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does sbis look at the port or hardware?
If I were to  make a loop (assuming all pins are low)   start%=: sbis 0x06,6 rjmp start%=     and also a timer to say 16 ms. When this timer expires if I set...
Monday, 12 September 2022 - 00:10
moving data in ASM from a global in one clock
I have some ASM like this    asm volatile(" mov r31,%0\n start%=:sbic 0x06,6\n rjmp start%=\n out 0x0B,r31\n "::"w"(*data):"r31"); it works as it should . The loop...
Saturday, 10 September 2022 - 16:47
help designing a two mode switch circuit.
I tried a few attempts but I'm falling short on what I need. Looking for some help with a switch tat has two modes.   Concept: Via one contact, I need (a) an input accepting...
Saturday, 3 September 2022 - 23:13
Saving a clock in my out operation.
I wrote some code some time ago that simulates a multiplexer with an mega32_u4  AVR. the one thing that plagued me was the reaction time. I wait for a change on the pin and...
Saturday, 27 August 2022 - 17:54
looking for help with a atari 5200 gone bad
Looking for help from a fellow freak.   I got me a few atari 5200's laying about.  I preform a few modification to them and resell them. Normally, and to date, all...
Monday, 15 August 2022 - 22:49
hwb pin atmega32u4
From what I have read the HWB ( if configure to) will put the MCU in bootloader mode if held low on reset or power up. I am able to enter bootoader mode when I hit reset if HWB is...
Saturday, 30 July 2022 - 19:23
making a composite video brighter.
Using this simple circuit I modified an RF signal to composite. The video is very dim and the recommended fix is to use a 75k pull down as shown. This only makes the video dimmer...
Thursday, 28 July 2022 - 00:59
handling Continuous data with byte roll over
  I have an application that can only put a distance moved on a 8 bit value.  the position is sampled  at a given poll rate and for obvious reasons the slower the...
Thursday, 7 July 2022 - 02:12
Disable ucap rom code on atmega32u4?
yeah it's a crazy question, but wondering if possible. I use the Ucap for a 3.3 pull up for one particular pin. I have a scenario where I want to disable that pull up.  At...
Friday, 10 June 2022 - 02:39
Help understanding why my change worked.
Sorry, I just could not come up with an appropriate title here.   I created a project to read a voltage on a circuit with a higher resistance (impedance?). My AVR ADC could...
Sunday, 5 June 2022 - 02:48
what is avrisp-lib and how do I use it?
I have 3 usb based ISP device. 1 a 6 pin that shows up as an ARVISP_II usb device and works fine. 2 a 10 pin that show up on atmel AVRISP-lib and atmel 6 does not see it. 3 some...
Sunday, 29 May 2022 - 22:31
compiler does not use two's complement ?
Working with avr studio 6.2 and a atmega32u4.     I ran some code on a simulator. int main() { unsigned char n = 10- 5; unsigned char n2 = 5- 10;...
Monday, 23 May 2022 - 01:27

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