Hello everybody,
I would like to make a parallel port demux to transfer data from fpga. I wrote
a simple hal component that has one data input signal and 3 select input
signals. And another hal component, a simple binary counter that increment the
output binary signal every base-thread period. I will connect the binary hal
counter signals to external fpga and at the same time to hal demux component.
The problem is that I don’t know at what time are the signals updated. Will the
counter increment before the demux will read data or after that? When is the
parallel port outputs updated – before it the reading of parallel port inputs
of after that? I assume that hal reads parallel port values at the beginning of
every thread and at the end of thread writes the result back to the parallel
port.
Regards
Klemen
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