Re: [avr-gcc-list] ATMega32 fuse bit problem
Hi.. I was able to revive a completely wacked out atmega32 by the following: KEY - attach a 12mhz xtal (instead of a 16mhz xtal) code for default with jtag disabled: avrdude -p m32 -b 19200 -P COM3 -c avrisp -V -F -e -u -U lock:w:0×3F:m -U lfuse:w:0xe1:m -U hfuse:w:0xd9:m then re-attach your 16mhz xtal and use this: (defaults for 16mhz xtal / jtag disabled / fast power-up): avrdude -p m32 -b 19200 -P COM3 -c avrisp -V -F -e -u -U lock:w:0x3F:m -U lfuse:w:0xef:m -U hfuse:w:0xd9:m //...how sweet it is James Pascoe wrote: Hi All, Apologies for the following question which is very OT, but there is a good chance you guys can help. I am using an ATMega32 and inadvertantly programmed the fuse bits wrong :-( ... instead of setting the fuse bits to use a 16 Mhz external crystal as the clock source, I programmed the chip to use the low frequency crystal oscillator setting. Of course now, I can not program the device anymore. Does anybody know if there is any way (other than getting hold of a 32.768 Khz crystal) that I can recover the device ? Many thanks for any suggestions, James ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list -- View this message in context: http://old.nabble.com/ATMega32-fuse-bit-problem-tp12189077p29627870.html Sent from the AVR - gcc mailing list archive at Nabble.com. ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
Re: [avr-gcc-list] ATMega32 fuse bit problem
James, You can also use high voltage parallel programming mode to set fuses even when serial communication is not possible (oscillator set incorrectly, reset pin disabled, debugwire enabled, etc.). A while back I made a simple circuit to allow an Arduino to parallel program the ATmega44/88/168/328. You can try using a circuit like this if the fix wlewis posted fails. I believe the STK500 and the AVR Dragon also support HVPP. Jeff Keyzer j...@mightyohm.com On Sep 5, 2010, at 1:29 PM, wlewis wrote: Hi.. I was able to revive a completely wacked out atmega32 by the following: KEY - attach a 12mhz xtal (instead of a 16mhz xtal) code for default with jtag disabled: avrdude -p m32 -b 19200 -P COM3 -c avrisp -V -F -e -u -U lock:w:0×3F:m -U lfuse:w:0xe1:m -U hfuse:w:0xd9:m then re-attach your 16mhz xtal and use this: (defaults for 16mhz xtal / jtag disabled / fast power-up): avrdude -p m32 -b 19200 -P COM3 -c avrisp -V -F -e -u -U lock:w:0x3F:m -U lfuse:w:0xef:m -U hfuse:w:0xd9:m //...how sweet it is James Pascoe wrote: Hi All, Apologies for the following question which is very OT, but there is a good chance you guys can help. I am using an ATMega32 and inadvertantly programmed the fuse bits wrong :-( ... instead of setting the fuse bits to use a 16 Mhz external crystal as the clock source, I programmed the chip to use the low frequency crystal oscillator setting. Of course now, I can not program the device anymore. Does anybody know if there is any way (other than getting hold of a 32.768 Khz crystal) that I can recover the device ? Many thanks for any suggestions, James ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list -- View this message in context: http://old.nabble.com/ATMega32-fuse-bit-problem-tp12189077p29627870.html Sent from the AVR - gcc mailing list archive at Nabble.com. ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
Re: [avr-gcc-list] ATMega32 fuse bit problem
Sorry, forgot the link: http://mightyohm.com/blog/2008/09/arduino-based-avr-high-voltage-programmer/ Jeff Keyzer j...@mightyohm.com On Sep 5, 2010, at 1:29 PM, wlewis wrote: Hi.. I was able to revive a completely wacked out atmega32 by the following: KEY - attach a 12mhz xtal (instead of a 16mhz xtal) code for default with jtag disabled: avrdude -p m32 -b 19200 -P COM3 -c avrisp -V -F -e -u -U lock:w:0×3F:m -U lfuse:w:0xe1:m -U hfuse:w:0xd9:m then re-attach your 16mhz xtal and use this: (defaults for 16mhz xtal / jtag disabled / fast power-up): avrdude -p m32 -b 19200 -P COM3 -c avrisp -V -F -e -u -U lock:w:0x3F:m -U lfuse:w:0xef:m -U hfuse:w:0xd9:m //...how sweet it is James Pascoe wrote: Hi All, Apologies for the following question which is very OT, but there is a good chance you guys can help. I am using an ATMega32 and inadvertantly programmed the fuse bits wrong :-( ... instead of setting the fuse bits to use a 16 Mhz external crystal as the clock source, I programmed the chip to use the low frequency crystal oscillator setting. Of course now, I can not program the device anymore. Does anybody know if there is any way (other than getting hold of a 32.768 Khz crystal) that I can recover the device ? Many thanks for any suggestions, James ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list -- View this message in context: http://old.nabble.com/ATMega32-fuse-bit-problem-tp12189077p29627870.html Sent from the AVR - gcc mailing list archive at Nabble.com. ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
Re: [avr-gcc-list] ATMega32 fuse bit problem
Hi.. I was able to revive a completely wacked out atmega32 by the following: KEY - attach a 12mhz xtal (instead of a 16mhz xtal) code for default with jtag disabled: avrdude -p m32 -b 19200 -P COM3 -c avrisp -V -F -e -u -U lock:w:0×3F:m -U lfuse:w:0xe1:m -U hfuse:w:0xd9:m then re-attach your 16mhz xtal and use this: (defaults for 16mhz xtal / jtag disabled / fast power-up): avrdude -p m32 -b 19200 -P COM3 -c avrisp -V -F -e -u -U lock:w:0x3F:m -U lfuse:w:0xef:m -U hfuse:w:0xd9:m //...how sweet it is James Pascoe wrote: Hi All, Apologies for the following question which is very OT, but there is a good chance you guys can help. I am using an ATMega32 and inadvertantly programmed the fuse bits wrong :-( ... instead of setting the fuse bits to use a 16 Mhz external crystal as the clock source, I programmed the chip to use the low frequency crystal oscillator setting. Of course now, I can not program the device anymore. Does anybody know if there is any way (other than getting hold of a 32.768 Khz crystal) that I can recover the device ? Many thanks for any suggestions, James ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list -- View this message in context: http://old.nabble.com/ATMega32-fuse-bit-problem-tp12189077p29627869.html Sent from the AVR - gcc mailing list archive at Nabble.com. ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
Re: [avr-gcc-list] ATMega32 fuse bit problem
If you focus on erasing the chip to regain control of it, then you can use nearly anything that provides logical zeros and ones as a clock. For instance I recovered chips sometimes by using UART traffic because I had no other hardware at hand: I took a RS232-UART converter, sent a big file from a terminal emulator (with no particular protocol, just raw byte sending) and I tried a few times to erase the chip until it worked ;-) Csroluxx wrote: James Pascoe wrote: Hi All, Apologies for the following question which is very OT, but there is a good chance you guys can help. I am using an ATMega32 and inadvertantly programmed the fuse bits wrong :-( ... instead of setting the fuse bits to use a 16 Mhz external crystal as the clock source, I programmed the chip to use the low frequency crystal oscillator setting. Of course now, I can not program the device anymore. Does anybody know if there is any way (other than getting hold of a 32.768 Khz crystal) that I can recover the device ? Many thanks for any suggestions, James ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list Hi you can use one from old digital clock (or new one) =) ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
Re: [avr-gcc-list] ATMega32 fuse bit problem
For instance I recovered chips sometimes by using UART traffic because I had no other hardware at hand: I took a RS232-UART converter, sent a big file from a terminal emulator (with no particular protocol, just raw byte sending) and I tried a few times to erase the chip until it worked ;-) I did a device controller that way once, sending nulls out on the data line as clock and toggling the handshake line for data. :) The intended use is only a suggestion! ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
RE: [avr-gcc-list] ATMega32 fuse bit problem
From: [EMAIL PROTECTED] For instance I recovered chips sometimes by using UART traffic because I had no other hardware at hand: I took a RS232-UART converter, sent a big file from a terminal emulator (with no particular protocol, just raw byte sending) and I tried a few times to erase the chip until it worked ;-) I did a device controller that way once, sending nulls out on the data line as clock and toggling the handshake line for data. :) The intended use is only a suggestion! Clever! If you just want a clean clock signal from a UART, set up to transmit 8N1 and send a continuous string of ASCII 'U' (0x55). Assuming your application can keep the shift register full, you'll get a nice clean square wave whose frequency is 1/2 the baud rate (stop bit is 1, start bit is 0, and the data is transmitted LSB to MSB). Regards, -=Dave _ Windows Live Hotmail and Microsoft Office Outlook – together at last. Get it now. http://office.microsoft.com/en-us/outlook/HA102225181033.aspx?pid=CL100626971033___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
Re: [avr-gcc-list] ATMega32 fuse bit problem
You can still drive the xtal-in pin with a clock source program one of your other microcontrollers to produce a 32kHz clock on a pin and pump it in to the xtal-in then rewrite your fuses. Steve On Nov 11, 2007, at 11:24 PM, Anton Erasmus wrote: On 11 Nov 2007 at 10:59, Csroluxx wrote: Date sent: Sun, 11 Nov 2007 10:59:51 -0800 (PST) From: Csroluxx [EMAIL PROTECTED] To: avr-gcc-list@nongnu.org Subject:Re: [avr-gcc-list] ATMega32 fuse bit problem James Pascoe wrote: Hi All, Apologies for the following question which is very OT, but there is a good chance you guys can help. I am using an ATMega32 and inadvertantly programmed the fuse bits wrong :-( ... instead of setting the fuse bits to use a 16 Mhz external crystal as the clock source, I programmed the chip to use the low frequency crystal oscillator setting. Of course now, I can not program the device anymore. Does anybody know if there is any way (other than getting hold of a 32.768 Khz crystal) that I can recover the device ? Many thanks for any suggestions, James ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list Hi you can use one from old digital clock (or new one) =) You can also program via the JTAG pins, you do not need an external clock for that. The AVRDRAGON is quite cheap, which you can use to re-program the fuses. Regards Anton Erasmus -- A J Erasmus ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
Re: [avr-gcc-list] ATMega32 fuse bit problem
James Pascoe wrote: Hi All, Apologies for the following question which is very OT, but there is a good chance you guys can help. I am using an ATMega32 and inadvertantly programmed the fuse bits wrong :-( ... instead of setting the fuse bits to use a 16 Mhz external crystal as the clock source, I programmed the chip to use the low frequency crystal oscillator setting. Of course now, I can not program the device anymore. Does anybody know if there is any way (other than getting hold of a 32.768 Khz crystal) that I can recover the device ? Many thanks for any suggestions, James ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list Hi you can use one from old digital clock (or new one) =) -- View this message in context: http://www.nabble.com/ATMega32-fuse-bit-problem-tf4281995.html#a13694560 Sent from the AVR - gcc mailing list archive at Nabble.com. ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
Re: [avr-gcc-list] ATMega32 fuse bit problem
On 11 Nov 2007 at 10:59, Csroluxx wrote: Date sent: Sun, 11 Nov 2007 10:59:51 -0800 (PST) From: Csroluxx [EMAIL PROTECTED] To: avr-gcc-list@nongnu.org Subject:Re: [avr-gcc-list] ATMega32 fuse bit problem James Pascoe wrote: Hi All, Apologies for the following question which is very OT, but there is a good chance you guys can help. I am using an ATMega32 and inadvertantly programmed the fuse bits wrong :-( ... instead of setting the fuse bits to use a 16 Mhz external crystal as the clock source, I programmed the chip to use the low frequency crystal oscillator setting. Of course now, I can not program the device anymore. Does anybody know if there is any way (other than getting hold of a 32.768 Khz crystal) that I can recover the device ? Many thanks for any suggestions, James ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list Hi you can use one from old digital clock (or new one) =) You can also program via the JTAG pins, you do not need an external clock for that. The AVRDRAGON is quite cheap, which you can use to re-program the fuses. Regards Anton Erasmus -- A J Erasmus ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
Re: [avr-gcc-list] ATMega32 fuse bit problem
Cool ... thanks that worked great. Thanks guys, James Jkx wrote: On Thu, 23 Aug 2007 07:22:22 -0400 Graham Davies [EMAIL PROTECTED] wrote: James Pascoe I am using an ATMega32 and inadvertantly programmed the fuse bits wrong ... Does anybody know if there is any way (other than getting hold of a 32.768 Khz crystal) that I can recover the device ? I get the same issue, and fixed it by this way: - http://www.larsen-b.com/Article/260.html Bye bye ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
Re: [avr-gcc-list] ATMega32 fuse bit problem
On Thu, 23 Aug 2007 07:22:22 -0400 Graham Davies [EMAIL PROTECTED] wrote: James Pascoe I am using an ATMega32 and inadvertantly programmed the fuse bits wrong ... Does anybody know if there is any way (other than getting hold of a 32.768 Khz crystal) that I can recover the device ? I get the same issue, and fixed it by this way: - http://www.larsen-b.com/Article/260.html Bye bye ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
Re: [avr-gcc-list] ATMega32 fuse bit problem
On Thu, 16 Aug 2007 20:34:25 +0100 James Pascoe [EMAIL PROTECTED] wrote: Hi All, Apologies for the following question which is very OT, but there is a good chance you guys can help. Hi James, Yes this is off-topic, but it would be perfectly spot on topic on the sister list of avr-gcc : avr-chat: http://lists.nongnu.org/mailman/listinfo/avr-chat just subscribe and anything you might ask about the avr will be at home there ;-) I am using an ATMega32 and inadvertantly programmed the fuse bits wrong :-( ... instead of setting the fuse bits to use a 16 Mhz external crystal as the clock source, I programmed the chip to use the low frequency crystal oscillator setting. Of course now, I can not program the device anymore. Does anybody know if there is any way (other than getting hold of a 32.768 Khz crystal) that I can recover the device ? Many thanks for any suggestions, I use an ATmega32 too, and I think I did that mistake too ! I was suggested to drive the chip directly, by supplying a TTL clock signal on the XTAL1 pin of the chip, using a signal generator. I remember at 400KHz it allowed avrdude to chat with the AVR chip just fine, letting me reconfigure the fuse bits properly, but at 100KHz and lower, it stopped working. SO just use something in the order of 500KHZ or higher, and it should work :-) If you don't have a signal generator, it should be easy to DIY a simple/dirty clock generator/oscillator to get you out of trouble. HTH -- Vince ___ AVR-GCC-list mailing list AVR-GCC-list@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-gcc-list
