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ADC-related problem in my head.
Folks,  I'd appreciate a little help with my project.  This is my first attempt to use the ADC on the ATtiny85.  Eventually, the project will evolve, but at the...
Thursday, 6 May 2021 - 12:07
ATtiny85 TC0 timer problem with OCR0B.
Could somebody please explain why my program is doing this? I'm working in Studio-7, and I haven't transferred it to a chip yet, but when I do, it will be on an ATtiny85. I'm...
Sunday, 26 April 2020 - 02:27
Do 'high' outputs go low when in 'power-down' sleep?
Folks,  I've made a timer based on an AT85.  It turns on PB0 for an amount of time that can be programmed in.  It will eventually turn on the mains via a relay. It...
Thursday, 18 January 2018 - 00:29
Can pseudo fuses be set for the AS-7 debugger?
Hi Folks.  Only 50 minutes till 2018.  I guess it already is for some of you.   Can you tell me, please, how to make the AS7 simulator/debugger believe that the...
Sunday, 31 December 2017 - 23:27
Is my AT85 bricked? Can it be recovered?
Folks,   While working on an earlier project, I bought 10 AT85's.  I bricked a couple while doing that project, but I recently started a new project, and in the course...
Saturday, 28 October 2017 - 23:23
Why does INT0_handler fire twice?
People!  Can anybody explain this? I have a real-world problem that happens in the AT85, but does not happen in the AS-7 simulator.   I'm sorry there is a bit of reading...
Tuesday, 23 May 2017 - 17:22
Can I recover an ATtiny85 with a bad signature?
I built a programmer using an Arduino Nano.  The 10uF cap is under the Nano.   Since building it, I have reprogrammed the AT85 a lot of times, and the programmer has...
Thursday, 4 May 2017 - 16:58
I want a pulse when TCNT0 compares with OC0A
MCU : ATTiny85 Fuses: (low) e2;  (high) df. Mode: CTC   A stripped-down program is shown below.   The datasheet says that if, in TCCR0A, COM0A[1:0] = 0b11, then the...
Monday, 1 May 2017 - 16:57
How can I populate a lookup table in DSEG?
Disregard.  I was trying to initialise DSEG with a lookup table, but I have just realised that DSEG is SRAM, so any initialised value disappears at power-down. Duh!  The...
Saturday, 29 April 2017 - 18:38
Is there a list of AVR acronyms anywhere?
The AVR datasheets are full of acronyms for registers, signals, etc., and there have been many times when looking or their meanings has cost me two or three minutes.  It...
Thursday, 13 April 2017 - 22:14
Is there a fault in interrupt simulation in AS-7?
When the program below starts, it sets up a few things (it's well commented), and when it reaches "idle_loop:", it waits for INT0 to be triggered by a mains zero-crossing.  I...
Monday, 3 April 2017 - 23:25
A repository for snippets of working code
When I was learning C all those years ago, before the invention of C++, I found the library of C "snippets".  The online library was well stocked with short examples of...
Wednesday, 29 March 2017 - 14:37

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