Embedded Systems Software / Safety
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We can help! Our expertise brings needed skills to your project, so you can deliver on-time, on-budget, and exceed expectations.
Embedded Systems
Developing Embedded Systems software (firmware) since 1989
... designing the microcontroller-based hardware much of the time too.
Our understanding of:
• microprocessors
• peripheral interfaces
• real-time design
• interrupt/signal handlers
leads to fast, resource-efficient embedded code.
• peripheral interfaces
• real-time design
• interrupt/signal handlers
Experience with Linux and Real-Time Operating Systems such as QNX and µCOS-II, and custom cyclic and event-driven schedulers.
Languages
Software Development in:
• C / C++
• Assembly (NXP, Renesas, Microchip, others)
• Perl
• HTML / CSS / PHP
• Visual Basic for Applications
• Assembly (NXP, Renesas, Microchip, others)
• Perl
• HTML / CSS / PHP
• Visual Basic for Applications
Software Designed using:
• Unified Modeling Language (UML)
• Active State Charts
• State Transition Diagrams
• Real-Time Scheduling Algorithms
• Active State Charts
• State Transition Diagrams
• Real-Time Scheduling Algorithms
⚬ Rate Monotonic Analysis (RMA)
⚬ Major / Minor Loop Cyclic
⚬ Major / Minor Loop Cyclic
Support Services
In addition to programming, we support client Software Development in many ways, including:
• Process Development
• Code Inspection and Facilitation
• Prototype Development
• Tool Evaluation
• Code Inspection and Facilitation
• Prototype Development
• Tool Evaluation
⚬ Microprocessors
⚬ Compiler Suites
⚬ Real-time Operating Systems
⚬ In-circuit Emulators / Debuggers
⚬ Compiler Suites
⚬ Real-time Operating Systems
⚬ In-circuit Emulators / Debuggers
Critical Analyses
“Industry Standard” testing cannot find some of the most critical defects: Race conditions, Re-entrancy clashes, Deadlocks, Timing problems, Stack Overflows, etc. These can be particularly problematic in Real-time Embedded Systems, whether or not they use an RTOS.
We perform Critical Analyses on your code to uncover the defects which testing misses:
• Timing/Schedulability – will every task and interrupt always finish in time?
• Deadlock – how long could tasks block to wait for a shared resource?
• Stack Depth – can the stack overflow (or underflow) under worst-case conditions?
• Reentrancy – can a function/method be invoked safely by different priority tasks when necessary?
• Shared Resources / Race Conditions – are results affected by who calls the routine first?
• Deadlock – how long could tasks block to wait for a shared resource?
• Stack Depth – can the stack overflow (or underflow) under worst-case conditions?
• Reentrancy – can a function/method be invoked safely by different priority tasks when necessary?
• Shared Resources / Race Conditions – are results affected by who calls the routine first?