240
3. Selecting a data queue waiting queue
[( Definition format )]
Symbol
[( Definition range )]
TA_TFIFO
or
TA_TRPI
[( Default value )]
TA_TFIFO
Select a method in which tasks wait for short data queue transmission. If TA_TFIFO is selected, tasks are en-
queued in order of FIFO. If TA_TPRI is selected, tasks are enqueued in order of priority beginning with the one
that has the highest priority.
[( Mailbox definition )]
This definition must always be set when the mailbox function is to be used.
<< Format >>
// Mailbox Definition
mailbox[
ID No.
]{
name
=
ID name
;
wait_queue
=
Select mailbox waiting queue
;
message_queue
=
Select message queue
;
max_pri
=
Maximum message priority
;
};
:
:
The ID number must be in the range 1 to 255. The ID number can be omitted. If omitted, ID numbers are automatically
assigned in order of numbers beginning with the smallest.
<< Content >>
For each mailbox ID number, define the items described below.
1. ID
name
[( Definition format )]
Symbol
[( Definition range )]
None
[( Default value )]
None
Define the name by which the mailbox is specified in a program.
2. Select mailbox waiting queue
[( Definition format )]
Symbol
[( Definition range )]
TA_TFIFO
or
TA_TPRI
[( Default value )]
TA_TFIFO
Select a method in which tasks wait for the mailbox. If TA_TFIFO is selected, tasks are enqueued in order of
FIFO. If TA_TPRI is selected, tasks are enqueued in order of priority beginning with the one that has the highest
priority.
3. Select message queue
[( Definition format )]
Symbol
[( Definition range )]
TA_MFIFO
or
TA_MRPI
[( Default value )]
TA_MFIFO
Select a method by which a message queue of the mailbox is selected. If TA_MFIFO is selected, messages are
enqueued in order of FIFO. If TA_MPRI is selected, messages are enqueued in order of priority beginning with
the one that has the highest priority.
