Hi,
I have a problem with serial line. We are using PC to read 4 x RS485 on
115kbps. We was using linux and we had serial line overrun when we start
X-windows and when we copy large file from one harddisk on primery IDE
to second harddisk on secondery IDE. We changed our program to real-time
linux and change driver for serial coms to hard irq and use rtl-fifo to
save the data on disk.
We still have overrun when the large file is copy from one disk to
onother disk from primary IDE to secondary IDE. We didnot have this
problem with older PC motherbords. It is very interesting because we are
using communication card with 16 byte FIFO, so the time when the
interrupt is disabled (by what?) is 0.00125s!!
Do you know where is the problem and what to do to remove it?
Thanx
Petr
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