2009, 2010 Daniel Beer
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <ctype.h>
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#include <stdlib.h>
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#include "srec.h"
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#include "util.h"
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#include "output.h"
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int srec_check(FILE *in)
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{
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char buf[128];
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int i;
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rewind(in);
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if (!fgets(buf, sizeof(buf), in))
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return 0;
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if (buf[0] != 'S')
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return 0;
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for (i = 1; buf[i] && !isspace(buf[i]); i++)
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if (!ishex(buf[i]))
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return 0;
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for (; buf[i]; i++)
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if (!isspace(buf[i]))
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return 0;
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return 1;
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}
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int srec_extract(FILE *in, binfile_imgcb_t cb, void *user_data)
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{
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char buf[128];
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int lno = 0;
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rewind(in);
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while (fgets(buf, sizeof(buf), in)) {
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uint8_t bytes[128];
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uint8_t cksum = 0;
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int count = 0;
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int i;
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lno++;
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if (buf[0] != 'S') {
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printc_err("srec: garbage on line %d\n", lno);
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return -1;
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}
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for (i = 2; ishex(buf[i]) && ishex(buf[i + 1]); i += 2) {
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if (count >= sizeof(bytes)) {
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printc_err("srec: too many bytes on "
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"line %d\n", lno);
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return -1;
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}
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bytes[count++] = (hexval(buf[i]) << 4) |
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hexval(buf[i + 1]);
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}
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while (buf[i]) {
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if (!isspace(buf[i])) {
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printc_err("srec: trailing garbage on "
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"line %d\n", lno);
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return -1;
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}
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i++;
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}
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if (count < 2) {
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printc_err("srec: too few bytes on line %d\n",
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lno);
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return -1;
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}
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if (bytes[0] + 1 != count) {
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printc_err("srec: byte count mismatch on "
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"line %d\n", lno);
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return -1;
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}
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for (i = 0; i + 1 < count; i++)
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cksum += bytes[i];
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cksum = ~cksum;
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if (cksum != bytes[count - 1]) {
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printc_err("srec: checksum error on line %d "
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"(calc = 0x%02x, read = 0x%02x)\n",
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lno, cksum, bytes[count - 1]);
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return -1;
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}
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if (buf[1] >= '1' && buf[1] <= '3') {
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int addrbytes = buf[1] - '1' + 2;
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address_t addr = 0;
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for (i = 0; i < addrbytes; i++)
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addr = (addr << 8) | bytes[i + 1];
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if (count < addrbytes + 2) {
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printc_err("srec: too few address bytes "
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"on line %d\n", lno);
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return -1;
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}
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if (cb(user_data, addr, bytes + addrbytes + 1,
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count - 2 - addrbytes) < 0) {
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printc_err("srec: error on line %d\n",
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lno);
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return -1;
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}
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}
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}
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return 0;
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}
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