Rigol MSO4024 I2C Decode with Segmented Memory doesn't work - Page 1
Forum section: electronics / testgear

author: veryevil
author_rank: Unknown
timestamp: September 24, 2014, 12:04:38 pm
content: Hey, we just got a shiny Rigol MSO4024 at work with the I2c and SPI decoder module but it will not decode when using segmented memory (record mode) it just stays as the first frame it captured?Is this a Bug / lack of a feature?It seems like the whole point of segmented memory is to capture packets of data and then you should be able to decode that data?Really pissed as its one of the main reasons we got the scope!

author: sacherjj
author_rank: Frequent Contributor
timestamp: September 24, 2014, 12:23:44 pm
content: I've worked with some of the decoding features on my DS4054 and for slow speed stuff like I2C and UART, I've gone to a Saleae Logic. It just came down to ease of use and speed to solve the problem. I know I haven't spent the time to get full use out of the decoding features on the scope, but I doubt it would ever get as fast for me to use as the USB logging simplicity.I'll hook up the scope to verify the signal integrity is "digital enough" and then work in the digital domain on Saleae software. They can export packets to CSV, which has been incredibly useful.

author: dr.diesel
author_rank: Super Contributor
timestamp: September 24, 2014, 01:13:47 pm
content: Quote from: veryevil onTodayat 08:04:38 AMYeah, it's BS, seehere.Make sure and email their support, those bastards need to get off their ass.

author: veryevil
author_rank: Unknown
timestamp: September 24, 2014, 01:50:45 pm
content: Thats great.I'm on to our dealer Telonic to sort it out or we are returning it. It lit a fire up his ass

author: dr.diesel
author_rank: Super Contributor
timestamp: September 24, 2014, 02:11:18 pm
content: Several of us have been emailing support for months, actually since the beginning of the year, no traction.if you really need segmented decode, might as well send it back now.

author: marmad
author_rank: Super Contributor
timestamp: September 24, 2014, 07:58:19 pm
content: Quote from: veryevil on September 24, 2014, 01:50:45 pmDecoding of segmented memory works on the Rigol DS2000 (very similar UltraVision model to the DS4000) since the last firmware release (v.#3 - March of this year), so you should be able to push Rigol to get the working code ported to the DS4000 firmware (since they share many of the same routines).

author: dr.diesel
author_rank: Super Contributor
timestamp: September 24, 2014, 08:07:21 pm
content: I've been pushing, with no luck.

author: H.O
author_rank: Frequent Contributor
timestamp: September 25, 2014, 06:55:55 am
content: Me too with basically the same results.....However, during my last conversation with them (a month plus ago) they claimed that it will be fixed in the next firmware release. It's been well over 6 months since I first contacted them about the issue and as have been said others have too - before me as well I'm sure. And yes, the issue WAS present in the DS2k firmware as well but they fixed that up quite some time ago but for some reason left the DS4k hanging. Personally I'll wait a week or two more then I'll ask them AGAIN.

author: veryevil
author_rank: Unknown
timestamp: September 25, 2014, 10:10:56 am
content: Anyone got any recommendations for a replacement with good segmented memory and serial decode? Got a budget of about £2800

author: dr.diesel
author_rank: Super Contributor
timestamp: September 25, 2014, 11:00:26 am
content: Is decoding your primary use? Might be better off with a logic analyzer. The protocol decoding on all of the Rigol scopes is done in software, segmented memory issues aside, the performance/robustness is, let's say lacking.

author: sacherjj
author_rank: Frequent Contributor
timestamp: September 25, 2014, 11:40:14 am
content: Quote from: veryevil on September 25, 2014, 10:10:56 amAre you primarily decoding fairly low speed buses (like I2C or lower speed SPI)?Get a Saleae Logic 8 or Logic 8 Pro. The usability is so much past any lab device. Instant export of captured data. The software is part of the ease of use. I can see a Logic Pro 8 in my future, with 500 MS/s of continuous capture per digital channel over USB 3. The analog options aren't going to eliminate the need for a scope, but will give the capabilities of syncing digital data with analog events that before needed an MSO.

author: H.O
author_rank: Frequent Contributor
timestamp: September 25, 2014, 12:23:22 pm
content: Hi,I've had a Saleae LOGIC for years (original 8 channel version) and it's a great little device.However, its triggering capabillities is quite limited. You can't set it up to trig on a certain data byte or anything like that. Just very basic rising/falling edge triggering. There's been talk about more advanced triggering once "the new" software is released which, as with Rigol, might be any year now - or not at all. On the other hand, the LOGIC costs way less than a single decoder licence for the DS4k.Actually, there's now a couple of new beta versions available on their. Need to check those out a bit closer.