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avrdude/fileio.c

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/*
* avrdude - A Downloader/Uploader for AVR device programmers
* Copyright (C) 2000, 2001, 2002, 2003 Brian S. Dean <bsd@bsdhome.com>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* $Id$ */
#include "ac_cfg.h"
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include "avr.h"
#include "fileio.h"
#define IHEX_MAXDATA 256
#define MAX_LINE_LEN 256 /* max line length for ASCII format input files */
struct ihexrec {
unsigned char reclen;
unsigned short loadofs;
unsigned char rectyp;
unsigned char data[IHEX_MAXDATA];
unsigned char cksum;
};
extern char * progname;
extern char progbuf[];
int b2ihex(unsigned char * inbuf, int bufsize,
int recsize, int startaddr,
char * outfile, FILE * outf);
int ihex2b(char * infile, FILE * inf,
unsigned char * outbuf, int bufsize);
int fileio_rbin(struct fioparms * fio,
char * filename, FILE * f, unsigned char * buf, int size);
int fileio_ihex(struct fioparms * fio,
char * filename, FILE * f, unsigned char * buf, int size);
int fileio_srec(struct fioparms * fio,
char * filename, FILE * f, unsigned char * buf, int size);
int fmt_autodetect(char * fname);
char * fmtstr(FILEFMT format)
{
switch (format) {
case FMT_AUTO : return "auto-detect"; break;
case FMT_SREC : return "Motorola S-Record"; break;
case FMT_IHEX : return "Intel Hex"; break;
case FMT_RBIN : return "raw binary"; break;
default : return "invalid format"; break;
};
}
int b2ihex(unsigned char * inbuf, int bufsize,
int recsize, int startaddr,
char * outfile, FILE * outf)
{
unsigned char * buf;
unsigned int nextaddr;
int n, nbytes, n_64k;
int i;
unsigned char cksum;
if (recsize > 255) {
fprintf(stderr, "%s: recsize=%d, must be < 256\n",
progname, recsize);
return -1;
}
n_64k = 0;
nextaddr = startaddr;
buf = inbuf;
nbytes = 0;
while (bufsize) {
n = recsize;
if (n > bufsize)
n = bufsize;
if ((nextaddr + n) > 0x10000)
n = 0x10000 - nextaddr;
if (n) {
cksum = 0;
fprintf(outf, ":%02X%04X00", n, nextaddr);
cksum += n + ((nextaddr >> 8) & 0x0ff) + (nextaddr & 0x0ff);
for (i=0; i<n; i++) {
fprintf(outf, "%02X", buf[i]);
cksum += buf[i];
}
cksum = -cksum;
fprintf(outf, "%02X\n", cksum);
nextaddr += n;
nbytes += n;
}
if (nextaddr >= 0x10000) {
int lo, hi;
/* output an extended address record */
n_64k++;
lo = n_64k & 0xff;
hi = (n_64k >> 8) & 0xff;
cksum = 0;
fprintf(outf, ":02000004%02X%02X", hi, lo);
cksum += 2 + 0 + 4 + hi + lo;
cksum = -cksum;
fprintf(outf, "%02X\n", cksum);
nextaddr = 0;
}
/* advance to next 'recsize' bytes */
buf += n;
bufsize -= n;
}
/*-----------------------------------------------------------------
add the end of record data line
-----------------------------------------------------------------*/
cksum = 0;
n = 0;
nextaddr = 0;
fprintf(outf, ":%02X%04X01", n, nextaddr);
cksum += n + ((nextaddr >> 8) & 0x0ff) + (nextaddr & 0x0ff) + 1;
cksum = -cksum;
fprintf(outf, "%02X\n", cksum);
return nbytes;
}
int ihex_readrec(struct ihexrec * ihex, char * rec)
{
int i, j;
char buf[8];
int offset, len;
char * e;
unsigned char cksum;
int rc;
len = strlen(rec);
offset = 1;
cksum = 0;
/* reclen */
if (offset + 2 > len)
return -1;
for (i=0; i<2; i++)
buf[i] = rec[offset++];
buf[i] = 0;
ihex->reclen = strtoul(buf, &e, 16);
if (e == buf || *e != 0)
return -1;
/* load offset */
if (offset + 4 > len)
return -1;
for (i=0; i<4; i++)
buf[i] = rec[offset++];
buf[i] = 0;
ihex->loadofs = strtoul(buf, &e, 16);
if (e == buf || *e != 0)
return -1;
/* record type */
if (offset + 2 > len)
return -1;
for (i=0; i<2; i++)
buf[i] = rec[offset++];
buf[i] = 0;
ihex->rectyp = strtoul(buf, &e, 16);
if (e == buf || *e != 0)
return -1;
cksum = ihex->reclen + ((ihex->loadofs >> 8) & 0x0ff) +
(ihex->loadofs & 0x0ff) + ihex->rectyp;
/* data */
for (j=0; j<ihex->reclen; j++) {
if (offset + 2 > len)
return -1;
for (i=0; i<2; i++)
buf[i] = rec[offset++];
buf[i] = 0;
ihex->data[j] = strtoul(buf, &e, 16);
if (e == buf || *e != 0)
return -1;
cksum += ihex->data[j];
}
/* cksum */
if (offset + 2 > len)
return -1;
for (i=0; i<2; i++)
buf[i] = rec[offset++];
buf[i] = 0;
ihex->cksum = strtoul(buf, &e, 16);
if (e == buf || *e != 0)
return -1;
rc = -cksum & 0x000000ff;
return rc;
}
/*
* Intel Hex to binary buffer
*
* Given an open file 'inf' which contains Intel Hex formated data,
* parse the file and lay it out within the memory buffer pointed to
* by outbuf. The size of outbuf, 'bufsize' is honored; if data would
* fall outsize of the memory buffer outbuf, an error is generated.
*
* Return the maximum memory address within 'outbuf' that was written.
* If an error occurs, return -1.
*
* */
int ihex2b(char * infile, FILE * inf,
unsigned char * outbuf, int bufsize)
{
char buffer [ MAX_LINE_LEN ];
unsigned char * buf;
unsigned int nextaddr, baseaddr, maxaddr;
int i;
int lineno;
int len;
struct ihexrec ihex;
int rc;
lineno = 0;
buf = outbuf;
baseaddr = 0;
maxaddr = 0;
while (fgets((char *)buffer,MAX_LINE_LEN,inf)!=NULL) {
lineno++;
len = strlen(buffer);
if (buffer[len-1] == '\n')
buffer[--len] = 0;
if (buffer[0] != ':')
continue;
rc = ihex_readrec(&ihex, buffer);
if (rc < 0) {
fprintf(stderr, "%s: invalid record at line %d of \"%s\"\n",
progname, lineno, infile);
return -1;
}
else if (rc != ihex.cksum) {
fprintf(stderr, "%s: ERROR: checksum mismatch at line %d of \"%s\"\n",
progname, lineno, infile);
fprintf(stderr, "%s: checksum=0x%02x, computed checksum=0x%02x\n",
progname, ihex.cksum, rc);
return -1;
}
switch (ihex.rectyp) {
case 0: /* data record */
nextaddr = ihex.loadofs + baseaddr;
if (nextaddr + ihex.reclen > bufsize) {
fprintf(stderr,
"%s: ERROR: address 0x%04x out of range at line %d of %s\n",
progname, nextaddr+ihex.reclen, lineno, infile);
return -1;
}
for (i=0; i<ihex.reclen; i++) {
buf[nextaddr+i] = ihex.data[i];
}
if (nextaddr+ihex.reclen > maxaddr)
maxaddr = nextaddr+ihex.reclen;
break;
case 1: /* end of file record */
return maxaddr;
break;
case 2: /* extended segment address record */
baseaddr = (ihex.data[0] << 8 | ihex.data[1]) << 4;
break;
case 3: /* start segment address record */
/* we don't do anything with the start address */
break;
case 4: /* extended linear address record */
baseaddr = (ihex.data[0] << 8 | ihex.data[1]) << 16;
break;
case 5: /* start linear address record */
/* we don't do anything with the start address */
break;
default:
fprintf(stderr,
"%s: don't know how to deal with rectype=%d "
"at line %d of %s\n",
progname, ihex.rectyp, lineno, infile);
return -1;
break;
}
} /* while */
fprintf(stderr,
"%s: WARNING: no end of file record found for Intel Hex "
"file \"%s\"\n",
progname, infile);
return maxaddr;
}
int fileio_rbin(struct fioparms * fio,
char * filename, FILE * f, unsigned char * buf, int size)
{
int rc;
switch (fio->op) {
case FIO_READ:
rc = fread(buf, 1, size, f);
break;
case FIO_WRITE:
rc = fwrite(buf, 1, size, f);
break;
default:
fprintf(stderr, "%s: fileio: invalid operation=%d\n",
progname, fio->op);
return -1;
}
if (rc < 0 || (fio->op == FIO_WRITE && rc < size)) {
fprintf(stderr,
"%s: %s error %s %s: %s; %s %d of the expected %d bytes\n",
progname, fio->iodesc, fio->dir, filename, strerror(errno),
fio->rw, rc, size);
return -1;
}
return rc;
}
int fileio_ihex(struct fioparms * fio,
char * filename, FILE * f, unsigned char * buf, int size)
{
int rc;
switch (fio->op) {
case FIO_WRITE:
rc = b2ihex(buf, size, 32, 0, filename, f);
if (rc < 0) {
return -1;
}
break;
case FIO_READ:
rc = ihex2b(filename, f, buf, size);
if (rc < 0)
return -1;
break;
default:
fprintf(stderr, "%s: invalid Intex Hex file I/O operation=%d\n",
progname, fio->op);
return -1;
break;
}
return rc;
}
int fileio_srec(struct fioparms * fio,
char * filename, FILE * f, unsigned char * buf, int size)
{
fprintf(stderr, "%s: Motorola S-Record %s format not yet supported\n",
progname, fio->iodesc);
return -1;
}
int fileio_setparms(int op, struct fioparms * fp)
{
fp->op = op;
switch (op) {
case FIO_READ:
fp->mode = "r";
fp->iodesc = "input";
fp->dir = "from";
fp->rw = "read";
break;
case FIO_WRITE:
fp->mode = "w";
fp->iodesc = "output";
fp->dir = "to";
fp->rw = "wrote";
break;
default:
fprintf(stderr, "%s: invalid I/O operation %d\n",
progname, op);
return -1;
break;
}
return 0;
}
int fmt_autodetect(char * fname)
{
FILE * f;
unsigned char buf[MAX_LINE_LEN];
int i;
int len;
int found;
f = fopen(fname, "r");
if (f == NULL) {
fprintf(stderr, "%s: error opening %s: %s\n",
progname, fname, strerror(errno));
return -1;
}
while (fgets((char *)buf, MAX_LINE_LEN, f)!=NULL) {
buf[MAX_LINE_LEN-1] = 0;
len = strlen((char *)buf);
if (buf[len-1] == '\n')
buf[--len] = 0;
/* check for binary data */
found = 0;
for (i=0; i<len; i++) {
if (buf[i] > 127) {
found = 1;
break;
}
}
if (found)
return FMT_RBIN;
/* check for lines that look like intel hex */
if ((buf[0] == ':') && (len >= 11)) {
found = 1;
for (i=1; i<len; i++) {
if (!isxdigit(buf[1])) {
found = 0;
break;
}
}
if (found)
return FMT_IHEX;
}
/* check for lines that look like motorola s-record */
if ((buf[0] == 'S') && (len >= 10) && isdigit(buf[1])) {
found = 1;
for (i=1; i<len; i++) {
if (!isxdigit(buf[1])) {
found = 0;
break;
}
}
if (found)
return FMT_SREC;
}
}
return -1;
}
int fileio(int op, char * filename, FILEFMT format,
struct avrpart * p, char * memtype, int size)
{
int rc;
FILE * f;
char * fname;
unsigned char * buf;
struct fioparms fio;
int i;
AVRMEM * mem;
mem = avr_locate_mem(p, memtype);
if (mem == NULL) {
fprintf(stderr,
"fileio(): memory type \"%s\" not configured for device \"%s\"\n",
memtype, p->desc);
return -1;
}
rc = fileio_setparms(op, &fio);
if (rc < 0)
return -1;
if (strcmp(filename, "-")==0) {
if (fio.op == FIO_READ) {
fname = "<stdin>";
f = stdin;
}
else {
fname = "<stdout>";
f = stdout;
}
}
else {
fname = filename;
f = fopen(fname, fio.mode);
if (f == NULL) {
fprintf(stderr, "%s: can't open %s file %s: %s\n",
progname, fio.iodesc, fname, strerror(errno));
return -1;
}
}
/* point at the requested memory buffer */
buf = mem->buf;
if (fio.op == FIO_READ)
size = mem->size;
if (fio.op == FIO_READ) {
/* 0xff fill unspecified memory */
for (i=0; i<size; i++) {
buf[i] = 0xff;
}
}
if (format == FMT_AUTO) {
format = fmt_autodetect(fname);
if (format < 0) {
fprintf(stderr,
"%s: can't determine file format for %s, specify explicitly\n",
progname, fname);
return -1;
}
fprintf(stderr, "%s: %s file %s auto detected as %s\n",
progname, fio.iodesc, fname, fmtstr(format));
}
switch (format) {
case FMT_IHEX:
rc = fileio_ihex(&fio, fname, f, buf, size);
break;
case FMT_SREC:
rc = fileio_srec(&fio, fname, f, buf, size);
break;
case FMT_RBIN:
rc = fileio_rbin(&fio, fname, f, buf, size);
break;
default:
fprintf(stderr, "%s: invalid %s file format: %d\n",
progname, fio.iodesc, format);
return -1;
}
return rc;
}
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