Am Sa 26. April 2008 schrieb Werner Almesberger: > [EMAIL PROTECTED] wrote: > > Remove connections? Never! Maybe remove a whole layer, so it's worth it, but > > some connections... :-/ > > Heh, you gotta start somewhere or that layer will never come off ;-)
XD > > > We have to plan for _some_ maximum. 64? 256? Drop some of them later no > > problem. This is our core-design! > > Hmm, one of the many early design proposals looked like Suzhou at night > (think Las Vegas, just better illumination), so I suspect the "worst > case" number of LEDs may be relatively large. However, we may equally > well go in the opposite direction, and just not have all that glitter. > This is really a decision that will eventually come from our designers. > > If *I* was designing a phone in a shape similar to GTA01/02, GTA04 probably will be quite different > it would > have between zero and one strategically placed dual- or tri-color LEDs > for indications, plus however many single-color LEDs it takes to > illuminate the buttons at night. I also find it difficult to imagine > doing something other than a pure gimmick in such a phone with more > than 6-8 effectively placed LEDs. > > So I'd say 16 "soft-PWM" channels (that's 2 channels per dual-color > LED, 3 for a tri) should be plenty and 8 still very reasonable. But > don't kill me if they end up wanting a 100x100 matrix, each LED with > its own hardware PMW ;-) So for this *I* would suggest an I2C device with it's own driver inside, maybe a modified dot-matrix-dislay > > As usual, it's safer to err towards having too many pins than too few. That's why I ask :-) > If we end up not using some or all of them, we can still try to just > run them to test points and let other people figure out some use for > them. YEP. Thanks for this. We'll make a plan for something from 16 to 64 diodes, 2 or 3 color each. Depends on MSP430 I think. /j
