Comments on: Bus Pirate logic analyzer mode

By: Mike

Mike — Thu, 13 May 2010 21:14:12 +0000

I love using Sump with the Bus Pirate.
Sometimes I get an error, the BP not seeing the com port?
I will have to use it more to see if I can fix that.

I have it looking at a Pic counting with 1ms delays.

Get 5 channels Logic analyzer.

I made a cheat sheet with the Pins, cable wire color, and EZ hook Color.

You can’t beat the price on Seeeds connector. Probably fragile, I bought 2.

I had to send my Logic Sniffer back! Sad…
Messed with it for 2 days, would not trigger correctly as far as I could see.

Mike

By: Mike

Mike — Mon, 05 Apr 2010 19:08:36 +0000

Sump works with BP 4.2 here.
I am impessed!

I am wondering about on the triggering?

The instructions say to use “Mask” bit. Does masking a certain bit enable triggering on that bit or disable triggering on that particular bit.

Masking usually means to ignor a bit or make it zero.

I look forward to “rising or falling edger triggering” on a future BP firmware version.

Since Sump is going to be our interface with the Sniffer (I am on order) will it have support and a manual or help instructions.

It seems to work but I wonder if the writter will have time to keep it up to Sniffing with the Seeed Hardware?

I still like the name someone suggested ” Buss Nija”!

Thanks for great projects!
Mike

By: Rob T.

Rob T. — Thu, 25 Mar 2010 18:12:46 +0000

I was afraid of that. It sure would be nice if that were possible.

I was able to get 3.3V off the ICSP header, which was sufficient to drive my IR detector (PNA-4602).

As far as I can tell there isn’t a good place to get 5V off the (v3) board.

Thanks,
–Rob

By: Ian

Ian — Thu, 25 Mar 2010 16:04:39 +0000

As far as I know, there’s no way to run the Bus Pirate power supply in logic analyzer mode.

By: Rob T.

Rob T. — Thu, 25 Mar 2010 15:57:41 +0000

As a first experiment, I’m trying to do some simple consumer IR decoding as mentioned in this article. My first question is how can I enable power (+5V) from the bus pirate to power the IR detector? I tried going into terminal mode, setting up raw 2 wire mode so I can enable the volt reg. output. However after that it won’t go into sump logic analyzer mode.

Thanks.

By: James

James — Sun, 15 Nov 2009 01:12:30 +0000

I had been having trouble getting this mode to work as well.

Ian’s suggestion does the trick all right. Seems to work now.
I tried setting it to a couple of different values. 2000 didn’t work for me but 3000 did.

By: Ian

Ian — Fri, 06 Nov 2009 08:32:25 +0000

Has anyone tried this yet?

By: Ian

Ian — Wed, 04 Nov 2009 11:15:39 +0000

Had some error reports. I used portmon to look at the traffic, and after a few bytes sometimes there’s a read timeout. SUMP takes that to be an error, but really it’s latency from the USB->serial driver.

Changing the minimum read timeout (msec) in the FTDI driver setting to at least 4000 (device manager->ports->COMx properties->port settings->advanced in Windows) cleared any remaining problems on my system. Another way is to decrease the latency timer, but that hurts performance a lot.

Ideally, SUMP would have a simple text .ini file with settings for things like read timeout (one byte, really?), device types, and clock divider, so this stuff is easier to address. But that’s not how it’s built (yet)…