Post Created date
M4809 Auto-baud and M0/1 DMA?
That is the point, Jim -   If I user has to choose a menu item to send the break, and then has to send 0x55 = 'U', there would likely be a significant time delay between the...
Thursday, 13 May 2021 - 17:15
SPI bus consistency
OK, lets "do the numbers"...   About 8MHz clock so lets say that clock period is 125ns which would make high for 62ns and low for 62ns (approx). To preserve the pulses,...
Wednesday, 12 May 2021 - 18:55
SPI bus consistency
Is the Tiny24 powered and initialized when its CLK pin is connected to the bus?   What speed (SPI clock frequency) is the CLK line running at? Those 1K resistors may be too...
Tuesday, 11 May 2021 - 17:06
Section overlap error when compiling
Does the code fit the section?   Jim
Tuesday, 11 May 2021 - 02:41
Important : ATmega Watchdog timer
The OP appears to be a bit vague on how watchdog timers work. Typically, it is a counter that is given an initial value. A clock then causes it to count down. When it reaches zero...
Monday, 10 May 2021 - 02:22
Advice on serial bridge using AVR (or not)
Good project. I'd probably think a little about PWM output but to drive a cable in an industrial setting, you would need op-amps and maybe transient protection. So, with PWM, it...
Friday, 7 May 2021 - 18:12
Atmega 2560 Fuse Bits Changed during normal use.
Should have written "... variety of CE tests ..." Guess there is no CE certification for "User Typing Accuracy" because this microscopic Apple wireless keyboard and its...
Friday, 7 May 2021 - 06:09
Atmega 2560 Fuse Bits Changed during normal use.
There are a variety of CT tests, and, to some degree, depending on the expected end-use, the device maker chooses the set of tests. When I was doing this 15 years ago, the...
Thursday, 6 May 2021 - 20:53
ATtiny202 - External Oscillator Circuit
Odds are, then, that the ringing is "fake" due to the ground lead on the scope probe. Or, maybe you do not have a ground connection AT the probe. You want a SHORT ground lead (few...
Thursday, 6 May 2021 - 19:47
ATtiny202 - External Oscillator Circuit
You may be able to zoom to "tighter values" but that does not necessarily mean more accuracy in the absolute sense. It might, but that varies from one model to the next.  ...
Wednesday, 5 May 2021 - 20:28
help with data in, numbers do not look right to me?
True for non COM-port devices. For a COM-port device, USB is data agnostic. The OP did not specify any context other than USB.   Jim
Wednesday, 5 May 2021 - 19:50
help with data in, numbers do not look right to me?
It is not at all clear to me what these "physical and logical ranges" apply to!   USB is just a transport mechanism that transports bytes that are given to it. It cares...
Wednesday, 5 May 2021 - 17:16