Embedded Software
- 1. EMBEDDED SOFTWARE OBJECTIVES: WHAT IS EMBEDDED SOFTWARE DIFFERENCE BETWEEN EMBEDDED AND OTHER SOFTWARE'S TYPES OF EMBEDDED SOFTWARE'S AND EMBEDDED SYSTEMS CHARACTERISTICS OF EMBEDDED SOFTWARE EMBEDDED SYSTEM DESIGN
- 2. WHAT IS EMBEDDED SOFTWARE EMBEDDED SOFTWARE IS WHAT , WHICH IS INSTALLED ON AN EMBEDDED SYSTEM A SPECIAL-PURPOSE COMPUTER SYSTEM, PART OF A LARGER SYSTEM WHICH IT CONTROLS. FIRMWARE IS ALSO A KIND OF EMBEDDED SOFTWARE.
- 3. DIFFERENCES CONTINUOUS: EMBEDDED SYSTEMS GENERALLY RUN CONTINUOUSLY AND DO NOT TERMINATE. INTERACTIONS: INTERACTIONS WITH SYSTEM ENVIRONMENT IS GENERALLY LESS CONTROLLABLE AND UN-PREDICTABLE HOWEVER POSSIBLE IN REAL TIME EMBEDDED SOFTWARE'S. PHYSICAL LIMITATION TYPE OF HARDWARE , SIZE , NO. OF CHIPS. DIRECT ON H/W: DIRECTLY INSTALLED OF HARDWARE. DRIVERS: NO NEED FOR SEPARATE DRIVERS. RELIABILITY: RELATIVELY RELIABLE AND LONG-LASTING
- 6. WHERE IT IS BEING USED Product: Sonicare Plus toothbrush. Microprocessor: 8-bit Zilog Z8. FROM YOUR BATHROOM...
- 7. TO MARS... PRODUCT: NASA'S MARS CURIOSITY ROVER. MICROPROCESSOR: 8-BIT INTEL 80C85.
- 8. BIG...
- 9. TO SMALL...
- 10. Levelofdependency AUTOMOTIVE ELECTRONICS Embedded systems: 90% future innovations 40% price 1970 1980 1990 2000 ACC Stop&Go BFD ALC KSG 42 voltage Internet Portal GPRS, UMTS Telematics Online Services BlueTooth Car Office Local Hazard Warning Integrated Safety System Steer/Brake-By-Wire I-Drive Lane Keeping Assist. Personalization Software Update Force Feedback Pedal… Electronic Injections Check Control Speed Control Central Locking … Navigation System CD-Changer ACC Adaptive Cruise Control Airbags DSC Dynamic Stability Control Adaptive Gear Control Xenon Light BMW Assist RDS/TMC Speech Recognition Emergency Call… Electronic Gear Control Electronic Air Condition ASC Anti Slip Control ABS Telephone Seat Heating Control Autom. Mirror Dimming … source:BMW
- 11. CHARACTERISTICS OF EMBEDDED SYSTEMS SINGLE-FUNCTIONED Dedicated to perform a single function COMPLEX FUNCTIONALITY Often have to run sophisticated algorithms or multiple algorithms. Cell phone, laser printer. TIGHTLY-CONSTRAINED Low cost, low power, small, fast, etc.
- 12. REACTIVE AND REAL-TIME Continually reacts to changes in the system’s environment Must compute certain results in real-time without delay SAFETY-CRITICAL Must not endanger human life and the environment REUSABILITY Used again and again RELIABILITY Relatively Reliable
- 13. EMBEDDED SYSTEMS DESIGN FOCUS ON : COST DESIGN POWER CONSUMPTION SPECIAL PURPOSE Stimulus response model is being used for real time embedded software design. 1_Periodic stimuli 2_Aperiodic stimuli
- 14. Activities to design a real time embedded software 1_Platform Selection 2_Stimuli / response identification 3_Timing Analysis 4_Process design 5_Algorithm design 6_Process Scheduling