RGD2

@bmentink My apologies bmentink. I would indeed like to try the opencore uart. github is a little odd in that submitting patches is somewhat complicated, at least to set up...

Ok Bernie - I can't see the attachment though, neither through my email copy of this thread, nor at https://github.com/jamesbowman/swapforth/issues/45

Hmm... Very odd. It works fine with the j1a @ 48MHz on the icestick But with the j4a @ 48MHz on the ice40hx8k breakout board drops characters extremely often. I.e,...

( At some point, I will go through and rebase/squash/separate/clean a lot of the commits on my j4a-pmod branch... it's gotten to be a bit of a fork, and not...

Yes, and no. The core actually runs to the same clock internally, there's no division, and it doesn't actually have four j1's in it. Only four stacks. My issue could...

No, because you don't need either DTR or RTS, or any other auxiliary control line: just RX and TX. Perhaps our issues are to do with the FTDI chip?? The...

I've just been reading back over this issue this morning (and cleaning out the copied comments the email responses left). Between then and now, I'd been reading up on the...

DTR is (ab?)used to control the j1a/j4a reset signal. In that context, it's a single-bit 'gpio' type thing that just happens to be available for use that way on that...

Here's an actual little 'conversation' I had recently with the deployed j4a, in the middle of an experimental run. I wanted '1000' on the stack, because I was about to...

I was just now able to reproduce the above on a different dev board -- using an application-specific image. And my issue *isn't* the serial port: It does seem to...