198 lines
6.3 KiB
C
198 lines
6.3 KiB
C
/*
|
|
* avrdude - A Downloader/Uploader for AVR device programmers
|
|
* avrdude is Copyright (C) 2000-2004 Brian S. Dean <bsd@bsdhome.com>
|
|
*
|
|
* This file: Copyright (C) 2005 Colin O'Flynn <coflynn@newae.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
|
|
*/
|
|
|
|
|
|
#include <stdio.h>
|
|
|
|
#include "ac_cfg.h"
|
|
#include "avr.h"
|
|
#include "pgm.h"
|
|
#include "safemode.h"
|
|
|
|
/* This value from ac_cfg.h */
|
|
char * progname = PACKAGE_NAME;
|
|
|
|
/* Writes the specified fuse in fusename (can be "lfuse", "hfuse", or "efuse") and verifies it. Will try up to tries
|
|
amount of times before giving up */
|
|
int safemode_writefuse (unsigned char fuse, char * fusename, PROGRAMMER * pgm, AVRPART * p, int tries, int verbose)
|
|
{
|
|
AVRMEM * m;
|
|
unsigned char fuseread;
|
|
int returnvalue = -1;
|
|
|
|
m = avr_locate_mem(p, fusename);
|
|
if (m == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
/* Keep trying to write then read back the fuse values */
|
|
while (tries > 0) {
|
|
avr_write_byte(pgm, p, m, 0, fuse);
|
|
avr_read_byte(pgm, p, m, 0, &fuseread);
|
|
|
|
/* Report information to user if needed */
|
|
if (verbose > 0) {
|
|
fprintf(stderr, "%s: safemode: Wrote %s to %x, read as %x. %d attempts left\n",
|
|
progname, fusename, fuse, fuseread, tries-1);
|
|
}
|
|
|
|
/* If fuse wrote OK, no need to keep going */
|
|
if (fuse == fuseread) {
|
|
tries = 0;
|
|
returnvalue = 0;
|
|
}
|
|
tries--;
|
|
}
|
|
|
|
return returnvalue;
|
|
}
|
|
|
|
/* Reads the fuses three times, checking that all readings are the same. This will ensure that the before values aren't in error! */
|
|
int safemode_readfuses (char * lfuse, char * hfuse, char * efuse, PROGRAMMER * pgm, AVRPART * p, int verbose)
|
|
{
|
|
|
|
unsigned char value;
|
|
unsigned char fusegood = 0;
|
|
unsigned char safemode_lfuse;
|
|
unsigned char safemode_hfuse;
|
|
unsigned char safemode_efuse;
|
|
AVRMEM * m;
|
|
|
|
safemode_lfuse = *lfuse;
|
|
safemode_hfuse = *hfuse;
|
|
safemode_efuse = *efuse;
|
|
|
|
/* Read lfuse three times */
|
|
fusegood = 2; /* If AVR device doesn't support this fuse, don't want
|
|
to generate a verify error */
|
|
m = avr_locate_mem(p, "lfuse");
|
|
if (m != NULL) {
|
|
fusegood = 0; /* By default fuse is a failure */
|
|
avr_read_byte(pgm, p, m, 0, &safemode_lfuse);
|
|
avr_read_byte(pgm, p, m, 0, &value);
|
|
if (value == safemode_lfuse) {
|
|
avr_read_byte(pgm, p, m, 0, &value);
|
|
if (value == safemode_lfuse){
|
|
fusegood = 1; /* Fuse read OK three times */
|
|
}
|
|
}
|
|
}
|
|
|
|
if (fusegood == 0) {
|
|
fprintf(stderr,
|
|
"%s: safemode: Verify error - unable to read lfuse properly. "
|
|
"Programmer may not be reliable.\n", progname);
|
|
return -1;
|
|
}
|
|
else if ((fusegood == 1) && (verbose > 0)) {
|
|
printf("%s: safemode: lfuse reads as %X\n", progname, safemode_lfuse);
|
|
}
|
|
|
|
/* Read hfuse three times */
|
|
fusegood = 2; /* If AVR device doesn't support this fuse, don't want
|
|
to generate a verify error */
|
|
m = avr_locate_mem(p, "hfuse");
|
|
if (m != NULL) {
|
|
fusegood = 0; /* By default fuse is a failure */
|
|
avr_read_byte(pgm, p, m, 0, &safemode_hfuse);
|
|
avr_read_byte(pgm, p, m, 0, &value);
|
|
if (value == safemode_hfuse) {
|
|
avr_read_byte(pgm, p, m, 0, &value);
|
|
if (value == safemode_hfuse){
|
|
fusegood = 1; /* Fuse read OK three times */
|
|
}
|
|
}
|
|
}
|
|
|
|
if (fusegood == 0) {
|
|
fprintf(stderr,
|
|
"%s: safemode: Verify error - unable to read hfuse properly. "
|
|
"Programmer may not be reliable.\n", progname);
|
|
return -2;
|
|
}
|
|
else if ((fusegood == 1) && (verbose > 0)){
|
|
printf("%s: safemode: hfuse reads as %X\n", progname, safemode_hfuse);
|
|
}
|
|
|
|
/* Read efuse three times */
|
|
fusegood = 2; /* If AVR device doesn't support this fuse, don't want
|
|
to generate a verify error */
|
|
m = avr_locate_mem(p, "efuse");
|
|
if (m != NULL) {
|
|
fusegood = 0; /* By default fuse is a failure */
|
|
avr_read_byte(pgm, p, m, 0, &safemode_efuse);
|
|
avr_read_byte(pgm, p, m, 0, &value);
|
|
if (value == safemode_efuse) {
|
|
avr_read_byte(pgm, p, m, 0, &value);
|
|
if (value == safemode_efuse){
|
|
fusegood = 1; /* Fuse read OK three times */
|
|
}
|
|
}
|
|
}
|
|
|
|
if (fusegood == 0) {
|
|
fprintf(stderr,
|
|
"%s: safemode: Verify error - unable to read efuse properly. "
|
|
"Programmer may not be reliable.\n", progname);
|
|
return -3;
|
|
}
|
|
else if ((fusegood == 1) && (verbose > 0)) {
|
|
printf("%s: safemode: efuse reads as %X\n", progname, safemode_efuse);
|
|
}
|
|
|
|
*lfuse = safemode_lfuse;
|
|
*hfuse = safemode_hfuse;
|
|
*efuse = safemode_efuse;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* This routine will store the current values pointed to by lfuse, hfuse, and efuse into an internal buffer in this routine
|
|
when save is set to 1. When save is 0 (or not 1 really) it will copy the values from the internal buffer into the locations
|
|
pointed to be lfuse, hfuse, and efuse. This allows you to change the fuse bits if needed from another routine (ie: have it so
|
|
if user requests fuse bits are changed, the requested value is now verified */
|
|
int safemode_memfuses (int save, unsigned char * lfuse, unsigned char * hfuse, unsigned char * efuse)
|
|
{
|
|
static unsigned char safemode_lfuse = 0xff;
|
|
static unsigned char safemode_hfuse = 0xff;
|
|
static unsigned char safemode_efuse = 0xff;
|
|
|
|
switch (save) {
|
|
|
|
/* Save the fuses as safemode setting */
|
|
case 1:
|
|
safemode_lfuse = *lfuse;
|
|
safemode_hfuse = *hfuse;
|
|
safemode_efuse = *efuse;
|
|
|
|
break;
|
|
/* Read back the fuses */
|
|
default:
|
|
*lfuse = safemode_lfuse;
|
|
*hfuse = safemode_hfuse;
|
|
*efuse = safemode_efuse;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|