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Idea: safety critical software development

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Abstract

The-Software-Experts

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Home
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Shop[ - ]
SW-Training
- Software Design
- Safe Coding in C
- Software Inspection
- Software Testing

SW-Design
- Architecture
- Module Design

Coding in C
- Safe Coding in C

Refactoring
- Principles
- Methods

SW-Testing
- Principles
- Static Analysis
- Inspections
- Module Tests
- Functional Tests
- Integration Tests
- Test Documentation
- Links

SW-Documentation
- SGML Principles
- Printing SGML
- Links

SW-Processes
- Process Descriptions
- Process Assessments
- Self Evaluation
- Food for Thought
- Links

Safety Software
Design Training
IEC 61508 compliant
Safety Software
Design for Microcontroller
SW Document
Templates
CMMI and SPICE
compliant document
templates
SW Process
Description
CMMI Level 4 and
SPICE compliant SW
development procedure
SGML Package for
Documentation
Edit and print SGML
Documemts. Professional.
fast, easy to use.
Test Bench
for C/C++
Perl based test
environment for easy
component testing

Software Development and Testing
for Embedded Microcontroller Systems

These pages are dedicated to the development of microcontroller
software. The systems we are talking about here are sometimes called
"embedded systems" or "realtime systems". The expression "embedded
systems" is a synonym for those applications where the contained CPU is
encapsulated in an own hardware, dedicated to the application. The CPU
can be not accessed and controlled from outside and not easily supplied
with a new software. The software is "burned" into the system and
either not replacable at all or only replacable via special tools. The
expression "realtime system" stands for applications which react
immediately on external events, contrary to the more traditional
computing applications which can run batch jobs and work on data
without the requirement to react on external events and without strict
timing requirements. The interesting thing is that the expressions
"realtime system" and "embedded system" are usually used by those who
are not working with microcontrollers. I never heard one of my
microcontroller programmer colleagues using those terms to describe the
systems they work on.
Microcontroller applications can have a wide variety of size and
applications. There are very small systems using e.g. PIC
microcontrollers. This is very popular at the moment and you find a lot
of valueable literature and examples. There are a lot of hobby
applications and student projects, because the systems are cheap and
easy to use. But there is the area of the tough industrial work. These
are medium sized or large applications with 16 bit or 32 bit CPUs.
Resources are usually very limited and we are fighting against runtime,
RAM and ROM contraints. And further we are fighting very often against
quality problems originating among others in an unlucky design and
insufficient testing. I dedicated these pages to the colleagues in this
area of microcontroller development. This does not mean however, that
there is no benefit from the pages for other areas of computing.
On these pages I want to publish an outline of the knowledge and
expertise which I accumulated in almost 30 years of work with computers
and microcontroller software. This was not always an individual effort.
Most times I was working in teams, most of them really great teams. And
at this point I want to give thanks to these good colleagues and
friends. We tried to apply the shool book methods for SW processes,
design and testing. By this we came across many problems because the
microcontroller world is different than the world of the rest of the SW
community. But we always managed to find a satisfying solution to apply
them with great benefit.

Imprint

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