17.5.6 Mutex information
The number of items that can be defined as mutex information is limited to one for each ID number.
The following shows the mutex information format.
CRE_MTX (mtxid, { mtxatr, ceilpri });
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The items constituting the mutex information are as follows.
Specifies the ID number for a mutex.
A value from 0x1 to 0xff, or a name, can be specified for
mtxid.
Note When a name is specified, the CF850V4 automatically assigns an ID number.
The CF850V4 outputs the relationship between a name and an ID number to the system information header file in the following format:
#define mtxid value
Specifies the task queuing method for a mutex.
The keyword that can be specified for
mtxatr is TA_TFIFO or TA_TPRI.
TA_TFIFO: Task wait queue is in FIFO order.
TA_TPRI: Task wait queue is in task priority order.
3 ) Reserved for future use:
ceilpri
System-reserved area.
Only values from "0x1 to maximum task priority
maxtpri defined in
Basic information" can be specified for
ceilpri.