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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
Technical Data
| Description | ARM7™/ARM9™ | Cortex™-M |
|---|---|---|
| Defined Tasks | Unlimited | Unlimited |
| Active Tasks | 250 max | 250 max |
| Mailboxes | Unlimited | Unlimited |
| Semaphores | Unlimited | Unlimited |
| Mutexes | Unlimited | Unlimited |
| Signals / Events | 16 per task | 16 per task |
| User Timers | Unlimited | Unlimited |
| Code Space | <4.2 Kbytes | <4.0 Kbytes |
| RAM Space for Kernel | 300 bytes + 80 bytes User Stack |
300 bytes + 128 bytes Main Stack |
| RAM Space for a Task | TaskStackSize + 52 bytes | TaskStackSize + 52 bytes |
| RAM Space for a Mailbox | MaxMessages * 4 + 16 bytes | MaxMessages * 4 + 16 bytes |
| RAM Space for a Semaphore | 8 bytes | 8 bytes |
| RAM Space for a Mutex | 12 bytes | 12 bytes |
| RAM Space for a User Timer | 8 bytes | 8 bytes |
| Hardware Requirements | One on-chip timer | SysTick timer |
| User task priorities | 1 - 254 | 1 - 254 |
| Task switch time | <5.3 µsec @ 60 MHz | <2.6 µsec @ 72 MHz |
| Interrupt lockout time | <2.7 µsec @ 60 MHz | Not disabled by RTX |
Note
- Unlimited means that the RTX kernel does not impose any limitations on the number. However, the available system memory resources limit the number of items you can create.
- The default configuration of the RTX kernel allows 10 tasks and 10 user timers. It also disables stack checking by default.
- In the RTX kernel, Event is simply another name for signal.
- RAM requirements depend on the number of concurrently running tasks.
- The code and RAM size was calculated for MicroLib runtime library.
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