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328P sleep current wildly different between two copies
The "best" example of junk chips were the ones that contained a bit of copper inside the plastic mold and no micro, from memory there were several reels of fake AVRs.
Tuesday, 11 August 2020 - 04:44
UART not working
Try the "View hex" see what you are getting.   Also you should wait for UDRE0 to be set before sending the char, With the 50ms delay it may not matter.   while (!(...
Tuesday, 11 August 2020 - 02:20
Convert Atmega8 code to Atmega88
Please re-post your code using the <> button above, it is pretty much unreadable.
Sunday, 9 August 2020 - 22:36
Running ATTiny1616 at 20MHz
CLKCTRL.MCLKCTRLB ^ CLKCTRL_PEN_bm That looks suspicious but I don't know for sure.
Saturday, 8 August 2020 - 22:27
Suspect Advice
Hey!! you are talking bad about my neighbour.
Saturday, 8 August 2020 - 07:50
Rust support AVR friendly now
I'm comfortable with ASM with AVR, anything else is an overkill
Friday, 7 August 2020 - 23:01
Rust support AVR friendly now
Rust is something that it is usually bad, why is it good for AVRs?
Friday, 7 August 2020 - 21:54
External interrupts for ATMEGA3208.
I'm not very familiar with those chips, the flag will be set by the interrupts and you MAY have to clear it before exiting the ISR but I'm not too sure, it should clear by itself...
Tuesday, 4 August 2020 - 06:19
External interrupts for ATMEGA3208.
I have split your post into a new topic.   I don't see you calling high_priority_interrupt_example(void) in main so the interrupts are not enabled by sei();
Tuesday, 4 August 2020 - 05:56
328P sleep current wildly different between two copies
ATMega328P in my socketed test jig I guess that the power supply bypass caps are under the board? Or non existent? 
Sunday, 2 August 2020 - 23:02
Algorithm to determine if any number appears more than once in list
The water is contaminated.
Wednesday, 29 July 2020 - 21:01
Algorithm to determine if any number appears more than once in list
A loong time ago I remember some video game with the same problem.   The solution was easy: Have an array of bytes (or words I guess) to fit the largest number of numbers,...
Wednesday, 29 July 2020 - 06:02