19.11 Mailbox Information (mailbox[])

Here, each mailbox is defined.

Format

Parentheses < >show the user input part.

mailbox[ <1. ID number> ] { name = <2. ID name (name)>; wait_queue = <3. Wait queue attribute (wait_queue)>; message_queue = <4. Message queue attribute (message_queue)>; max_pri = <5. Maximum message priority (max_pri)>; };

1 ) ID number

- Description
Define the mailbox ID number.

- Definition format
Numeric value

- Definition range
From 1 to 255

- When omitting
The cfg600 assigns the ID number automatically.

- Note
The ID numbers must be assigned without an omission beginning with 1. Therefore, when specifying an ID number, be sure that the specified value is equal to or less than the number of objects defined.

2 ) ID name (name)

- Description
Define the ID name. The specified ID name is output to the system information header file (kernel_id.h) in the form of the following.

 #define   <ID name>   <ID number>

- Definition format
Symbol

- Definition range
-

- When omitting
Cannot be omitted.

3 ) Wait queue attribute (wait_queue)

- Description
Define the wait queue attribute.

- Definition format
Symbol

- Definition range
Select either of the following:

TA_TFIFO: FIFO order

TA_TPRI: Task priority order
Among tasks with the same priority, they are queued in FIFO order.

- When omitting
The set value in the default system configuration file (factory setting: TA_TFIFO) applied.

4 ) Message queue attribute (message_queue)

- Description
Define the message queue attribute.

- Definition format
Symbol

- Definition range
Select either of the following:

TA_MFIFO: The order of the message transmission request.

TA_MPRI: Message priority order

- When omitting
The set value in the default system configuration file (factory setting: TA_MFIFO) applied.

5 ) Maximum message priority (max_pri)

- Description
When TA_MPRI is specified for message_queue, the message priority from 1 to max_pri can be used.
When TA_MFIFO is specified for message_queue, this item is only disregarded.

- Definition format
Numeric value

- Definition range
From 1 to Maximum message priority (message_pri) in System Information (system)

- When omitting
The set value in the default system configuration file (factory setting: 1) applied.