Introduction to uCOS II v2 6 m1

Introduction to uCOS-II V2.6 About SwiftACT • A Technology services startup company o Under establishment • Areas of specialties: o o Mobile telecommunication services development Embedded systems development • Types of services: o o o o Consultation Managed services Sourcing Training Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 About Me • Graduated 2004 o ECE, ASU: yrs distinction • 5+ years in embedded systems development o SDLC, Apps, MW, DD, Porting, • 3+ years in SW engineering o PSP, CMMI, Systematic reuse, • 3+ years in SW testing o IBM certified, ISTQB certified, Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 Copyright • Materials in this course is the property of Amr Ali Abdel-Naby • Reproduction or transmission of the materials in any manner without the copyright owner permission is a law violation Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 Course References • MicroC/OS-II The Real-Time Kernel, 2nd Edition, by Jean J Labrosse Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 Outline • • • • • • • • • • Introduction to µC/OS-II Kernel Structure Task Management Time Management Semaphore Management Mutual Exclusion Semaphores Event Flag Management Message Mailbox Management Message Queue Management Memory Management Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 Outline • • • • • • • • • • Introduction to µC/OS-II Kernel Structure Task Management Time Management Semaphore Management Mutual Exclusion Semaphores Event Flag Management Message Mailbox Management Message Queue Management Memory Management Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 At the Beginning • Written By J Labrosse o First published in 1992 • µC/OS-II is a trade mark of Micrium • It is pronounced as “micro C OS 2” o Not mucus  • 1000s applications are using it all over the world • A good starting point to experience real-time OS • Simple but yet very powerful Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 µC/OS-II in Literature • Four books were published to explain the internals: o o o o “μC/OS The Real-Time Kernel”, in 1992 “μC/OS-II The Real-Time Kernel”, in 1998 “μC/OS-II The Real-Time Kernel”, Second Edition in 2002 “μC/OS-III The Real-Time Kernel”, in 2009 Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 µC/OS-II History µC/OS V1.08 µC/OS-II V2.00 µC/OS V1.08 + Memory Manager + Stack Checking + CPU Load Checking Amr Ali Abdel-Naby@2010 µC/OS-II V2.52 µC/OS-II V2.86 µC/OS-II V2.00 + Safety Critical + Mutexes + Semaphores + Event Flags µC/OS-II V2.52 + Timers + 250 Tasks + MMU & MPU Introduction to uCOS-II V2.6 µC/OS-III µC/OS-II V2.86 + RR Scheduling + Infinite # of Tasks & Services µC/OS-II Features • • • • • • • • • • • Source code Portable Romable Scalable Preemptive Multitasking Deterministic Task stack Services Interrupt management Robust & reliable Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 Source Code • High quality • Neat • Consistent • Organized • Commented • MISRA-C compliant Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 Portable • Highly portable ANSI C • Assembly is kept minimum • Supports 8-, 16-, 32-, 64- bit processors • Ported over 100 different processors • All ports are freely available at Micrium website Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 Romable • If you have the proper tool chain, it can be embedded into your system • No need for disks Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 Scalable • Use the service you only need o o Very few services  Complete services available A group of #defines determines scalability • Minimum footprint = KB Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 Preemptive • Fully preemptive • Always runs the highest priority task that is ready to run • Comparable with other preemptive kernels ISR Task Y Task X Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 Multitasking • Manages up to 64 tasks • tasks are used by µC/OS-II • 56 tasks are left to applications • A unique task/priority • RR and FIFO are not supported Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 Deterministic • You can always know how much time μC/OS-II will take to execute a service • Execution time is independent of tasks running • The only exceptions are OSTimeTick & some event flag services Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 Task Stacks • Each task has its stack • μC/OS-II allows different stack sizes • Stack checking utility • You can determine & decide how much stack is needed for each task Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 Services • • • • • • • • Semaphores Mutexes Event flags Message queues Mailboxes Fixed size memory partitions Task management Time management Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 Interrupt Management • An interrupt can suspend a task execution • The highest priority ready task runs after serving the interrupt • Nested interrupts o Up to 255 level ISR Task Y Task X Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 Robust & Reliable • Used by many products • Support • Tested & certified in safety critical systems Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 Related Products • • • • • • • • • • µC/Probe µC/TCP-IP µC/FS µC/GUI µC/USB µC/CAN µC/Modbus µC/FL µC/Building Blocks µC/OSEK-VDX Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 µC/OS-II Market • Distributors all over the word • Huge customer list Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 License • Educational o o o Free Universities Non-profitable use • Source Code o If µC/OS will be distributed with your product as a source code • Object Code o If µC/OS will be distributed with your product as a binary • Not royalty free Amr Ali Abdel-Naby@2010 Introduction to uCOS-II V2.6 [...]... Abdel-Naby@2010 Introduction to uCOS- II V2. 6 Robust & Reliable • Used by many products • Support • Tested & certified in safety critical systems Amr Ali Abdel-Naby@2010 Introduction to uCOS- II V2. 6 Related Products • • • • • • • • • • µC/Probe µC/TCP-IP µC/FS µC/GUI µC/USB µC/CAN µC/Modbus µC/FL µC/Building Blocks µC/OSEK-VDX Amr Ali Abdel-Naby@2010 Introduction to uCOS- II V2. 6 µC/OS -II Market • Distributors... footprint = 2 KB Amr Ali Abdel-Naby@2010 Introduction to uCOS- II V2. 6 Preemptive • Fully preemptive • Always runs the highest priority task that is ready to run • Comparable with other preemptive kernels ISR Task Y Task X Amr Ali Abdel-Naby@2010 Introduction to uCOS- II V2. 6 Multitasking • Manages up to 64 tasks • 8 tasks are used by µC/OS -II • 56 tasks are left to applications • A unique task/priority... Assembly is kept minimum • Supports 8-, 16- , 32-, 64 - bit processors • Ported over 100 different processors • All ports are freely available at Micrium website Amr Ali Abdel-Naby@2010 Introduction to uCOS- II V2. 6 Romable • If you have the proper tool chain, it can be embedded into your system • No need for disks Amr Ali Abdel-Naby@2010 Introduction to uCOS- II V2. 6 Scalable • Use the service you only need... not supported Amr Ali Abdel-Naby@2010 Introduction to uCOS- II V2. 6 Deterministic • You can always know how much time μC/OS -II will take to execute a service • Execution time is independent of tasks running • The only exceptions are OSTimeTick & some event flag services Amr Ali Abdel-Naby@2010 Introduction to uCOS- II V2. 6 Task Stacks • Each task has its stack • μC/OS -II allows different stack sizes • Stack... Abdel-Naby@2010 Introduction to uCOS- II V2. 6 Services • • • • • • • • Semaphores Mutexes Event flags Message queues Mailboxes Fixed size memory partitions Task management Time management Amr Ali Abdel-Naby@2010 Introduction to uCOS- II V2. 6 Interrupt Management • An interrupt can suspend a task execution • The highest priority ready task runs after serving the interrupt • Nested interrupts o Up to 255 level...µC/OS -II Features • • • • • • • • • • • Source code Portable Romable Scalable Preemptive Multitasking Deterministic Task stack Services Interrupt management Robust & reliable Amr Ali Abdel-Naby@2010 Introduction to uCOS- II V2. 6 Source Code • High quality • Neat • Consistent • Organized • Commented • MISRA-C compliant Amr Ali Abdel-Naby@2010 Introduction to uCOS- II V2. 6 Portable • Highly... over the word • Huge customer list Amr Ali Abdel-Naby@2010 Introduction to uCOS- II V2. 6 License • Educational o o o Free Universities Non-profitable use • Source Code o If µC/OS will be distributed with your product as a source code • Object Code o If µC/OS will be distributed with your product as a binary • Not royalty free Amr Ali Abdel-Naby@2010 Introduction to uCOS- II V2. 6