17:07 <constantinos_> Hello, i would like to ask a question about the OpenOCD, i'm kinda new to the tool and also to the embedded ecosystem and i want to know if it is possible to make a specific task. I had read the documentation but it would be a big help.

17:13 <PaulFertser> constantinos_: hey! Just ask your question.

17:16 <constantinos_> Thank you!. I'm currently using the OpenOCD with a BASYS-3 board (a 7-Series based FPGA) and what i want is to be able to read/write a frame in the CRAM on demand, to perform some tasks i want. So, in order to do that, i leveraged the low-level JTAG commands that are available when using the TELNET connection to the OpenOCD server, like irscan and

17:16 <constantinos_> drscan. So my question is: it is ok to do this in that way? is there a better way? i tried to send some configuration commands (like to readback a frame) but i kinda failed, hahahaaa.

17:31 <constantinos_> I hope that the question is clear enough '=D , cause i struggle a bit sometimes to explain that stuff.

19:17 <PaulFertser> constantinos_: hey, yes, that's clear

19:18 <PaulFertser> constantinos_: irscan+drscan is as low-level as it gets, and you can also automate sending them and getting replies via the Tcl RPC port.

19:19 <PaulFertser> constantinos_: is there any specific problem with that approach? Do you need less latency or something?

19:19 <PaulFertser> constantinos_: is there any doc about other ways people do it with an FPGA?

19:23 <PaulFertser> You can add custom commands if needed to src/pld but that's C code and if you can avoid it I suggest you do.

19:31 <constantinos_> What am doing is i send through Telnet (by hand, one by one) the words that theoretically will request a frame from the CRAM. I think that maybe is what you said, latency. Do you think with TCL will work?

19:36 <constantinos_> about the DOCs, every paper and DOC i have checked, requests a frame by using those words, so i think that either is an issue with latency or i'm doing something very wrong with the TAP controller (considering that the OpenOCD does the job fine).

19:38 <constantinos_> I will try to avoid C, ahahahahaha, that's true

19:44 <constantinos_> hmm i will maybe try more with the TCL.. thank you very much!