Re: [time-nuts] 5370 firmware hacking status report

2011-07-25 Thread Tijd Dingen
measurement time-nuts@febo.com Sent: Sunday, July 24, 2011 11:05 PM Subject: Re: [time-nuts] 5370 firmware hacking status report On Jul 24, 2011, at 2:40 PM, Poul-Henning Kamp wrote: Ethernets big advantage is that it is galvanically isolated, USB is not. You had mentioned this issue in February

Re: [time-nuts] 5370 firmware hacking status report

2011-07-25 Thread John Seamons
On Jul 25, 2011, at 2:32 PM, Tijd Dingen wrote: A quick check shows digikey sells them in single quantities, and has current stock. Good news. I hadn't checked for five months, but maybe my original search was faulty. Funny that they're $1.40 more expensive than the microcontroller ($10 vs

Re: [time-nuts] 5370 firmware hacking status report

2011-07-24 Thread Poul-Henning Kamp
In message 77e0fba5-aa78-4399-9562-d1274e109...@jks.com, John Seamons writes: I would worry a bit about the PLL locking too, but I have no idea how to actually measure it. I think the 1sec max gate-time is related to the eventcounter width, but it might be possible to simulate a wider counter in

[time-nuts] 5370 firmware hacking status report

2011-07-24 Thread Frank Stellmach
Hi, the 5370 is capable of measuring up to 10s long time events or frequency/period with 10s gate time. (I.e. 2^39 * 19.53ps) Pressing 'external holdoff' activates external gating on 'EXT' input. Then you may apply a 10s long positive pulse from an external generator, with a few ms long

Re: [time-nuts] 5370 firmware hacking status report

2011-07-24 Thread Bruce Griffiths
Poul-Henning Kamp wrote: In message77e0fba5-aa78-4399-9562-d1274e109...@jks.com, John Seamons writes: I would worry a bit about the PLL locking too, but I have no idea how to actually measure it. I think the 1sec max gate-time is related to the eventcounter width, but it might be possible to

Re: [time-nuts] 5370 firmware hacking status report

2011-07-24 Thread paul swed
John, Fantastic job on reverse engineering the counter and then actually doing something to modernize it. I might guess implementing this on one of the counters out of 3 would be both educational and interesting. Ending up with a modern on the network counter. Took a look at your setup and bench.

Re: [time-nuts] 5370 firmware hacking status report

2011-07-24 Thread John Seamons
On Jul 24, 2011, at 12:32 AM, Poul-Henning Kamp wrote: I would worry a bit about the PLL locking too, but I have no idea how to actually measure it. I think the 1sec max gate-time is related to the eventcounter width, but it might be possible to simulate a wider counter in software. The

Re: [time-nuts] 5370 firmware hacking status report

2011-07-24 Thread John Seamons
On Jul 24, 2011, at 11:18 AM, paul swed wrote: Took a look at your setup and bench. So the support for the 5370 in a HP vector network analyzer. Now thats some support. :-) I might tend to have the two flipped in the stack. So you are suggesting the potential to make this operational to a

Re: [time-nuts] 5370 firmware hacking status report

2011-07-24 Thread Poul-Henning Kamp
In message 2774adf8-762d-45c4-b3c6-edb188691...@jks.com, John Seamons writes: On Jul 24, 2011, at 11:18 AM, paul swed wrote: I really need to get a PCI or USB GPIB interface like everyone else. Anyone running John's GPIB Toolkit under Wine on Ubuntu? /insert Windows rant

Re: [time-nuts] 5370 firmware hacking status report

2011-07-24 Thread Bob Camp
Hi I would check that things like Win 7 64 bit are happy with the USB stack on the micro. I'm not selling anybody MS stuff, but it limits your audiance if there's a compatibility issue. Some USB stacks are a lot better than others (both embedded and at the OS level). Ethernet is going to be

Re: [time-nuts] 5370 firmware hacking status report

2011-07-24 Thread John Seamons
On Jul 24, 2011, at 2:40 PM, Poul-Henning Kamp wrote: Ethernets big advantage is that it is galvanically isolated, USB is not. You had mentioned this issue in February. And since I currently flash using USB I went ahead and bought the evaluation card for the Analog Devices ADuM4160

[time-nuts] 5370 firmware hacking status report

2011-07-23 Thread John Seamons
Some progress since February's discussion: My m6800 emulator running the 5370 firmware has been moved from the Linux box to a little 32-bit microcontroller on it's own small evaluation-kit board. Pictures here: http://jks.com (click on images for larger versions) You talk to it over an Ethernet

Re: [time-nuts] 5370 firmware hacking status report

2011-07-23 Thread Bruce Griffiths
John Seamons wrote: Some progress since February's discussion: My m6800 emulator running the 5370 firmware has been moved from the Linux box to a little 32-bit microcontroller on it's own small evaluation-kit board. Pictures here: http://jks.com (click on images for larger versions) You talk

Re: [time-nuts] 5370 firmware hacking status report

2011-07-23 Thread John Miles
Now all this is fine, and somewhat amusing, but it's not clear there is any particular advantage. It's not as though there are piles of 5370s lying around with dead or missing CPU cards. Or that it's impossible to deal with HPIB anymore. One interesting possibility is adding new front-panel