Search found 99 matches

by AMDlloydsp
Fri May 20, 2016 11:08 pm
Forum: Software issues
Topic: BASIC interrupt priorities
Replies: 2
Views: 6106

Re: BASIC interrupt priorities

I do a great deal of interrupt-serviced I/O on SuperPro boards, on real-time automated explosives manufacturing machinery. I find it most beneficial to just set flags and "get the hell out", rather than doing 'productive work' (or especially DELAYS) inside an IRQ routine! Depending upon your IRQ rat...
by AMDlloydsp
Tue Nov 10, 2015 5:14 pm
Forum: Projects
Topic: Tools & VCS
Replies: 4
Views: 7965

Re: Tools & VCS

Gary, I'll only address the VCS question. I used to use commercial version-control, dating all the way back to the original Borland C package, and it's primitive (but usable) VCS. I find now that my versions are just as well dealt with simply by saving EVERY change as a new, sequentially-numbered (y...
by AMDlloydsp
Wed Dec 31, 2014 12:06 am
Forum: Kitchen sink
Topic: Power-On Initialize
Replies: 6
Views: 14006

Re: Power-On Initialize

Many of these little micros can be "powered" from their inputs as there are parasitic diodes in most push pull IOs. It is possible the part is never really turning off and hence not getting a good reset. --------- Wow... Bingo! And I completely forgot about that! Shucks! You can even power LS-TTL th...
by AMDlloydsp
Tue Dec 30, 2014 12:29 pm
Forum: Kitchen sink
Topic: Power-On Initialize
Replies: 6
Views: 14006

Re: Power-On Initialize

I just saw your statement, "There are some pullups on the 5V line". Pullups for what, drawing how much current? Are they just logic-level pullups, or are they driving loads? Are these references for inputs? If so, consider using the 3.3V supply for your logic level references. And don't forget that ...
by AMDlloydsp
Mon Dec 29, 2014 12:55 am
Forum: Kitchen sink
Topic: Power-On Initialize
Replies: 6
Views: 14006

Re: Power-On Initialize

Hmmm... I assume the 7V output is directly connected to J4 without a switch? Did you put a de-glitching cap across that 7V line? Some high-frequency converters will issue a jittery spike upon power-up, and de-glitching is the solution. Probably something under 0.1uf will do the trick, but you might ...
by AMDlloydsp
Fri Dec 26, 2014 9:42 pm
Forum: Kitchen sink
Topic: Power-On Initialize
Replies: 6
Views: 14006

Re: Power-On Initialize

Are you sure your power is coming up cleanly, and with a good fast rise-time?

Jittery supply switching can muck things up pretty bad. A mechanical switch on the DC leg is about the worst way to turn power on and off. Switching the AC side of a ac/dc power supply is usually fine.

Lloyd
by AMDlloydsp
Thu Dec 25, 2014 1:22 am
Forum: Projects
Topic: WiFi connections
Replies: 3
Views: 8934

Re: WiFi connections

Bruce,
You figure out how to load the SuperPro firmware via that little dongle, and you really will have made MY day!
I have (now) a bunch of them deployed, and I'm still having to take off access hatches to re-program.

Lloyd
by AMDlloydsp
Wed Dec 24, 2014 9:34 pm
Forum: Kitchen sink
Topic: Christmas
Replies: 2
Views: 10804

Christmas

Merry Christmas, y'all (y'all is a Southern USA term! <G>)

And a happy New Year!

And especially to Bruce, who made all this possible.

LLoyd
by AMDlloydsp
Mon Dec 22, 2014 10:40 pm
Forum: Your first forum
Topic: LPC812 (Free) Evaluation Board Documents
Replies: 10
Views: 28797

Re: LPC812 (Free) Evaluation Board Documents

With apologies to Johnny Marks & Brenda Lee
-----------
??? What about to US?

:o
Lloyd
by AMDlloydsp
Fri Dec 19, 2014 8:49 pm
Forum: Projects
Topic: Swiss Army knife
Replies: 2
Views: 6241

Re: Swiss Army knife

This is the turret of a multi-station rotary press making explosive devices (not ammunition). This is one of five components in the system containing SuperPro boards. A multiplicity of tasks including materials weighing, sizing, mixing, depositing, and collating for storage is done by the processors...