Comments on: Howto recover wrong fuses settings on a AVR http://www.larsen-b.com/Article/260.html Titanium Expos̩ Wed, 17 Feb 2010 23:06:54 +0100 http://wordpress.org/?v=2.8.4 hourly 1 By: Ben Ryves http://www.larsen-b.com/Article/260.html/comment-page-1#comment-7701 Ben Ryves Sun, 25 Oct 2009 23:21:11 +0000 #comment-7701 Thank you for posting this! Rather than program another microcontroller, you can use a standard crystal oscillator circuit, such as one of these - http://z80.info/uexosc.htm - to coax the AVR back to life. Thank you for posting this! Rather than program another microcontroller, you can use a standard crystal oscillator circuit, such as one of these Рhttp://z80.info/uexosc.htm Рto coax the AVR back to life.

]]> By: VidPro http://www.larsen-b.com/Article/260.html/comment-page-1#comment-7695 VidPro Wed, 21 Oct 2009 19:15:32 +0000 #comment-7695 The #include should be &lt avr/io.h &gt The #include should be &lt avr/io.h &gt

]]> By: VidPro http://www.larsen-b.com/Article/260.html/comment-page-1#comment-7694 VidPro Wed, 21 Oct 2009 19:12:34 +0000 #comment-7694 I had bricked 2 Atmega8's and used the external clock method with this code running on another atmega8: #define F_CPU 1000000UL /* 1 MHz CPU clock */ #include int main (void) { DDRC = _BV (PC0); /* PC0 is digital output */ while (1) /* loop forever */ { /* set PC0 on PORTC (digital high) */ PORTC &= ~_BV(PC0); } return (0); } I then connected pin 23 if the working avr to pin 9 of the bricked avr and then restored the fuses. Worked for me on the 2 I screwed up... maybe it will help others used AVR studio to compile. I had bricked 2 Atmega8’s and used the external clock method with this code running on another atmega8:

#define F_CPU 1000000UL /* 1 MHz CPU clock */

#include

int
main (void)
{
DDRC = _BV (PC0); /* PC0 is digital output */

while (1) /* loop forever */
{
/* set PC0 on PORTC (digital high) */
PORTC &= ~_BV(PC0);

}

return (0);
}

I then connected pin 23 if the working avr to pin 9 of the bricked avr and then restored the fuses. Worked for me on the 2 I screwed up… maybe it will help others

used AVR studio to compile.

]]> By: Dolphin http://www.larsen-b.com/Article/260.html/comment-page-1#comment-7629 Dolphin Wed, 22 Jul 2009 09:32:08 +0000 #comment-7629 I mean that I can't use this way to recover my AVR which has been recovered before (more clearly, I can use this way only one time). This is my programmer : http://www.lancos.com/prog.html . So, this is my problem. Thanks. I mean that I can’t use this way to recover my AVR which has been recovered before (more clearly, I can use this way only one time). This is my programmer : http://www.lancos.com/prog.html . So, this is my problem.
Thanks.

]]> By: admin http://www.larsen-b.com/Article/260.html/comment-page-1#comment-7628 admin Tue, 21 Jul 2009 21:06:13 +0000 #comment-7628 Dolphin : Perhaps you need to explain, what you screw up .. Arimarjul : You have to use a parallel programming mode .. this can be done with a STK500, or a JTAG if you don't break the Jtag enable fuse .. The parallel flash is the ultimate one, but this require to have a special programmer like the STK500.. Dolphin : Perhaps you need to explain, what you screw up ..

Arimarjul : You have to use a parallel programming mode .. this can be done with a STK500, or a JTAG if you don’t break the Jtag enable fuse ..

The parallel flash is the ultimate one, but this require to have a special programmer like the STK500..

]]> By: arimarjul http://www.larsen-b.com/Article/260.html/comment-page-1#comment-7623 arimarjul Tue, 21 Jul 2009 11:48:29 +0000 #comment-7623 HI! I have a worst problem. I work with a atmega 8/16/32 and use a AVRISPmkII to program them. But the problem occurs when some uC has the SPIEN fuse in '1'.(serial programming disabled). What can I do to fix this problem? I have a great amount of this uC. Please help me!!! HI!
I have a worst problem. I work with a atmega 8/16/32 and use a AVRISPmkII to program them.
But the problem occurs when some uC has the SPIEN fuse in ‘1′.(serial programming disabled).
What can I do to fix this problem? I have a great amount of this uC.
Please help me!!!

]]> By: Dolphin http://www.larsen-b.com/Article/260.html/comment-page-1#comment-7615 Dolphin Tue, 14 Jul 2009 09:31:11 +0000 #comment-7615 I had used this way to recover wrong fuses settings on my AVR (ATmega8, ATtiny13) and it had worked perfectly. After then, I set wrong fuses again, I used this way to recover but it didn't worked. I don't know why, could you help me? I had used this way to recover wrong fuses settings on my AVR (ATmega8, ATtiny13) and it had worked perfectly. After then, I set wrong fuses again, I used this way to recover but it didn’t worked. I don’t know why, could you help me?

]]> By: ckeays http://www.larsen-b.com/Article/260.html/comment-page-1#comment-7205 ckeays Sat, 30 May 2009 00:55:02 +0000 #comment-7205 I found a website that sells a programmer to fix any avr. It only cost $29 and I fixed all of my locked atmega's! http://www.microcontrollerprog.com I found a website that sells a programmer to fix any avr. It only cost $29 and I fixed all of my locked atmega’s!

http://www.microcontrollerprog.com

]]> By: jejen http://www.larsen-b.com/Article/260.html/comment-page-1#comment-6965 jejen Mon, 13 Apr 2009 08:51:36 +0000 #comment-6965 I do not have any other microcontroller, what if using the LPT printer port? please give this code to generate clock using LPT parallel port ... thanks I do not have any other microcontroller, what if using the LPT printer port? please give this code to generate clock using LPT parallel port … thanks

]]> By: jXP3 http://www.larsen-b.com/Article/260.html/comment-page-1#comment-6938 jXP3 Thu, 12 Mar 2009 12:47:53 +0000 #comment-6938 For me it worked perfectly just using CKOUT of another microcontroller(attiny2313). For me it worked perfectly just using CKOUT of another microcontroller(attiny2313).

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