Course M336
uCOSII C Programming on 16 bit and 32 bit
Microchip Microcontrollers (dsPIC, PIC24, PIC32) - Multitasking and
Interprocess Communication Strategies and Patterns
uCOSII C Programming on 16 bit and 32 bit Microchip Microcontrollers (dsPIC, PIC24, PIC32) - Multitasking and Interprocess Communication Strategies and Patterns
Duration: 5 Days
Intended Audience
Attendees should have a knowledge of embedded C programming and an awareness of multi-tasking concepts
Course Overview
This is a 5 day hands on programming course for experienced C programmers. The course will cover the concepts underlying the use of pre-emptive multi-tasking operating systems, using uCOSII and Microchip 16bit and 32 bit processor architectures, the advantages and disadvantages of this approach, the need for careful and thoughtful design. It will cover the standard patterns and issues associated with this paradigm such as pipes and circular buffers, producer - consumer patterns, reader - writer patterns,workcrew patterns, deadlock, livelock and priority-inversion. In addition the fundamentals of topics such as interrupt handling, device driver development, and deployment, configuration and linker scripts, tuning and debugging will be surveyed.
This is a taught course with labs, with a split of about 40% teaching and 60% labs.
Course Benefits
This course helps attendees to develop an understanding of multi-tasking programming patterns and strategies for inter-process communication both in general terms and also specifically using the uCOSII API. In addition attendees will also master the techniques for implementing device drivers and integrating them into the uCOSII framework will also be covered.
Course Contents
Overview of approaches to multi-tasking in embedded systems
- Principles underlying per-emptive multi-tasking operating systems
- The role of device drivers and interrupt handling in pre-emptive multitasking operating systems
- Layered handling of interrupts
- Soft vs. hard real-time
- Overview of schedulers and scheduling strategies
The structure and design of the uCOSII operating system
- task management and the task state-machine
- resource management and control
- overview of the uCOSII Kernel structure
- kernel services and task scheduling
- understanding the uCOSII initialisation process
- timers and timer interrupts
The structure and design of the uCOSII operating system
- task management and the task state-machine
- resource management and control
- overview of the uCOSII Kernel structure
- kernel services and task scheduling
- understanding the uCOSII initialisation process
- timers and timer interrupts
Basic Principles of Implementing Multi-tasking Applications
- Context switching and its implications
- Designing and implementing simple multi-tasking applications
- Semaphores and their uses
Patterns for controlling access to shared resources
- implementing the simple producer - consumer pattern
- the concept of a critical section
- pipes as an inter-process communication mechanism and inter-process signaling using event flags
- readers and writers patterns
messaging and message based application patterns
- task communication via messages and message queues
- combining message queues with State Machines - "Active Objects"
interrupt handling
- hardware specific interrupt handling issues
- layered interrupt handling - patterns and strategies
time and time handling
- uses of delaying tasks by having them sleep for a specified amounts of time
- monitoring task performance and profiling
- real time clocks and time stamps
- watchdog timers
prioritisation
- basic concepts and strategies
- nested interrupts
- interrupt masking
embedded systems anti-patterns - how to detect them and how to manage them
- deadlock
- livelock
- priority inversion
power conservation
- importance
- general principles and strategies
- hardware specific issues ( tailored to particular micro-controllers )
performance and resource usage analysis and profiling
- collecting and monitoring kernel statistics
- estimating and calculating memory requirements
- memory management schemes
- estimating, measuring and documenting interrupt latency times, response times and recovery times
simple error detection and error handling schemes
safety critical aspects of working with uCOSII
- implementing the simple producer - consumer pattern
- the concept of a critical section
- pipes as an inter-process communication mechanism and inter-process signaling using event flags
- readers and writers patterns
messaging and message based application patterns
- task communication via messages and message queues
- combining message queues with State Machines - "Active Objects"
interrupt handling
- hardware specific interrupt handling issues
- layered interrupt handling - patterns and strategies
time and time handling
- uses of delaying tasks by having them sleep for a specified amounts of time
- monitoring task performance and profiling
- real time clocks and time stamps
- watchdog timers
prioritisation
- basic concepts and strategies
- nested interrupts
- interrupt masking
embedded systems anti-patterns - how to detect them and how to manage them
- deadlock
- livelock
- priority inversion
power conservation
- importance
- general principles and strategies
- hardware specific issues ( tailored to particular micro-controllers )
performance and resource usage analysis and profiling
- collecting and monitoring kernel statistics
- estimating and calculating memory requirements
- memory management schemes
- estimating, measuring and documenting interrupt latency times, response times and recovery times
simple error detection and error handling schemes
safety critical aspects of working with uCOSII
- task communication via messages and message queues
- combining message queues with State Machines - "Active Objects"
interrupt handling
- hardware specific interrupt handling issues
- layered interrupt handling - patterns and strategies
time and time handling
- uses of delaying tasks by having them sleep for a specified amounts of time
- monitoring task performance and profiling
- real time clocks and time stamps
- watchdog timers
prioritisation
- basic concepts and strategies
- nested interrupts
- interrupt masking
embedded systems anti-patterns - how to detect them and how to manage them
- deadlock
- livelock
- priority inversion
power conservation
- importance
- general principles and strategies
- hardware specific issues ( tailored to particular micro-controllers )
performance and resource usage analysis and profiling
- collecting and monitoring kernel statistics
- estimating and calculating memory requirements
- memory management schemes
- estimating, measuring and documenting interrupt latency times, response times and recovery times
simple error detection and error handling schemes
safety critical aspects of working with uCOSII
- hardware specific interrupt handling issues
- layered interrupt handling - patterns and strategies
time and time handling
- uses of delaying tasks by having them sleep for a specified amounts of time
- monitoring task performance and profiling
- real time clocks and time stamps
- watchdog timers
prioritisation
- basic concepts and strategies
- nested interrupts
- interrupt masking
embedded systems anti-patterns - how to detect them and how to manage them
- deadlock
- livelock
- priority inversion
power conservation
- importance
- general principles and strategies
- hardware specific issues ( tailored to particular micro-controllers )
performance and resource usage analysis and profiling
- collecting and monitoring kernel statistics
- estimating and calculating memory requirements
- memory management schemes
- estimating, measuring and documenting interrupt latency times, response times and recovery times
simple error detection and error handling schemes
safety critical aspects of working with uCOSII
- uses of delaying tasks by having them sleep for a specified amounts of time
- monitoring task performance and profiling
- real time clocks and time stamps
- watchdog timers
prioritisation
- basic concepts and strategies
- nested interrupts
- interrupt masking
embedded systems anti-patterns - how to detect them and how to manage them
- deadlock
- livelock
- priority inversion
power conservation
- importance
- general principles and strategies
- hardware specific issues ( tailored to particular micro-controllers )
performance and resource usage analysis and profiling
- collecting and monitoring kernel statistics
- estimating and calculating memory requirements
- memory management schemes
- estimating, measuring and documenting interrupt latency times, response times and recovery times
simple error detection and error handling schemes
safety critical aspects of working with uCOSII
- basic concepts and strategies
- nested interrupts
- interrupt masking
embedded systems anti-patterns - how to detect them and how to manage them
- deadlock
- livelock
- priority inversion
power conservation
- importance
- general principles and strategies
- hardware specific issues ( tailored to particular micro-controllers )
performance and resource usage analysis and profiling
- collecting and monitoring kernel statistics
- estimating and calculating memory requirements
- memory management schemes
- estimating, measuring and documenting interrupt latency times, response times and recovery times
simple error detection and error handling schemes
safety critical aspects of working with uCOSII
- deadlock
- livelock
- priority inversion
power conservation
- importance
- general principles and strategies
- hardware specific issues ( tailored to particular micro-controllers )
performance and resource usage analysis and profiling
- collecting and monitoring kernel statistics
- estimating and calculating memory requirements
- memory management schemes
- estimating, measuring and documenting interrupt latency times, response times and recovery times
simple error detection and error handling schemes
safety critical aspects of working with uCOSII
- importance
- general principles and strategies
- hardware specific issues ( tailored to particular micro-controllers )
performance and resource usage analysis and profiling
- collecting and monitoring kernel statistics
- estimating and calculating memory requirements
- memory management schemes
- estimating, measuring and documenting interrupt latency times, response times and recovery times
simple error detection and error handling schemes
safety critical aspects of working with uCOSII
- collecting and monitoring kernel statistics
- estimating and calculating memory requirements
- memory management schemes
- estimating, measuring and documenting interrupt latency times, response times and recovery times