I got my quicks today. I built one as a digital only version and the
other as a full configuration. I validated my test code for both the
analog and digital configurations. I have more testing to do to see
how much power increases on the module if I leave the oscillators
running all the time. I think it is not much and will shorten the
execution time by about 2.4 mS.
I also have 16 potentiometers that I need to wire up and make sure
everything is really working correctly. So far I have just been using
clip leads either to ground or +5 volts.
I've updated my page with some photos and code.
http://modularsynthesis.com/modules/synthmodules/PSIM-Expansion/PSIM-Expansion.htm
On a side note, somewhere between changing boards, running two power
supplies, and a load of clip leads, my CVS stopped working. I
determined that it would hang whenever executing an I2C command. I
thought I had fried my I2C chip but instead I seemed to have fried P6
or P7 on my AtomPro28. I must have done something nasty to those
pins and I didn't put over/under voltage protection on them (I should
have since those pins exit my module). I had a spare AtomPro24 so I
am running that. I guess I'll have to add some diodes when I put in a
replacement AtomPro28.
I'll update my page when I get some current measurements. For now I
think I will be a bit more slow and cautious.
Dave
--- In
ComputerVoltageSources@yahoogroups.com, "djbrow54" <davebr@...>
wrote:
>
> I may want one of these 16 analog input boards for my PSIM for a
> sequencer so I designed an ExpressPCB mini-board. For those of you
> that don't know, this is a fixed-size set of 3 quicks with no solder
> mask or silk screen for $51. It makes small runs of PCBs pretty
> affordable.