CooCox CoOS
CooCox CoOS is an embedded real-time multi-task OS specially for ARM Cortex M series.
CoOS Features:
- Free and open real-time Operating System
- Specially designed for Cortex-M series
- Scalable, minimum system kernel is only 974Bytes
- Adaptive Task Scheduling Algorithm.
- Supports preemptive priority and round-robin
- Interrupt latency is next to 0
- Stack overflow detection option
- Semaphore, Mutex, Flag, Mailbox and Queue for communication & synchronisation
- Supports the platforms of ICCARM, ARMCC, GCC
Technical Data:
| N Function |
Time ( No Robin/Robin ) |
| Create defined task, no task switch |
5.3us / 5.8us |
| Create defined task, switch task |
7.5us / 8.6us |
| Delete task (ExitTask) |
4.8us / 5.2us |
| Task switch (SwitchContext) |
1.5us / 1.5 us |
| Task switch (upon set flag) |
7.5us / 8.1us |
| Task switch (upon sent semaphore) |
6.3us / 7.0us |
| Task switch (upon sent mail) |
6.1us / 7.1us |
| Task switch (upon sent queue) |
7.0us / 7.6us |
| Set Flag (no task switch) |
1.3us / 1.3us |
| Send semaphore (no task switch) |
1.6us / 1.6us |
| Send mail (no task switch) |
1.5us / 1.5us |
| Send queue (no task switch) |
1.8us / 1.8us |
| Maximum interrupt lockout for IRQ ISR's |
0 / 0 |
| Description |
Space |
| RAM Space for Kernel |
168 Bytes |
| Code Space for Kernel |
974 Bytes |
| RAM Space for a Task |
TaskStackSize + 24 Bytes(MIN) |
| TaskStackSize + 48 Bytes(MAX) |
| RAM Space for a Mailbox |
16 Bytes |
| RAM Space for a Semaphore |
16 Bytes |
| RAM Space for a Queue |
32 Bytes |
| RAM Space for a Mutex |
8 Bytes |
| RAM Space for a User Timer |
24 Bytes |
* The data for CoOS kernel is measured for STM32F103RB CPU with the system clock setting to 72 MHz, code execution from internal flash, with Flash Latency 2 wait states and the Prefetch Buffer enabled.
User's Guide:
We have supplied user's guide to help you to use CooCox CoOS more easily and confidently, which includes:
- Chapter 1 CooCox CoOS Overview
- Chapter 2 Task Management
- Chapter 3 Time Management
- Chapter 4 Memory Management
- Chapter 5 Intertask Synchronization & Communication
- Chapter 6 API Reference
To get the details, please download  CooCox CoOS User's Guide.
Examples:
CoOS also provides some examples to help you to develop embedded applications based on CoOS more easily, as follows:
Using ARMCC compiler:
Using ICCARM compiler:
Using GCC compiler:
Application Solutions:
CooCox provides some application solutions based on CoOS for your reference, you can use it directly and conveniently.
Supported Devices:
CoOS supports all ARM Cortex M4, M3 and M0 based devices, here only lists some of the most common used:
Download CoOS Source Code:
* If you have already installed CooCox CoCenter, you could download the software through your local CoCenter.
|
CoOS V1.1.4 2012-6-13
 Nuvoton NUC122RD2AN Example
- Nuvoton Mini54LAN Example
|
Examples & Solutions
Task
Semaphores
