I'm using PPC860, VxWorks 5.4.2.

I've got a some problem using the VxWorks ethernet(CPM) SCC1 device.
When I run my application, sometimes VxWorks ethernet(CPM) device is
not working.

At first it's OK, but it happened as time goes by and that couldn't
wake up.

SCC1 RxBD(TxBD) is working well, but TxBD(RxBD) is not working

Is that any the CPM device driver problem?
or some applications crash the CPM device driver?

Thanks in advance,

H.S. Park.