MIDI with multiple pots

eyeball1

i'm new to this, but i've successfully set up a simple circuit that measures RC time from a potentiometer/capacitor and sends out corresponding MIDI controller data. i want to add potentiometers to the other 14 I/O pins as well, but so far this turns out to be extremely slow. seems like it has to cycle through each of the I/O pins and measure, which means that response time on any one knob is really REALLY lagging. no good for performance situations. is this just a limitation of the chip & BASIC, or is there some code out there that would drasticly improve my situation?

my code is a simplified version of this code:
http://www.interaccess.org/arg/arg-knowledge/MIDI.BS2

any help would be very much appreciated!
william

Jon Williams

RCTIME does in fact take... time. Would probably be better served using a couple 8-channel ADC chips, reading them with the Stamp, then sending the appropriate MIDI commands.

SX info: http://www.parallax.com/sx/index.asp

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Jon Williams
Applications Engineer, Parallax

Post Edited (Jon Williams (Parallax)) : 4/12/2006 1:33:23 AM GMT

eyeball1

thanks for the help. i guess there's no way to get around the pins being charged, discharged, and read sequentially? i was hoping that there might be a way to have all pins do the RC thing simultaneously...