Renesas M3T-MR100 Manuel d'utilisateur télécharger pdf (Page 274)

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9. Sample Program Description

9.1 Overview of Sample Program

As an example application of MR100, the following shows a program that outputs a string to the standard output device

from one task and another alternately.

Table 9.1 Functions in the Sample Program

Function

Name

Type ID No. Priority Description

main() Task 1 1 Starts task1 and task2.

task1() Task 2 2 Outputs "task1 running."

task2() Task 3 3 Outputs "task2 running."

cyh1() Handler 1 Wakes up task1().

The content of processing is described below.

• The main task starts task1, task2, and cyh1, and then terminates itself.

• task1 operates in order of the following.

1. Gets a semaphore.

2. Goes to a wakeup wait state.

3. Outputs "task1 running."

4. Frees the semaphore.

• task2 operates in order of the following.

1. Gets a semaphore.

2. Outputs "task2 running."

3. Frees the semaphore.

cyh1 starts every 100 ms to wake up task1.

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Renesas M3T-MR100 Manuel d'utilisateur Page 274

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