By Ronald K. Jurgen
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Extra info for Automotive Software: PT-127
Ht ID. 3. org Cyclic implementation Let us first look at the cyclic implementation. Restructuring software involves identifying now functions can be split up to meet the performance requirements of the system. If we assume 2 man weeks/change, this will require a total of 10 man weeks, or $20,000. Tuning the software to remove timing problems takes 4 man weeks/changes, so it will require 20 man weeks, or $40,000. Finally, an upgrade to a more powerful controller will be necessary. 5 Million. CONTACT Thierry Rolina is Business Development Manager for the Software Components product line of ETAS in North America.
Then, at some point, the technology gets acceptance and undergoes a phase of rapid growth - critical issues have been resolved, investors sponsor further development, and the technology enters the markets. After a while, the rate of growth slows down - the manufacturing processes have been perfected, and available market niches have been filled. The technology has matured. Finally, the technology stagnates and frequently disappears, being overtaken by a new, more beneficial one. Fig. 11 Power adjustment mirror The plot shows the dynamic "performance-to-cost ratio" (or "benefit-to-cost ratio") is shaped as a "lazy" S, and is commonly called the S-curve.
For lower-end applications, the basic set of attributes provides the necessary capabilities to run with full preemption, even in an 8-bit environment. Alarms are the mechanism by which OSEK scheduling handles periodic behavior. Again, looking at time is just looking at a different type of event. Sporadic behavior is handled via interrupts which could be done inside or outside the RTOS. Support of critical sections can be handled by using resources, and safe access to resources is handled via a priority ceiling protocol (best response/no deadlocks).
Automotive Software: PT-127 by Ronald K. Jurgen