20070918/experiments/hex_to_bin.c

/*
 *  $Id: hex_to_bin.c,v 1.2 2007/05/11 07:51:56 debug Exp $
 *
 *  Quick hack to convert .hex files (such as the AVR Hello World program at
 *  http://www.tfs.net/~petek/atmel/hiworld/hiworld.hex) into raw binaries.
 *
 *  E.g.  hex_to_bin hiworld.hex hiworld.bin
 *
 *  and then:   gxemul -E bareavr .....  0:hiworld.bin
 *
 *  Note: The experimental AVR emulation was removed from GXemul at 20070511.
 *        Use versions prior to this versions if you want to play with AVR
 *        emulation.
 */

#include <stdio.h>


int fromhex(char *p)
{
        char c1 = p[0], c2 = p[1];
        if (c1 >= '0' && c1 <= '9')
                c1 -= '0';
        else if (c1 >= 'A' && c1 <= 'F')
                c1 = c1 - 'A' + 10;
        if (c2 >= '0' && c2 <= '9')
                c2 -= '0';
        else if (c2 >= 'A' && c2 <= 'F')
                c2 = c2 - 'A' + 10;
        return c1 * 16 + c2;
}


int hex_to_bin(char *fname, char *outname)
{
        FILE *f = fopen(fname, "r");
        FILE *fout = fopen(outname, "w");

        while (!feof(f)) {
                char s[80];
                int nbytes, i, addr;

                s[0] = '\0';
                fgets(s, sizeof(s), f);
                if (s[0] == 0)
                        break;
                if (s[0] != ':')
                        continue;
                nbytes = fromhex(s+1);
                addr = fromhex(s+3) * 256 + fromhex(s+5);
                fseek(fout, addr, SEEK_SET);
                for (i=0; i<nbytes; i++) {
                        unsigned char b = fromhex(s+9+i*2);
                        fwrite(&b, 1, 1, fout);
                }
        }

        fclose(fout);
        fclose(f);
        return 0;
}


int main(int argc, char *argv[])
{
        if (argc < 3) {
                fprintf(stderr, "usage: %s file.hex output.bin\n", argv[0]);
                exit(1);
        }

        return hex_to_bin(argv[1], argv[2]);
}

1	/*
2	* $Id: hex_to_bin.c,v 1.2 2007/05/11 07:51:56 debug Exp $
3	*
4	* Quick hack to convert .hex files (such as the AVR Hello World program at
5	* http://www.tfs.net/~petek/atmel/hiworld/hiworld.hex) into raw binaries.
6	*
7	* E.g. hex_to_bin hiworld.hex hiworld.bin
8	*
9	* and then: gxemul -E bareavr ..... 0:hiworld.bin
10	*
11	* Note: The experimental AVR emulation was removed from GXemul at 20070511.
12	* Use versions prior to this versions if you want to play with AVR
13	* emulation.
14	*/
15
16	#include <stdio.h>
17
18
19	int fromhex(char *p)
20	{
21	char c1 = p[0], c2 = p[1];
22	if (c1 >= '0' && c1 <= '9')
23	c1 -= '0';
24	else if (c1 >= 'A' && c1 <= 'F')
25	c1 = c1 - 'A' + 10;
26	if (c2 >= '0' && c2 <= '9')
27	c2 -= '0';
28	else if (c2 >= 'A' && c2 <= 'F')
29	c2 = c2 - 'A' + 10;
30	return c1 * 16 + c2;
31	}
32
33
34	int hex_to_bin(char fname, char outname)
35	{
36	FILE *f = fopen(fname, "r");
37	FILE *fout = fopen(outname, "w");
38
39	while (!feof(f)) {
40	char s[80];
41	int nbytes, i, addr;
42
43	s[0] = '\0';
44	fgets(s, sizeof(s), f);
45	if (s[0] == 0)
46	break;
47	if (s[0] != ':')
48	continue;
49	nbytes = fromhex(s+1);
50	addr = fromhex(s+3) * 256 + fromhex(s+5);
51	fseek(fout, addr, SEEK_SET);
52	for (i=0; i<nbytes; i++) {
53	unsigned char b = fromhex(s+9+i*2);
54	fwrite(&b, 1, 1, fout);
55	}
56	}
57
58	fclose(fout);
59	fclose(f);
60	return 0;
61	}
62
63
64	int main(int argc, char *argv[])
65	{
66	if (argc < 3) {
67	fprintf(stderr, "usage: %s file.hex output.bin\n", argv[0]);
68	exit(1);
69	}
70
71	return hex_to_bin(argv[1], argv[2]);
72	}
73