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/* MSPDebug - debugging tool for the eZ430
* Copyright (C) 2009, 2010 Daniel Beer
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "ihex.h"
#include "output.h"
int ihex_check(FILE *in)
{
rewind(in);
return fgetc(in) == ':';
}
static int feed_line(uint8_t *data, int nbytes, binfile_imgcb_t cb,
void *user_data, address_t *segment_offset)
{
uint8_t cksum = 0;
address_t address;
uint8_t type;
uint8_t *payload;
int data_len;
int i;
struct binfile_chunk ch = {0};
if (nbytes < 5)
return 0;
/* Verify checksum */
for (i = 0; i + 1 < nbytes; i++)
cksum += data[i];
cksum = ~(cksum - 1) & 0xff;
if (data[nbytes - 1] != cksum) {
printc_err("ihex: invalid checksum: %02x "
"(calculated %02x)\n", data[nbytes - 1], cksum);
return -1;
}
/* Extract other bits */
type = data[3];
address = (data[1] << 8) | data[2];
payload = data + 4;
data_len = nbytes - 5;
switch (type) {
case 0:
ch.addr = address + *segment_offset;
ch.data = payload;
ch.len = data_len;
return cb(user_data, &ch);
case 1:
case 3:
/* These can be safely ignored */
break;
case 2:
if (data_len != 2) {
printc_err("ihex: invalid 02 record\n");
return -1;
}
*segment_offset = (address_t)((payload[0] << 8) |
payload[1]) << 4;
break;
case 4:
if (data_len != 2) {
printc_err("ihex: invalid 04 record\n");
return -1;
}
*segment_offset = (address_t)((payload[0] << 8) |
payload[1]) << 16;
break;
default:
printc_err("warning: ihex: unknown record type: "
"0x%02x\n", type);
break;
}
return 0;
}
int ihex_extract(FILE *in, binfile_imgcb_t cb, void *user_data)
{
char buf[128];
int lno = 0;
address_t segment_offset = 0;
rewind(in);
while (fgets(buf, sizeof(buf), in)) {
int len = strlen(buf);
int i;
uint8_t data[64];
int nbytes;
lno++;
if (buf[0] != ':') {
printc_err("ihex: line %d: invalid start "
"marker\n", lno);
continue;
}
/* Trim trailing whitespace */
while (len && isspace(buf[len - 1]))
len--;
buf[len] = 0;
/* Decode hex digits */
nbytes = (len - 1) / 2;
for (i = 0; i < nbytes; i++) {
char d[] = {buf[i * 2 + 1], buf[i * 2 + 2], 0};
data[i] = strtoul(d, NULL, 16);
}
/* Handle the line */
if (feed_line(data, nbytes, cb, user_data,
&segment_offset) < 0) {
printc_err("ihex: error on line %d\n", lno);
return -1;
}
}
return 0;
}
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