Справочник Пользователя для Renesas 70
Chapter 2 General Information
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7. Timer control is made easier.
To perform processing at 10 ms intervals, the microcomputer timer function was formerly used to pe-
riodically initiate an interrupt. However, as the number of usable microcomputer timers was limited,
timer insufficiency was compensated for by, for instance, using one timer for a number of different
processing operations.
riodically initiate an interrupt. However, as the number of usable microcomputer timers was limited,
timer insufficiency was compensated for by, for instance, using one timer for a number of different
processing operations.
When the real-time OS is introduced, however, it is possible to create programs for performing proc-
essing at fixed time intervals making use of the real-time OS time management function without paying
special attention to the microcomputer timer function. At the same time, programming can also be
done in such a manner as to let the programmer take that numerous timers are provided for the mi-
crocomputer.
essing at fixed time intervals making use of the real-time OS time management function without paying
special attention to the microcomputer timer function. At the same time, programming can also be
done in such a manner as to let the programmer take that numerous timers are provided for the mi-
crocomputer.
8. Software maintainability is enhanced
When the real-time OS is put to use, the developed software consists of small program modules called
tasks. Therefore, increased software maintainability is provided because developed software mainte-
nance can be carried out simply by maintaining small tasks.
tasks. Therefore, increased software maintainability is provided because developed software mainte-
nance can be carried out simply by maintaining small tasks.
9. Increased software reliability is assured.
The introduction of the real-time OS makes it possible to carry out program evaluation and testing in
the unit of a small module called task. This feature facilitates evaluation and testing and increases
software reliability.
the unit of a small module called task. This feature facilitates evaluation and testing and increases
software reliability.
10. The microcomputer performance can be optimized to improve the performance of microcom-
puter-based products.
With the real-time OS, it is possible to decrease the number of unnecessary microcomputer operations
such as I/O waiting. It means that the optimum capabilities can be obtained from microcomputers, and
this will lead to microcomputer-based product performance improvement.
such as I/O waiting. It means that the optimum capabilities can be obtained from microcomputers, and
this will lead to microcomputer-based product performance improvement.