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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
Timing Specifications
| Function | ARM7™/ARM9™ (cycles) |
Cortex™-M (cycles) |
|---|---|---|
| Initialize system (os_sys_init), start task | 1721 | 1147 |
| Create task (no task switch) | 679 | 403 |
| Create task (switch task) | 787 | 461 |
| Delete task (os_tsk_delete) | 402 | 218 |
| Task switch (by os_tsk_delete_self) | 458 | 230 |
| Task switch (by os_tsk_pass) | 321 | 192 |
| Set event (no task switch) | 128 | 89 |
| Set event (switch task) | 363 | 215 |
| Send semaphore (no task switch) | 106 | 72 |
| Send semaphore (switch task) | 364 | 217 |
| Send message (no task switch) | 218 | 117 |
| Send message (switch task) | 404 | 241 |
| Get own task identifier (os_tsk_self) | 23 | 65 |
| Interrupt lockout | <160 | 0 |
Note
- The table for ARM7™/ARM9™ RTX Kernel library is measured on LPC2138 (ARM7), code execution from internal flash with zero-cycle latency.
- The table for Cortex™-M RTX Kernel library is measured on LPC1768 (Cortex-M3), code execution from internal flash with zero-cycle latency.
- The RTX Kernel for the test is configured for 10 tasks, 10 user timers and stack checking disabled.
- Interrupt lockout in ARM7™/ARM9™ includes the ISR prolog generated by the compiler.
- The RTX Kernel library for Cortex™-M3/M4 does not disable interrupts. Interrupt lockout for Cortex™-M0/M1 is <20 cycles.
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