Am Montag, den 02.04.2007, 08:52 +0200 schrieb Richard Cochran: > > This is needed for machines where the hardware timer is based on a > > decrementer. But for machines with a free-running counter and a match > > register, reading the value of the free-running counter is > > simpler. IXP425 is in the "free-running counter and match register > > category". So, its implementation should look like the one of the PXA. > > The IXP425 does not have a match register, AFAICT. > > It does have four 32-bit counters clocked at 66.66 MHz: a watch dog, a > free-running timestamp, and two general purpose timers. > > The general purpose timers may be used either as one-shot timers > (count down to zero and stop) or as periodic times (count down, > automatically reload, and keep going). > > I already have xenomai running on the IXP425, but I will have to take > a closer look at the timer code. > > Richard
Then you have to implement it like I described. Take a look at the implementation for integrator-platforms. (Timer with wraparound) - Manfred Schlaegl
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