Подтверждаю лечение Atmega88P/PA (корпус TQFP)-2 штуки, последней версией «atmega_fusebit_doctor_2.11_m8″. У них был включен режим генератора 128 кГц. После поыток изменить что либо было отказано в доступе программатору. Самой большая проблема как оказалось, прижать демонтированный чип к переходной плате, из-за чего выдаваись ошибки.
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Autor: zerocross2013
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Autor: Elmer
Its like you read my mind! You appear to know so much about
this, like you wrote the book in it or something.
I think that you could do with a few pics to drive the message home a bit, but instead of that, this is
wonderful blog. A great read. I will definitely be back.
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Autor: Aman Singhal
DUDE how i will connect this to my PC
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Autor: zbynio_k
witam,
urządzenie na pewno przydatne, szczególnie przy eksperymentach z prockami :)
pytanie może trywialne ale ….
w WinXP należy użyć terminala – BRAY’S TERMINAL z działu programy ?
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Autor: Mirek
Witam,
mam takie dziwne pytanie…
1. Jaką rolę pełnią rezystory od R7 do R23? Czy nie można bezpośrednio połączyć pinów doktora z pinami pacjenta?
2. Wartość 1k chuba nie jest krytyczna? Czy można zastosować mniejsze lub większe rezystory?
Pozdrawiam Mirek
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Autor: manekinen
Ad.1 połączyć można, ale w razie konfliktu stanów logicznych uszkodzeniu mogą ulec porty jednego lub drugiego układu.
Ad.2 odpowiedź jest w opisie układu :)
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Autor: fd
Hi, there is a super-simple approach to repair Atmega8 on a breadboard and another Atmega8. The guide is in Czech, but you will probably have no problem reading it (just note č=cz, š=sz etc.).
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Autor: fd
Hi, there is a super-simple approach to repair Atmega8 on a breadboard and another Atmega8. The guide is in Czech, but you will probably have no problem reading it (just note č=cz, š=sz etc.).
http://cs.wikibooks.org/wiki/Programujeme_jednočipy#Vysokonap.C4.9B.C5.A5ov.C3.A9_paraleln.C3.AD_programov.C3.A1n.C3.AD
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Autor: darko
Hi!
My question about this project is:
In zip file/firmware are some hex files for atmega8, atmega88, atmega168…I am confused which one is correct for doctor chip.
I have to repair atmega8A, 8P and atmega48a (I was working with Ponyprog, so I dont know why that happened)
I follewed a blog for this project,but nothing found about that.
I belive in future I will „locked” some other controllers like ATtiny.
Another question is about buying the PCB s for doctor and adapters. where can I buy them?
Thank you !
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Autor: manekinen
Hex files are for DOCTOR chip, not the patient chip. If you are using lets say mega88 as doctor chip, then burn the mega88 hex. This hex support whole list of patients mentioned in the description and you’ll be able to fix all of them.
PCBs are not available for sale. You have to make them yourself or order at your local pcb manufacturer using attached files.
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Autor: Arne
Hi,
i just build your Fusebit-Doctor on my own PCB, it is quite similar to your Version 2.11. (i did my own because Eagle is messing with my printer…) The Fusebit-Doctor ist working just fine, (i tried wrong fuses CKSEL fusebits and SPIEN fuse). However, it is not able to repair RSTDISBL fuse on ATtiny2313 and ATMega8. Could you please help me? Right now i do not have the ability to conect to a PC. :(
Thanks
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Autor: Arne
I am sorry, i forgot to tell you that the green Led is flashing after trying to fix the Chips with RSTDISBL. It does not matter if i open the jumper or not.
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Autor: Euphoria
what is the shiny coating on the top of your pcb? Great project, and thank you
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Autor: manekinen
Check your 12V line. It should be not more not less when activated (1 second after pressing a button) if its below 12V, maybe transistor is too weak or pulldown is too strong. When its in iddle (after 1second), it should be near zero volts (below 0,5V) if not, maybe pulldown resistor is too weak.
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Autor: Sandor
Hi Pawel,
my MegafusebitDoc did not work. At wich Pins i can measure (and what can i measure) how the program is coreccted flashed to the Mega8?
Do you have Sprint Layout, than i can send you the PCB File and you can (maybe) tell me the Errors? Its the third time, when i build the Fusebitdoc and no PCB will be work…
Sry for my bad english…
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Autor: Martin
Hi,
very me taked circuitry ….
I’d like him built.
Downloaded we’re data for PCB and opened in Eagle 6.5.0.
Found out am, that the near PCB is missing several connections in the area these parts – see picture.
Have you got please to disposition file with full PCB ?
In advance thank you behind his sending.
Martin http://www.edisk.cz/stahni/00502/PCB.png_18.71KB.html
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Autor: manekinen
Click „ratsnest” after loading in eagle. If you don’t know how to use eagle, please use pdf version – ready to print.
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Autor: Martin
Hi, Much thank you for wrinkle.
Yesterday am it tried and no respond it.
Now is that a already OK.
Thanks.
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Autor: Mr. Solder
Built the Fusebit Doctor during recent days. I’ve managed to include every option on a single 100×70 mm dot matrix breadboard, except the AT90S8515 socket (which I’ll never need).
Additional jumpers were added for the HVSP mode and the serial access.
http://img5.fotos-hochladen.net/uploads/avrfusebitdocxnhub8rz4o.jpg
It works very well – good job, pal!
I’ve tested successfully with ATtiny 13A, 15, 44, 45, 84, 2313 and ATmega 32.
With ATtiny 12 there seems to be a small bug.
Look at that:
AUTOMATIC HVSP MODE
Init programming… DONE
Read signature… 1E 90 05
Searching chip… no names in 8kB ver
Chip erase… DONE
Read fusebits… L:52 H:00 E:00
Should be… L:52 H:00 E:00
Lockbits… ENABLED (86)
Please allow to erase the chip to disable lockbits
Thank You
The erase mode was definitely enabled, the issue is reproducible with different ATtiny12 chips (the lock bits weren’t altered and are still on factory settings).
Perhaps you can provide a fix.
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Autor: manekinen
Hi, i am glad it worked.
I never tested attiny12 and i think no one reported this to me, so yes it can be bugged. The communication seems to be ok, because 1E9005 is a proper tiny12 signature. Tiny12 must have different meaning or order of lock bits and software is trying to read them as other tinys, nothing more. Fuses are read good? I can’t provide a fix in a close future, it’s not a lack of tiny12 in my invertory because i can sent the software for test to You, but i don’t have such possibility right now to provide a fix.
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