Finite State-Machines example in Chapter 2

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Glenn Erickson

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Aug 7, 2015, 10:34:05 PM8/7/15
to PIC24 Assembly-to-C Book
While a pain in the A__ to decipher, I finally "got it"  Perhaps it was to save time but a graphic of the logic for ONE Dout MIGHT have shortened the comprehension-time.  You all might also give a reason FOR such a circuit, otherwise it is only an interesting piece of trivia.  I fail to see how it actually applies to programming  microcontroller.

Robert Reese

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Aug 8, 2015, 1:07:57 PM8/8/15
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So, this chapter is a "Newbie Introduction to Computer Architecture" -- our students coming into this course have had computer programming courses and a digital logic course, but they do not know much about computer architecture. They do not know about instructions, machine code, memory, fetch/execute cycle etc. This chapter shows them how to build a very simple "computer' that has memory, fetches/executes instructions etc.  This way, they are familiar with these concepts before the next chapter that introduces the PIC24 instructions/architecture.

If a reader is already familiar with these concepts, then this chapter can be skipped. For our students, it serves as a useful bridge from the digital logic course to this course. This shows them how to use their digital logic skills to build this simple 'computer'.

Bob Reese



On Thu, Aug 6, 2015 at 6:11 PM, Glenn Erickson <gerick...@gmail.com> wrote:
While a pain in the A__ to decipher, I finally "got it"  Perhaps it was to save time but a graphic of the logic for ONE Dout MIGHT have shortened the comprehension-time.  You all might also give a reason FOR such a circuit, otherwise it is only an interesting piece of trivia.  I fail to see how it actually applies to programming  microcontroller.

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