10
•
HSLink Introduction
And, the following graph shows working theory of
gathering input
information
.
Figure 1.9: HSLink technology brief-2
The only one teacher (the master) sends the message ”No.#, what’s your
newest input status” to all students, and the very student (slave NO.#) gives
his answer. Then, teacher writes the answer on the blackboard (RAM on
master cards). If someone (user’s AP) is interested in some slave’s newest
input status, he just looks up the blackboard. All input information is
presented there.
The two procedures above will take turn and repeat for every slave module.
And after a cycle, every slave module sets its newest output status and
master gathers every slave module’s newest input information in the
memory. We simulate the polling communication cycle by the following
personalized conversation of teacher and student:
Memory
NO 1
................
................
NO 2
................
................
NO 45
................
................
Master
Slaves I/O Modules
NO 45,what's
your input
status,now
I,No 45. My input
status is ......
Output value of every slaves
