Embedded Systems Design, 2nd Edition

400 Embedded systems design

Given that MS-DOS was to be used, how were the real-time

aspects of the design to be implemented, such as the data sampling

scheduling and perhaps more importantly, how the system would

respond when no data was received? This would be the next set of

design decisions to be made.

Deriving real-time performance from a non-real-

time system

Before this can be tackled, the first step is to quantify the

real-time performance that is needed and from that determine the

level of processing power needed. Real-time means guaranteeing

that work will be completed within a certain time period. That

time period could be seconds or minutes ...