Embedded microcomputer software structure

[Baxter Burgundy]

Again not homework, but help with revision. I've got the following question I'm not really sure on, kind of similar to the other I posted last night:

(c) An embedded microcomputer based instrument is to be designed around the following three principal tasks:

• A user interface using a keyboard & LCD
• Multi-drop serial communications that principally retrieves data from the instrument
• Periodic recording of 2 analogue values every 10ms

Design a suitable software structure for the above application giving details of any interrupts necessary to generate reliable communications & data without inducing noticeable time delays when using the instrument.

Cheers

 

[Arouse1973]

Sounds like a job for RS485. They don't give you much info do they? So is the data and the analogue values the same thing or separate?
Adam

 

[Baxter Burgundy]

The focus of the module has been on the PIC 16F877 so I think they'll be wanting the answer centered around that. The way it reads I would assume the data and the analogue values to be the same thing.