Renesas M3T-MR100 Instrukcja Użytkownika Pobierz pdf (Strona 114)

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5.3 Synchronization & Communication Function (Semaphore)

Specifications of the semaphore function of MR100 are listed in Table 5.5.

Table 5.5 Specifications of the Semaphore Function

No. Item Content

1 Semaphore ID 1-255

2 Maximum number of resources 1-65535

TA_FIFO: Tasks enqueued in order of FIFO

3 Semaphore attribute

TA_TPRI: Tasks enqueued in order of priority

Table 5.6 List of Semaphore Function Service Call

System State

No. Service Call Function

T N E D U L

1 sig_sem

[S][B]

O O O O

2 isig_sem

[S][B]

Releases semaphore resource

O O O O

3 wai_sem

[S][B]

Acquires semaphore resource O O O

4 pol_sem

[S][B]

O O O O

5 ipol_sem

Acquires semaphore resource(polling)

O O O O

6 twai_sem

[S]

Acquires semaphore resource(with timeout) O O O

7 ref_sem O O O O

8 iref_sem

References semaphore status

O O O O

Notes:

• [S]: Standard profile service calls

[B]: Basic profile service calls

• Each sign within " System State " is a following meaning.

♦ T: Can be called from task context

♦ N: Can be called from non-task context

♦ E: Can be called from dispatch-enabled state

♦ D: Can be called from dispatch-disabled state

♦ U: Can be called from CPU-unlocked state

♦ L: Can be called from CPU-locked state

1 2 ... 109 110 111 112 113 114 115 116 117 118 119 ... 303 304

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