On Tue, Mar 08, 2011 at 10:44:56AM +0100, Niclas Karlsson wrote: > Do anyone know why I read so many zeroes?
You're probably reading values faster than the chip supports. Check the chip documentation for a maximum readout frequency or a ready flag. > I have made some printk in ads7846.c to trace the problem. It seemed to > read more correct values when I added the printks. A printk takes quite some time on an ARM like yours. The throttle makes it work... David P.S.: you're lucky to not get crap values - seems they got the chip design right... ------------------------------------------------------------------------------ Colocation vs. Managed Hosting A question and answer guide to determining the best fit for your organization - today and in the future. http://p.sf.net/sfu/internap-sfd2d _______________________________________________ spi-devel-general mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/spi-devel-general
