[Fwd: Re: gta04 / MPU / JTAG]
graeme at openmoko.org
Thu Apr 17 14:15:45 CEST 2008
On Thu, Apr 17, 2008 at 12:18:50PM +0100, Andy Green wrote:
> | It can be good if we can run the touchscreen from MSP430 ADC. Maybe see
> | if you can think that through, we need to use GTA01 style external drive
> | for X and Y when we measure. Maybe internal DMA helps there.
> Forget DMA, AFAICS the A/D is running while cpu sleeping, and we even
> have a
> COMPARATOR! :-)) to irq when a certain analog level is detected! That's
> great! Resistive TS no issue at all.
> OTOH I seen some capacitive TS around those GTA04 modells ?!? Have to ask
> Allen what's the plan here...
This is actually a question I meant to bring up and keep forgetting.
There are numerous complaints from the GUI guys about the gta01/02 TS
varying from jitter to too low resolution.
Someone should investigate the n800/n810 TS that works well with both
finger and stylus. How did they do this trick? Is it just software or
did they do something in hardware.
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