RTOS for IoT （Scorpius）
Multi-task Real-Time OS for
Scorpius is an ITRON-like real-time operating system.
High-speed task scheduling operation is provided with small-code size, making this operating system perfect for the needs below.
- To run multi-tasking on small embedded devices such as IOT devices where code size and memory limitations are critical
- To run high-speed task switching even with a powerless CPU
- To implement a multi-task environment without high-level knowledge about OS
- To implement power saving functions that are essential for IoT devices
- To implement a security function to IoT device
- To monitor and check a status of internal operations of the system such as task transitions.
- To consider some technical support for future expansion of software and execution analysis
| || |
|Kernel Code Size（Note 2）||0.95 KBytes (task functions only) to 2.5 KBytes (all functions)|
|Memory size for Each Task management||Approximately 80 Bytes（Note 3）|
|Task Dispatch Time||4.2 us（Note 4） with ARM7/40 MHz, 1 us with Cortex-M3/80 MHz|
|Supported Service Calls（Note 5）||Task, Semaphore, Event Flag, Mailbox, Trace Log, Energy Saving（Note 6） , Memory Pool（Note 6） , Security（Note 6）|
|Trace Log Function||Compatible with TOPPERS Project trace log viewer TraceLogVisualizer（Note 7）|
- Nios II (Standard)
- Source code
- User’s manual
- Reference environment
- Silicon Labs EFM32TM Pearl Gecko Starter Kit
- Silicon Labs EFM32TM Giant Gecko Starter Kit
- Analog Devices ADuCM320 Evaluation Board
- Terasic MAX ® 10 Nios II Embedded Evaluation Kit
Example Task Transition Display Using TraceLogVisualizer
(Note 1) Measured time required for dispatch processing (task context switching) at Cortex-M3/80 MHz operation.
(Note 2) Compilation result for ARM7 core using Macnica environment.
(Note 3) Memory area size required for every addition of a task.
(Note 4) In the case of typical commercially available RTOS supporting similar CPUs, task dispatch time is around 5 us at 60 MHz
(Note 5) Kernel can be created with minimum required functions only.
(Note 6) Support planned in near future.
(Note 7) Refer to http://www.toppers.jp/en/index.html
(Note 8) Trace log function may change overall system processing order.
(Note 9) Requires implementation of a timer function.
(Note 10) Displays execution time including the trace log function code.