19.10 Data Queue Information (dataqueue[])

Here, each data queue is defined.

Format

Parentheses < >show the user input part.

dataqueue[ <1. ID number> ] { name = <2. ID name (name)>; buffer_size = <3. Data count (buffer_size)>; wait_queue = <4. Wait queue attribute (wait_queue)>; };

1 ) ID number

- Description
Define the data queue 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 ) Data count (buffer_size)

- Description
Define the number of data that the data queue can be stored.

- Definition format
Numeric value

- Definition range
From 0 to 65535

- When omitting
The set value in the default system configuration file (factory setting: 0) applied.

4 ) Wait queue attribute (wait_queue)

- Description
Define the wait queue attribute for sending.
Note, task wait queue for receiving is managed in FIFO order.

- Definition format
Symbol

- Definition range
Select either of the following:

TA_TFIFO: FIFO order

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

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