nes-proj/cpu/cc2430/converter/ihex.c

71 lines
1.3 KiB
C
Raw Normal View History

#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);
}