Great question because the answer is somewhere between 6 and 7 bits - lol. But seriously, the digital pot's are either 100 or 128 bit resolution. Can't remember exactly, I'll check the doc's tonight. The code is going to be interesting because the wipers are clocked up and down and there's no way to read their positions. So the position has to be stored by the CPU in memory and then the pot's have to be clocked up and down according to the difference between existing set position and the new required position. These little 8 pin chips are really designed for car radio volume controls or similar applications. The challenge will be to make sure that the code keeps the pot's very responsive while also not slowing down things when a big pot sweep change occurs. So let's say we send a MIDI controller that sweeps from 0 to 99 in one message then we'll have to slow the sweep down a bit perhaps only clocking up 10 pot positions in a single interrupt cycle. So ten interrupts will be required to get the pot to it's final end position. That should be quite OK because the joystick A/D conversion code works in the same way where it takes 16 hardware interrupts to do a full conversion of both the X and Y axis. In this configuration, I still can't "hear" any slowness in the MG or bend joystick responsiveness. Mike. --- In korgpolyex@yahoogroups.com, Atom Smasher <atom@...> wrote: > > somewhat off topic, but what will be the resolution of the software > control over the hardware mods? 6 or 7 bit? > > > -- > ...atom > > ________________________ > http://atom.smasher.org/ > 762A 3B98 A3C3 96C9 C6B7 582A B88D 52E4 D9F5 7808 > ------------------------------------------------- > > "The problem with capitalism is that it best rewards the > worst part of us: the ruthless, competitive, conniving, > opportunistic, acquisitive drives, giving little reward > and often much punishment - or at least much handicap - > to honesty, compassion, fair play, many forms of hard > work, love of justice, and a concern for those in need." > -- Michael Parenti, Land of Idols (1994) >
Message
6 or 7 bits
2008-02-26 by patrioticduo