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dilshan / avr-hv2

AVR High Voltage Programmer 2
MIT License
26 stars 6 forks source link

FYI: repurposed to program ATtiny28 via ATmega4809 (on protoboard.) #2

Closed WestfW closed 3 years ago

WestfW commented 3 years ago

(no, this isn't really an "issue.")

It happens that I have some ATtiny28 chips that I want to program. These are only programmable via HVPP, and my STK500 doesn't seem to be working, so I looked around for something else that might be able to program it, and found your avr-hv2 project.

I based the hardware (built on a protoboard) on your project, plus the datasheet, plus some other HV programmers, and started with your firmware. I don't think that much of it is left - the ATtiny28 works somewhat differently, I didn't try to make it more general, I used an ATmega4809 board as the programmer, and I implemented a more user-oriented communications protocol, but I wanted to thank you for publishing your project, since it was definitely easier to start working with it than to start from nothing...

Should you need to program a very old HVPP chip, it might be useful to look at. It's here: https://github.com/WestfW/Duino-hacks/tree/master/hvTiny28prog

Thanks!

dilshan commented 3 years ago

Hello @WestfW.

Thank you for share this information.

I had limited experience with the ATTiny family because it is not much popular here (in Sri Lanka). At the time of this development, ATTiny chips are hard to find in the market. That's the main reason I skip ATTiny support.

It's good to have HVPP support programmer firmware for the ATTiny family. Most of the time, I need these HVPPs to recover the chips, which got "bricked" by wrong fuse settings.

Thank you! :+1: