20.13 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 cfg600px assigns the ID number automatically.

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.