i'm using XScale PXA270 processor with latest eCos and I think I found
a
problem with DSR's. I'm 100% sure that there must be a condition
where eCos
not calls the DSR of an interrupt. I have a IRQ which comes 45 times a
second on a system running at high load. After more then 10 hours
one DSR
is missing. This is a bad situation which makes the system unstable.
Is this problem known? Maybe it depends only on the architecture
(ARM).
Does the ISR reenable the interrupt? It could be the next interrupt
arrives before the DSR is called. In that case the DSR will be called
with the count value of 2.
No. The interrupts will not be disabled at any time. The interrupt from
this source will only be acknowledged in the isr function.
The functionality is simple. A hardware unit will be started and reports
the finish with an interrupt. I have made a counter on hardware unit
start,
isr and dsr. After this long-run test, the dsr counter is one less than
the
other counters.
Did you bother to read the manual? Here is citation:
"""
void
dsr_function(cyg_vector_t vector,
cyg_ucount32 count,
cyg_addrword_t data)
{
}
[...] The second argument indicates the number of these interrupts
that have occurred and for which the ISR requested a DSR. Usually this
will be 1, unless the system is suffering from a very heavy load.
"""
Thus, you need to increment your test counter by the value of 'count'
argument in the DSR handler, do you?