Advancing automotive application development: Page 7 of 8

February 08, 2017 //By Alexander Herz, Tasking
Advancing automotive application development
Safety-critical software functions required in a car are traditionally placed in separate, single-core Electronic Control Unit (ECU). With this practice, it’s easy to ensure that different functions with potentially different functional safety requirements and Automotive Safety Integrity Level (ASIL) are physically insulated and protected against interference from each other.

Comparing development costs and roi

In Table 1, we compare the different steps required when handling MPU traps with and without the TASKING Safety Checker. The third column shows the relative costs of each activity when performed with and without the TASKING Safety Checker.

Also, an approximation of the cost reduction of MPU related test and bug fixing costs achieved for each step by using the TASKING Safety Checker is given. We assume conservatively that 40% of overall MPU related development costs goes into test specification, 40% into test execution, 15% into code reviews and 5% into bug fixing. Furthermore, we assume that the cost ratio of fixing bugs during development, during testing, and in the field is 1:10:100 [3]:


Table 1 - Comparison of Different Steps and Costs Associated with Handling MPU traps
with and without the TASKING Safety Checker

 

Usage scenarios with the tasking safety checker

The TASKING Safety Checker can be used as a stand-alone tool which accepts any ANSI C / ISO C / C90 / C99 compliant source files, irrespective of whether the source code is compiled with or without a TASKING compiler. Also, the TASKING Safety Checker can be configured to handle many non-standard C extensions. It is easy to set up and performs a complete memory access violation analysis on the given sources using an easy-to-create, text-based access rights table as the input (see the workflow section above for an example).

Design category: 

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