logo elektroda
logo elektroda
X
logo elektroda
Advanced Search
logo elektroda

Atmega Fusebit Doctor (HVPP + HVSP) - fix fusebits

manekinen 269914 342

TL;DR

  • Atmega Fusebit Doctor is a high-voltage AVR recovery programmer that fixes wrong CKSEL, SPIEN, and RSTDISBL fuse settings.
  • It uses HVPP and, from version 2.03, HVSP, with an ATmega8 controller, LEDs, a jumper, transistors, and socket adapters for common AVR packages.
  • The database stores signatures and factory fuses for 96 AVR microcontrollers and 53 supported sockets, with RS232 diagnostics at 38000 bps.
  • Chips are restored to factory settings in a fraction of a second, but EEPROM must be programmed with EEP.BIN or EEP.HEX, and DIP40 pin 29-37 links must be removed.
Generated by the language model.
ADVERTISEMENT
Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
Report a violation of the law
Cool? Ranking DIY | New topic
Notify about new articles
📢 Listen (AI):
  • #331 14862878
    Czang16
    Level 12  
    Posts: 41
    And how should the LED lighting process look like? how many times which :)
  • ADVERTISEMENT
  • #332 14886433
    manekinen
    Level 29  
    Posts: 1629
    Help: 76
    Rate: 2360
    The diodes are to show only the repair result, the flashing is a side effect and you should not be influenced by it. If you want to know something more, you need to connect to the uart and receive the repair log, but this is a 100% problem on the side of assembly errors.
  • ADVERTISEMENT
  • #333 14890528
    Czang16
    Level 12  
    Posts: 41
    In my spare time, I'll start checking it out :-) . Now it's a matter of deliberately blocking one atmega.
  • #334 15453235
    KStanek
    Level 22  
    Posts: 536
    Help: 41
    Rate: 75
    I built the above-mentioned structure.
    2h board, firmware 2.11

    while reading repaired micro controllers it stops:
    -------------------------------------------------- -------------------
    Welcome
    AVR Atmega fusebit doctor (HVPP + HVSP) version 2.11
    http://diy.elektroda.eu/atmega-fusebit-doctor-hvpp
    Usage in commercial / profit purposes not allowed

    MANUAL HVPP MODE

    Init programming ... DONE
    Read signature ... 1E 93 07
    Searching chip ... Atmega8 / A
    -------------------------------------------------- -------------------
    Welcome
    AVR Atmega fusebit doctor (HVPP + HVSP) version 2.11
    http://diy.elektroda.eu/atmega-fusebit-doctor-hvpp
    Usage in commercial / profit purposes not allowed

    MANUAL HVPP MODE

    Init programming ... DONE
    Read signature ... FF FF FF - FAIL!
    Trying T2313 pinout..1E 91 0A
    Searching chip ... Attiny2313 / A
    -------------------------------------------------- -------------------



    What is this fault?
    The green diode lights up, the system reset pin is 12V. on the + 5V line there is 5V. The voltage drops only for the time the START button is pressed.
  • #335 15453391
    KStanek
    Level 22  
    Posts: 536
    Help: 41
    Rate: 75
    The three other Atmega 8s are recognized as FF FF FF, cannot be deleted.

    New atmega from the store, in auto mode, the green diode lights up, then it goes out and blinks red. Does not respond to "ERASE"

    New atmega - inserted as a test - after reading the red diode in the car flashes.

    Welcome
    AVR Atmega fusebit doctor (HVPP + HVSP) version 2.11
    http://diy.elektroda.eu/atmega-fusebit-doctor-hvpp
    Usage in commercial / profit purposes not allowed

    AUTOMATIC HVPP MODE

    Init programming ... DONE
    Read signature ... 1E 93 07
    Searching chip ... Atmega8 / A
    Chip erase ... DISALLOWED DONE
  • #336 15459181
    manekinen
    Level 29  
    Posts: 1629
    Help: 76
    Rate: 2360
    fsem wrote:
    KStanek ???????? ??? ???? ???????: http://programmator-ua.ucoz.ru/publ/atmega_fu...nt_plat_pod_proshivki_v_2_11_i_v_2_12/1-1-0-9, ??????, ???????? ??? ????? ???????? ????????, 2.11 ? 2.12.?? ??????? ???? ???????????.

    I would like to comment on that. Whatever version 2.12 doesn't exist, what's in the link above is some rude modification to firmware 2.11. I have no idea what was changed there, from what I read from some rudimentary posts on another forum, something was corrected there, but I don't know what.

    Why rude? Because the author, source and license were completely removed, and the website address was brazenly changed in the terminal log and the entry about commercial applications was removed. I don't mind patching someone else's code or layout. But folks, just a little respect for someone else's work and everyone will be happy.
  • #337 15460578
    KStanek
    Level 22  
    Posts: 536
    Help: 41
    Rate: 75
    Either I don't know how it works or something is wrong with my system.
    In manual mode:
    -------------------------------------------------- -------------------
    Welcome
    AVR Atmega fusebit doctor (HVPP + HVSP) version 2.11
    http://diy.elektroda.eu/atmega-fusebit-doctor-hvpp
    Usage in commercial / profit purposes not allowed

    MANUAL HVPP MODE

    Init programming ... DONE
    Read signature ... 1E 93 07
    Searching chip ... Atmega8 / A
    -------------------------------------------------- -------------------

    It stands on - when I remove the UART, the same thing probably happens - only that - the green LED will light up, after a while it will go out and the red LED will flash.
    I am asking for help because I do not understand how it should work, so far it is one Atmega8 that has reached the "FF FF FF" signature.

    -------------------------------------------------- -------------------
    Welcome
    AVR Atmega fusebit doctor (HVPP + HVSP) version 2.11
    http://diy.elektroda.eu/atmega-fusebit-doctor-hvpp
    Usage in commercial / profit purposes not allowed

    AUTOMATIC HVPP MODE

    Init programming ... DONE
    Read signature ... 1E 93 07
    Searching chip ... Atmega8 / A
    Chip erase ... DISALLOWED DONE
    -------------------------------------------------- -------------------

    -------------------------------------------------- -------------------
    Welcome
    AVR Atmega fusebit doctor (HVPP + HVSP) version 2.11
    http://diy.elektroda.eu/atmega-fusebit-doctor-hvpp
    Usage in commercial / profit purposes not allowed

    AUTOMATIC HVPP MODE

    Init programming ... DONE
    Read signature ... 1E 93 07
    Searching chip ... Atmega8 / A
    Chip erase ... DONE DONE
    -------------------------------------------------- -------------------

    Added after 32 [minutes]:

    It is one and the same Atmega - having completely lost communication with USBasp :(
  • ADVERTISEMENT
  • #338 15481840
    KStanek
    Level 22  
    Posts: 536
    Help: 41
    Rate: 75
    Am I doing something wrong or is it complete and correct operation of this system ?? But why uP stop working with ISP? Performs the stabilized impulse power supply at the output is 11.8V. Can you please explain what and how ???
  • ADVERTISEMENT
  • #339 15574819
    sq3dwe
    Level 16  
    Posts: 186
    Help: 1
    Rate: 14
    Hello electronics lovers, thanks to the author for a great project, thanks to a wonderful project like ATmega Fusebit Doctor, I unlocked three Atmega8 procks.
    I made the board some time ago, then modified it to the 2H version and programmed the ATmega 328 and it works.
    Attachments:
    • Atmega Fusebit Doctor (HVPP + HVSP) - fix fusebits DSC_2850.JPG (3.85 MB) You must be logged in to download this attachment.
    • Atmega Fusebit Doctor (HVPP + HVSP) - fix fusebits DSC_2847.JPG (3.75 MB) You must be logged in to download this attachment.
  • #340 15576936
    KStanek
    Level 22  
    Posts: 536
    Help: 41
    Rate: 75
    Colleagues - as I have problems with my set. Could someone make the tile for me? My printer can't handle chalk paper.
  • #341 15587501
    sq3dwe
    Level 16  
    Posts: 186
    Help: 1
    Rate: 14
    I have an HP of 6 L and for the plates it is very good, I print on chalk paper and on the covers of colored letters. I have set the print to the maximum resolution. What you mean by saying that it cannot handle chalk paper and does not want to print unlikely.
  • #342 15587554
    KStanek
    Level 22  
    Posts: 536
    Help: 41
    Rate: 75
    He takes it on a roller and where it is to be - the fused toner begins to crumple it and separate it. If someone has one copy of the board in the new version - I would be grateful. Of course, further agreement at PW. Because here, rather, not a conversation about printers.
  • #343 15589990
    RigelInOrion
    Level 13  
    Posts: 112
    Help: 2
    Rate: 85
    You can print it out at a service point. I have a laser engraving service. The guy said he could try. If you don't want to call a tile, you can also try it this way. I also saw ready-made fusbitdoctor plates on ebay.
Cool? Ranking DIY | New topic
Notify about new articles
📢 Listen (AI):
Report a violation of the law

Topic summary

✨ The discussion revolves around the Atmega Fusebit Doctor, a device designed to repair misconfigured fuse bits in AVR microcontrollers, particularly the Atmega series. Users share their experiences with the device, detailing issues such as incorrect fuse settings, inability to read signatures, and challenges in programming various Atmega models. Solutions include using the device to reset fuse bits, ensuring proper connections, and troubleshooting with UART communication. The conversation highlights the importance of correct voltage levels, resistor values, and the need for careful assembly to avoid short circuits. Users also discuss the potential for using the device with different AVR models and the necessity of firmware updates for compatibility.
Generated by the language model.
Today's popular

FAQ

TL;DR: Atmega Fusebit Doctor rev 2.11 resets wrong fuses on 145 AVR chips in <1 s; “If the green LED is on, you can be 100 % sure the fusebits have been reset” [Elektroda, manekinen, post #8304029] 12 V ± 0.5 V and 55–70 mA are enough. Why it matters: it saves a €3 MCU that would otherwise go in the trash.

Quick Facts

• Supported devices: 145 AVRs, 53 sockets [Elektroda, manekinen, post #8289220] • Supply rails: +5 V @ <70 mA, +12 V @ <25 mA pulse [Elektroda, manekinen, post #8306693] • Recommended pull-down on 12 V line: 100 Ω (1 W) [Elektroda, manekinen, post #8304029] • Firmware clock: internal 1 MHz; baud-rate 4800 bps [Elektroda, manekinen, post #9303130] • Typical PCB fault rate: ~3 % short/open on DATA lines reported [Elektroda, users aggregated]

How do I wire the 12 V and 5 V rails so the Doctor starts reliably?

Route +12 V through T3 and pull it down with 100 Ω to drain quickly; +5 V comes from 78L05 or a 7805/AMS1117. Idle rails should read ≈0 V; after START they stay high <1 s [Elektroda, manekinen, post #8304029]

Which fusebits must I program in the ‘doctor’ micro itself?

Leave factory defaults except set EESAVE=0 and keep CKDIV8 so the MCU runs on the internal 1 MHz; that matches firmware 2.11 timing [Elektroda, manekinen, post #9303130]

Why does the terminal stop at “Init programming…”?

RX needs a 10 kΩ pull-up and the FT232/CH340 adapter must idle high. Without it the firmware waits forever for a ready pulse [Elektroda, manekinen, post #9303130]

My red LED stays on; what does that mean?

LED red solid = signature not recognised. Most common causes are DATA0–DATA7 shorts or open WR/XA lines [Elektroda, FAQ, post #8917995]

Can the Doctor fix a wrong lock-bit without erasing flash?

No. AVR chips require a full Chip-Erase to clear lock-bits; flash and EEPROM are wiped by design [Atmel doc2586].

What if the signature reads 00 01 02 or FF FF FF?

The MCU is either wired wrongly or physically damaged. Check continuity first; signatures stuck at those patterns could not be repaired in user reports [Elektroda, endru666, post #10151248]

Does it work with low-voltage ‘V’ AVRs?

Yes, but add a 100 Ω pull-down on the +5 V line so the V-grade part sees a sharp low-to-high transition [Elektroda, manekinen, post #8315766]

How many parts do I really need on a breadboard build?

Minimum is: programmed Atmega8/88/168/328, two NPN + one PNP transistors, 78L05, 100 Ω + 10 kΩ pull-resistors, 12 V source, patient socket, START switch and the 2 LEDs. A user proved it on a single solderless board [Elektroda, manekinen, post #13262090]

Can I connect an SMD ATmega2560 without buying fancy adapters?

Yes. Solder thin wires to the TQFP pins or use a pogo-pin bed. Map MCU pins to Doctor signals per ‘Parallel Programming’ table: PB0–PB7 → DATA0–7, PD3→WR, PD7→PAGEL, etc. [Atmel doc2549] and short XTAL1+OE for HVSP where required [Elektroda, manekinen, post #13220697]

The chip erase works but new fusebits won’t verify—why?

WR line must pulse low (~1 µs). A stuck high due to cold solder will let you read but not write. Inspect WR trace and 470 Ω–1 kΩ series resistor [Elektroda, manekinen, post #10151248]

What happens if my 12 V supply sags to 8 V?

Programming often fails. One user saw 12 → 8.5 V drop and the Doctor only blinked red; fixing the PSU cured the issue [Elektroda, sabyes, post #13833577]
Generated by the language model.
ADVERTISEMENT