Why dooroos. RTOS Requirement 2 A real-time operating system (RTOS) is an operating system (OS) intended to serve real-time application requests.operating.

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Presentation transcript:

Why dooroos

RTOS Requirement

2 A real-time operating system (RTOS) is an operating system (OS) intended to serve real-time application requests.operating systemreal-time A key characteristic of a RTOS is the level of its consistency concerning the amount of time it takes to accept and complete an application's task; the variability is jitter. [1] A hard real-time operating system has less jitter than a soft real-time operating system. The chief design goal is not high throughput, but rather a guarantee of a soft or hard performance category. A RTOS that can usually or generally meet a deadline is a soft real-time OS, but if it can meet a deadline deterministically it is a hard real-time OS.taskjitter [1]throughputsoft or harddeterministically A real-time OS has an advanced algorithm for scheduling. Scheduler flexibility enables a wider, computer-system orchestration of process priorities, but a real-time OS is more frequently dedicated to a narrow set of applications. Key factors in a real-time OS are minimal interrupt latency and minimal thread switching latency, but a real-time OS is valued more for how quickly or how predictably it can respond than for the amount of work it can perform in a given period of time.schedulinginterrupt latencythread switching latency RTOS ?

 RTOS (Real-Time Operating System) 시스템의 응용프로그램이나 드라이버가 하드웨어나 사용자의 요청에 기대되는 시간 내에 응답을 보낼 수 있도록 작성된 운영체제이다. Hardware Porting Operating System 원하는 기능을 하는 응용프로그램을 제 작한다. Operating System ? => 시스템을 제작할 때, 모든 프로그램을 직접 작성하지 않고, 다양한 기능을 할 수 있는 표준 기능을 가지고 있는 일련의 프로그램을 운영체제라 한다. 운영체제는 하드웨어를 직접 접근하지 않고 하드웨어 등을 제어하여 사용자가 원하는 기능을 할 수 있도록 한다. RTOS ?

펌웨어 환경 RTOS 환경 개발 비용 절감 80 % 시스템 안정성 확보 하드웨어 제약 탈피 프로그램 재 사용성 증가 업그레이드 비용 절감 45 ~ 65 % 다양한 기능구현 RTOS 도입효과

완벽한 호환성 제작된 응용프로그램 및 GUI 를 그대로 활용 다시 활용 최상의 성능 유지 시스템의 성능을 RTOS 에서 최상으로 관리, 안정성 유지 관리 비용 절감 새로운 S/W 배포 및 기존 프로그램 Upgrade 시 어플리케이션만 교체로 인한 관리인력 및 비용 절감 A/S 비용 절감 디바이스 드라이버 사용으로 이상 장소 발견 용이 S/W 제작 비용 절감 표준 라이브러리 제공으로 프로그램 제작에 따른 비용 절감 효율적인 개발 관리 표준 플랫폼을 사용하여 여러 프로젝트 동시 개발 가능 RTOS 도입효과

dooroos history

app1 app NANO KERNEL TIME SERVER SYSTEM SERVER SYNC SERVER DEVICE SERVER FILESYSTEM SERVER WINDOW SERVER NETWORK SERVER NANO-KERNEL MICRO-KERNEL MACRO-KERNEL dooroos.realtime Structure DRV DLL apps

H/W HAL USB M/S LCD KBD Synchronization server Time server System server Nano-kernel DEVICE SERVER FILESYSTEM SERVER WINDOW SERVER GRAPHIC LIBRARY (DLL) FAT 12/16/32 ROM RAM library (DLL) APPLICATION JFTL (DRV) FLASH Sound NETWORK SERVER NETWORK PROTOCOL NetDrvs LOADER SERVER UART Mixer TOUCH cpu core DLL dooroos.realtime BlockDiagram

V.S dooroos Linux/android

OS Comparison dooroos.realtimeLinuxWindows CE structure modulemonolithicmixed filesystem supported IO system supported windowing supported networking supported library Not enoughenough apps Not enoughenough Memory (Min/Recommended) 500KB/16MB 16MB / 128MB (64MB / 256MB : android) 16MB / 128MB royalty ~ 2,000 won(1.5$)Free / android ()16$

Why dooroos