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DACS: Digital Control Bus | 
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Next: Physical Specifications Up: Inter-Module Specifications Previous: Audio Signal Distribution Contents Digital Control BusThe modular design of the DACS subsystems begs for a flexible means of connecting a variety of PC boards together such that the internal microcontroller ( C ) may communicate with them. Thus, a
``pseudo-bus'' (dubbed the Pbus ) is defined, to be generated by the
C . The Pbus is a master-slave type of bus, where the master is the
microcontroller board, and the slaves are the various devices
connected to the bus. The signal levels on the bus are standard TTL
levels.
To remove any confusion, it should be noted that the Pbus
is not the same as the C bus, but is rather built on top of
the underlying C bus structure. This abstraction layer
allows many different types of controllers to act as Pbus masters,
thus allowing a virtually limitless choice of microcontrollers and
microprocessors.
Additionally, simple PC-hosted hardware can be constructed to allow
easy Pbus development, testing and debugging. A simple, but
extraordinarily useful PC-hosted bus-snooper will likely be constructed
in order to aid later firmware debugging tasks.
Subsections
Steve Richardson 2000-07-06 |
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