UEG jumpers

[Orbless]

I can't seem to find the info on what the different jumper positions are that come with the Encore UEG. Does anyone know what the jumper points are and what they do?

[doctoranalog]

I'd bet dollars-to-donuts that those aren't jumpers, but instead that's the programming port for the Atmel microprocessor.

[Orbless]

I'd bet dollars-to-donuts that those aren't jumpers, but instead that's the programming port for the Atmel microprocessor.

OK, you are not certain though?
Does anyone have a definitive answer?
I emailed encore about it more than a week ago and haven't heard back yet.

[diophantine]

Are the jumpers exposed? I don't recall noticing any, but it has been some time since I last looked at the back.

The UEG manual is fairly detailed, so I suspect if they actually did something they'd be covered in there.

[zomgw00t]

I don't have the module myself, but I'm pretty confident doctoranalog is correct. Does it happen to be labelled 'JTAG'?

[Orbless]

I was just at my studio and took some pictures, I didn't check the labeling, but there was not any noticeable label next to it.
Here are the pics.

[davebr]

I'd bet dollars-to-donuts that those aren't jumpers, but instead that's the programming port for the Atmel microprocessor.

That is the programming port for the AVR processor. It is the 10 pin ISP programming port.

At one time I was exchanging emails with him to modify the code so the time controls would be more of a log control for better control of small time increments. Sadly we never completed this so I could update the UEG program through these pins. I still think it is a much needed enhancement.

Dave

[doctorvague]

At one time I was exchanging emails with him to modify the code so the time controls would be more of a log control for better control of small time increments. Sadly we never completed this so I could update the UEG program through these pins. I still think it is a much needed enhancement.

Dave

Too bad, that would have been a welcome improvement. Those time controls are way touchy at the quick end of the scale.

[davebr]

At one time I was exchanging emails with him to modify the code so the time controls would be more of a log control for better control of small time increments. Sadly we never completed this so I could update the UEG program through these pins. I still think it is a much needed enhancement.

Dave

Too bad, that would have been a welcome improvement. Those time controls are way touchy at the quick end of the scale.

It's not that hard to do and the AVR inputs are 10 bits so input values are in the range of 0-1023. I have done both a two segment and three segment linear approximation and both work well. The three segment transform feels quite smooth. I made them simple so I could do word integer math in assembly.

Two segment transform:
newval = [inval / 2] for inval in the range of 0 to 682
newval = [(2 x inval) – 1023] for inval in the range of 683 to 1023

Three segment transform:
newval = [inval / 2] for inval in the range of 0 to 511
newval = [inval – 256] for inval in the range of 512 to 767
newval = [(2 x inval) – 1023] for inval in the range of 768 to 1023

Dave

[tIB]

Would be a good upgrade, at least to have the option.

[Dave Peck]

Too bad, that would have been a welcome improvement. Those time controls are way touchy at the quick end of the scale.

Would connecting a DC voltage to the TCV input help this? It wouldn't work if you need both very short and max length steps at the same time from different steps, but if you don't also need the long times, wouldn't it make it easier to make settings at the quick end of the scale by allowing you to get greater knob travel for the same range of quick ramp time settings?

[Orbless]

Good to know, I have been trying to to figure out what what going on there

[tIB]

Too bad, that would have been a welcome improvement. Those time controls are way touchy at the quick end of the scale.

Would connecting a DC voltage to the TCV input help this? It wouldn't work if you need both very short and max length steps at the same time from different steps, but if you don't also need the long times, wouldn't it make it easier to make settings at the quick end of the scale by allowing you to get greater knob travel for the same range of quick ramp time settings?

Good idea.