1Khz Square wave - how much is too much different?

[hoglet]

decuser wrote:

Ha. I kept hoping it was the code! That’d be the easiest to fix. Meanwhile. I’m gonna keep digging!

I still think it's likely to be a measurement error.

Would you be able to share a link to the logic analyzer capture file?

Dave

[GaBuZoMeu]

1. Your main oscillator isn't running @ 1.0000000000000000000000000000 MHz.
2. The rise and fall times of your signal may be different. The difference may further depend on the load.

- my 2 cents