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Writing ISR in assembly. AVR-GCC 5.4.0
Greetings -   I want to write the entire ISR in assembly (rest of my program is in C) but having trouble with the static local variables inside ISR. For example...
Wednesday, 27 April 2022 - 21:11
Can anyone find this slide switch?
  Hi, I am looking for this slide switch replacement, it seems to be SP3T type, but not sure. I can hookup some other switch by adding some wires but I am particularly...
Wednesday, 23 March 2022 - 15:12
What is underneath ATmega324PB (VQFN/QFN)?
Hello everyone,   I am making a board for ATmega324PB which is in TQFP lead package. Due to shortages and stuff I want to make sure that my PCB design can take ATmega324PB...
Friday, 8 October 2021 - 14:24
megaAVR mixing assembly with [gcc] C language, confusion (saving & restoring registers).
Hello everyone,   I am having trouble understanding this concept. I want to sprinkle some assembly at places in C program where it is slow/can be improved and my preferred...
Friday, 1 October 2021 - 09:35
Need magnification lens for soldering like this one.
Hi everyone,   Recently I spotted a magnifier lens/stand for soldering purposes. I found this on a 10 year video from eevblog here. Until I can afford a nice...
Sunday, 5 September 2021 - 16:49
How to choose right capacitor value for crystal.
  Hi freaks,   I am a bit puzzled on how to choose the right capacitor value. After googling and cramming as much info as I can, at last I found this piece of...
Saturday, 21 August 2021 - 21:36
Wake avr from power save with signal on normal IO pins? ATmega324PB
Hi everyone,   I am using ATmega324PB and the pins are configured this way. All the pins of PORTA , PORTB, PORTC, PORTD are defined as output and leaving me with PORTE, which...
Friday, 20 August 2021 - 04:34
[C] How to find size of an array but using only the base address of the array?
Hi everyone,   Need little help on this one. I have a utility on PC that generates some arrays  for me, and I put those arrays on megaAVR's program memory. Now the...
Monday, 9 August 2021 - 22:02
Can't update TCNT1 while debugging in simulator.
I have this problem, not sure if this affects me or everyone. I am using ATmega324PB. Every time when I try to debug something in atmel microchip studio simulator with device...
Thursday, 5 August 2021 - 08:05
ATmega324PB, How to do power trace layout for two VCC pins on PCB?
Hi everyone, I have one ATmega324PB on PCB in TQFP package, it has two VCC pins to which I have to route +5V trace. Trouble is that they both are on the opposite side of each...
Thursday, 17 June 2021 - 11:24
[C] Absolute fastest way to zero/clear a large array but also save some program space by using ST instead of STS
Hello everyone.   Here is something that I found on one of my programming endeavor's. There was a task where I had to clear/fill an array with zero's as fast as...
Friday, 21 May 2021 - 15:07
Is it important to erase all program memory before flashing new application from bootloader?
Hi, I am on my path to write my first bootloader.   Q.1 One question is do you erase all the flash memory before writing? Or just enough pages which the...
Saturday, 1 May 2021 - 02:36

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