twai_flg
MOVW AX, #tmout_hi PUSH AX MOVW AX, #tmout_lo PUSH AX MOVW DE, #LOWW(_p_flgptn) MOVW BC, #waiptn MOVW AX, #(flgid | wfmode) CALL !!_twai_flg addw sp, #0x0004 |
This service call checks whether the bit pattern specified by parameter waiptn and the bit pattern that satisfies the required condition specified by parameter wfmode are set to the eventflag specified by parameter flgid.
If the bit pattern that satisfies the required condition has been set to the target eventflag, the bit pattern of the target eventflag is stored in the area specified by parameter p_flgptn.
If the bit pattern of the target eventflag does not satisfy the required condition when this service call is issued, the invoking task is queued to the target eventflag wait queue.
As a result, the invoking task is unlinked from the ready queue and is moved from the RUNNING state to the WAITING state (waiting state for an eventflag).
The waiting state for an eventflag is cancelled in the following cases, and then moved to the READY state.
A bit pattern that satisfies the required condition was set to the target eventflag as a result of issuing set_flg.
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A bit pattern that satisfies the required condition was set to the target eventflag as a result of issuing iset_flg.
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- wfmode = TWF_ANDW
Checks whether all of the bits to which 1 is set by parameter waiptn are set as the target eventflag.
Checks whether all of the bits to which 1 is set by parameter waiptn are set as the target eventflag.
- wfmode = TWF_ORW
Checks which bit, among bits to which 1 is set by parameter waiptn, is set as the target eventflag.
Checks which bit, among bits to which 1 is set by parameter waiptn, is set as the target eventflag.
Note 1 In the RI78V4, the number of tasks that can be queued to the eventflag wait queue is one. If this service call is issued for the eventflag to which a task is queued, therefore, "E_ILUSE" is returned regardless of whether or not the required condition is immediately satisfied.
Note 2 The RI78V4 performs bit pattern clear processing (0x0 setting) when the required condition of the target eventflag (TA_CLR attribute) is satisfied.