Here's the problem: I need to program some hardware via 2 pins of the
PIO (1 clock, 1 data). Timing constraints are tight - 10ms clock cycle
time. All this, of course, whilst I maintain very high level services
(CAN bus, TCP/IP). The downstream unit also ACKS by asserting a PIO pin,
configured as an input, high. So this loop has to both read and write. I
need to send 16 bits in the serial stream.
Is there an established way to do this sort of thing?
I'd much prefer to avoid exotics like RTAI extensions at this stage. I
did once see a reference to user-mode IO which implied a possible
interrupt driven driver but lost track of it.
Any pointers welcomed.
G
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