Attiny85 + arduino + sketch using RESET pin as a regular input pin

Development Tools Uploading
1

Hello,

that is scenario. I would like to upload the sketch to attiny85 (using i.a AttinyCore or Diy Attiny). But in that sketch I would to use as a digital input (in input_pullup mode) PIN1(PB5) which is RESET. How can I do that? I know that what I'm going to achieve is will one-way ticket and I'm ok with that.

Especially since there are simple HVP (ATtiny85 Powered High Voltage AVR Programmer - Hackster.io)
to reset fuse bit and getting back ability to programme attiny85.

So, how to "brick" attiny with having uploaded fully functional sketch using RESET button as a digital input_pullup?

2

If you are going to use it as an input pin, you do not have to go down that alley. Usually you can use a few resistors to create a voltage divider and use the upper range of analogRead() to use it as such.
It only makes sense to 'brick' the Attiny if you are planning to use it as a 'weak' output-pin.

3

You said it yourself, set ATTiny85 fuse to use reset pin as input, there are literally hundreds of examples on google

4

This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.