nes-proj/tools/sensinode/nano_programmer/ihex.c

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/*
NanoStack: MCU software and PC tools for IP-based wireless sensor networking.
Copyright (C) 2006-2007 Sensinode Ltd.
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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
Address:
Sensinode Ltd.
Teknologiantie 6
90570 Oulu, Finland
E-mail:
info@sensinode.com
*/
#include <unistd.h>
#include <strings.h>
#include <stdio.h>
#include <string.h>
#include <inttypes.h>
int hexfile_parse(char *line, unsigned int *type, unsigned int *addr, unsigned char *buffer)
{
unsigned int row_len = 0;
unsigned int row_index = 7;
unsigned int i;
int tmp;
uint8_t cksum = 0;
int retval = 0;
retval = sscanf(line, ":%2x%4x%2x", &row_len, addr, type);
cksum += row_len;
cksum += *addr >> 8;
cksum += *addr & 0xFF;
cksum += *type;
i = 0;
if (retval == 3)
{
while(i < row_len)
{
if (sscanf(&line[row_index], "%2x", &tmp) == 1)
{
cksum += tmp;
buffer[i++] = (unsigned char) tmp;
row_index += 2;
}
else return -1;
}
if (sscanf(&line[row_index], "%2x", &tmp) == 1)
{
if ((cksum + (uint8_t) tmp) == 0) return row_len;
}
}
return -1;
}
int hexfile_out(char *line, unsigned int type, unsigned int address, unsigned char *data, unsigned int bytes)
{
uint8_t cksum = 0;
uint8_t i = 0;
char tmp[8];
sprintf(line, ":%2.2X%4.4X%2.2X", bytes, address, type);
cksum -= bytes;
cksum -= address >> 8;
cksum -= address & 0xFF;
cksum -= type;
for (i=0; i<bytes; i++)
{
sprintf(tmp, "%2.2X", data[i]);
strcat(line, tmp);
cksum -= data[i];
}
sprintf(tmp, "%2.2X\r\n", cksum);
strcat(line, tmp);
return strlen(line);
}