Search found 1184 matches

by Dinosaur
Mar 09, 2019 3:29
Forum: Libraries
Topic: libpruio (BB D/A - I/O fast and easy)
Replies: 379
Views: 57056

Re: libpruio (BB D/A - I/O fast and easy)

Hi TJF Firstly No I dont need that many fast i/o pins, but will design the cape for the maximum I can get. I know I am testing your patience, so let me ask questions that are more general which I can't seem to find an answer for. You can have up to 17 inputs at one PRU, or up to 16 of them as output...
by Dinosaur
Mar 08, 2019 23:49
Forum: Libraries
Topic: libpruio (BB D/A - I/O fast and easy)
Replies: 379
Views: 57056

Re: libpruio (BB D/A - I/O fast and easy)

Hi TJF That sounds like you're controlling the power of the feeder by sending just a part of the half wave to the coil. This is the microscopic way. What about the macrosopic (= sending every second, third, fourth ... complete half or better full wave)? A vibration feeder should be sluggishly enough...
by Dinosaur
Mar 08, 2019 19:51
Forum: Libraries
Topic: libpruio (BB D/A - I/O fast and easy)
Replies: 379
Views: 57056

Re: libpruio (BB D/A - I/O fast and easy)

Hi TJF How much PWM outputs do you need at which frequencies? Must the output get synchronized? I have no idea, just thinking ahead as I dont want to build another board later. The delay puts thermal load on the SSR. And that's lot of work. Why not SSR with inbuild zero-circruit, like S202T02 (needs...
by Dinosaur
Mar 08, 2019 18:22
Forum: Libraries
Topic: libpruio (BB D/A - I/O fast and easy)
Replies: 379
Views: 57056

Re: libpruio (BB D/A - I/O fast and easy)

Hi TJF Which pins? All other pins that I am not using, lcd , MMC1, AIN etc. There is no cost involved and it would be irresponsible to not allow for some future piggy back board to get to those pins. Do you plan to use the PWM output from the ARM CPU? No, but I may as well allow for it. Note: The di...
by Dinosaur
Mar 08, 2019 15:31
Forum: Libraries
Topic: libpruio (BB D/A - I/O fast and easy)
Replies: 379
Views: 57056

Re: libpruio (BB D/A - I/O fast and easy)

Hi TJF My concept of loop timing is probably way different than yours. In all my programs I don't hang around anywhere, no do-loops, no pause's no waiting for input. I look for the result the next time I get there, and I get into every major routine once every program loop. But it includes setting o...
by Dinosaur
Mar 05, 2019 18:52
Forum: Libraries
Topic: libpruio (BB D/A - I/O fast and easy)
Replies: 379
Views: 57056

Re: libpruio (BB D/A - I/O fast and easy)

Hi TJF Simple optocouplers will do the trick. For output I use Darlington transistor arrays as driver, ie. ULN 2803. That means me making (or getting made) a board. Did that for 30 years,(pvn 012 opto) but now have to be aware that at 72 I may get run over by a bus :( and all my machines still runni...
by Dinosaur
Mar 04, 2019 14:35
Forum: Libraries
Topic: libpruio (BB D/A - I/O fast and easy)
Replies: 379
Views: 57056

Re: libpruio (BB D/A - I/O fast and easy)

Hi TJF The point is how many of the GPIOs do you use? That varies with each application. But the important point is that most of them I need as 24 vdc, so what ever amount is available from the BBB I have to convert. A usb I/O board is easiest for this, and it is "of the shelf". Typically ...
by Dinosaur
Mar 03, 2019 20:25
Forum: Libraries
Topic: libpruio (BB D/A - I/O fast and easy)
Replies: 379
Views: 57056

Re: libpruio (BB D/A - I/O fast and easy)

Hi TJF Luckily things have been quite for a while so I was able to do a lot on the BBB Firstly I prepared a uSD with all the utilities that I need to develop the applications. Then after saving an image of that, I started removing packages that I would not need on the internal MMCBLK1. It's amazing ...
by Dinosaur
Feb 27, 2019 19:12
Forum: Libraries
Topic: libpruio (BB D/A - I/O fast and easy)
Replies: 379
Views: 57056

Re: libpruio (BB D/A - I/O fast and easy)

Hi TJF Hope it is ok to discuss this on this forum, as we have strayed from software to hardware. Firstly those numbers I sent, were for a Ubuntu image (without Graphical Desktop) After an Update & Upgrade. So, I redid the latest debian (without desktop) and here are those numbers. These are the...
by Dinosaur
Feb 26, 2019 21:14
Forum: Libraries
Topic: libpruio (BB D/A - I/O fast and easy)
Replies: 379
Views: 57056

Re: libpruio (BB D/A - I/O fast and easy)

Hi TJF These are the numbers from top. Load average 0.06 tasks 83, 1 running 53 sleeping %cpu 1.0 uSec 1.7 sy ?? KiB Mem 494876 128456 free 46868 used 319584 buff/cache 432896 avail mem At the moment I am not locking myself into any path. Just seeing what works and what doesn't. Definitely it has to...
by Dinosaur
Feb 26, 2019 17:41
Forum: Libraries
Topic: libpruio (BB D/A - I/O fast and easy)
Replies: 379
Views: 57056

Re: libpruio (BB D/A - I/O fast and easy)

Hi TJF Note: You're working on a micro controller board with 512 MB RAM memory. Neither the Ubuntu desktop, nor the applications you installed are designed to work properly on an embedded system. That is why I am investigating a "Boot Choice" option. ie: Boot to Terminal and run a script t...
by Dinosaur
Feb 26, 2019 0:22
Forum: Libraries
Topic: libpruio (BB D/A - I/O fast and easy)
Replies: 379
Views: 57056

Re: libpruio (BB D/A - I/O fast and easy)

Hi TJF Javascript was enabled. I then tried to install the latest version of NetSurf, but there was a clash of the libpng. So, I installed the latest -dev version 1.6.36 which took FOREVER. Then tried again to update Netsurf with the same result. So, will look for an alternative. On another subject:...
by Dinosaur
Feb 25, 2019 18:38
Forum: Libraries
Topic: libpruio (BB D/A - I/O fast and easy)
Replies: 379
Views: 57056

Re: libpruio (BB D/A - I/O fast and easy)

Hi TJF

I did find that, but index.html does not show the Index box on the left side,
so I only get the first page with "NetSurf" and no way to enable it.

Will have to look for an alternative browser.

Regards
by Dinosaur
Feb 25, 2019 15:13
Forum: Libraries
Topic: libpruio (BB D/A - I/O fast and easy)
Replies: 379
Views: 57056

Re: libpruio (BB D/A - I/O fast and easy)

Hi TJF

Many thanks for that detailed explanation, perhaps I didn't understand it fully, but enough to leave it be.

Can you explain how to use the documentation for the library on the development platform please.
I don't want to go on line each time.

Regards
by Dinosaur
Feb 24, 2019 18:25
Forum: Libraries
Topic: libpruio (BB D/A - I/O fast and easy)
Replies: 379
Views: 57056

Re: libpruio (BB D/A - I/O fast and easy)

Hi TJF FYI I have installed the library successfully in the Desktop Debian "Stretch" and found that the same script works there. The only desktop application that is painfully slow is Synaptic, so I skip using that. Bootup from first press of power button till full desktop is 85 seconds. A...

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