Hello Reginald, As no one has reponded yet, I'll leave whatever I know about this.
First off, pattern generation is definitely on our wish list. Unfortunately however, no one yet worked on the parts that we need to make it happen. Right now, the "session bus" that libsigrok uses is transporting data in one direction only: device driver->libsigrok->client In order to make pattern generation work, we would need the other direction, which isn't hard, but must be implemented first. Then, we need hardware that supports this. The FX2 is an obvious candidate, but the fx2lafw we use doesn't yet have such a feature. Someone has to add it. Afterwards, we must extend the fx2lafw libsigrok driver with the feature. Once that's done, we need to teach sigrok-cli and PV about this feature and make it accessible to the user. Each part isn't hard by itself, it's just time-consuming and no one worked on it so far. So yeah, unfortunately sigrok can't offer you this feature at this time. The FX2 however is from my point of view the ideal platform for this. All the best, -Soeren On Sat, 2019-11-23 at 17:26 +0000, Reginald Beardsley via sigrok-devel wrote: > Hi, > > I'm new to using sigrok, though I've been aware of it for many > years. I recently bought some FX2LP boards to use with it. I also > have a wide variety of small MCU dev boards. > > Does this capability exist? I've not been able to learn anything in > my searches. > > I'm involved with the HPIB-USB FW, AR488, and want to build a > dedicated test system for verifying bus timing. However, the > FX2LP can only provide 1 mA of drive per pin whereas the ATMEGA 328P > and 2560 SMD chips provide up to 40 mA per pin and 200 mA total > source/sink. I'm not committed to any particular chip, so any dev > board that is well supported as an LA and pattern generator is fine. > > I'd like to be able to generate patterns with and without timing > errors to test whatever I use for the test system. I also want to be > able to replay an LA trace through the PG. > > I'm looking for recommendations for the best dev board platform for > both LA and PG functionality. I'm not interested in COTS LA and PG > products. > > I have an HP 16702B and a 16500C, so I have professional level tools > for verifying sigrok performance on whatever I use. Though I know as > much about using them as I do sigrok. I just bought them. > > Thanks, > Reg > > > _______________________________________________ > sigrok-devel mailing list > sigrok-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/sigrok-devel _______________________________________________ sigrok-devel mailing list sigrok-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sigrok-devel
