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RL-ARM User's Guide
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 RTX Kernel Basic RTX Configuration Tasks Stack Size Stack Checking Run in Privileged Mode Hardware Timer Round-Robin Multitasking User Timers FIFO Queue Buffer Error Function Idle Task Advanced RTX Configuration HW Resources Required Configuration Macros Library Files Using RTX Kernel 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 ARM Version Cortex 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 AppendixTechnical 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 MicoLib runtime library.
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