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Technical Support
On-Line Manuals
RL-ARM User's Guide (MDK v4)
RL-RTX
Overview
Product Description
Product Specification
Technical Data
Timing Specifications
Advantages
Your First RTX Application
Theory of Operation
Timer Tick Interrupt
System Task Manager
Task Management
Idle Task
System Resources
Scheduling Options
Pre-emptive Scheduling
Round-Robin Scheduling
Cooperative Multitasking
Priority Inversion
Stack Management
User Timers
Interrupt Functions
Configuring RL-RTX
Configuration Options
Tasks
Stack Size
Stack Checking
Run in Privileged Mode
Hardware Timer
Round-Robin Multitasking
User Timers
FIFO Queue Buffer
Idle Task
Error Function
Create New RTX_Config.c
Configuration Macros
Alternate Tick Timer
Low Power RTX
Library Files
Using RL-RTX
Writing Programs
Include Files
Defining Tasks
Multiple Instances
External References
Using a Mailbox
SWI Functions
SVC Functions
Debugging
System Info
Task Info
Event Viewer
Usage Hints
ARM7/ARM9 Version
Cortex-M Version
Create New RTX Application
Function Reference
Event Flag Management Routines
Mailbox Management Routines
Memory Allocation Routines
Mutex Management Routines
Semaphore Management Routines
System Functions
Task Management Routines
Time Management Routines
User Timer Management Routines
RL-FlashFS
RL-TCPnet
RL-CAN
RL-USB
Example Programs
Library Reference
Appendix
System Resources
RTX kernel tasks are identified by their Task Control Block (TCB). This is a dynamically allocated block of memory where all task control and status variables are located. TCB is allocated at runtime when the task is created with the os_tsk_create or os_tsk_create_user function call.
The size of the TCB memory pool is defined in the RTX_Config.c configuration file, and it depends on the number of concurrent running tasks. This is not necessarily the number of defined tasks since multiple instances of a task are supported by the RTX kernel.
The RTX kernel also allocates the task its own stack. The stack is allocated at runtime after the TCB has been allocated. The pointer to the stack memory block is then written into the TCB.
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