Embedded Technology Amit Sachdeva Singsys Pte. Ltd.
Embedded Technology
May 17, 2015
The word embed refers that we are embedded some code to work the hardware. Or we can say we are integrating the programmed modules of hardware with big systems. These hardware modules are ICS.
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Embedded TechnologyAmit SachdevaSingsys Pte. Ltd.
What is Embedded Technology ?
An embedded system is a computer system with a dedicated function within a larger mechanical or electrical system, often with real-time computing constraints.
Few examples
General Purpose:-Automobiles MP3Cell phones GPS MicrowaveNetwork routersGame consolesSpecial Purpose :-ATM machines, Medical Instruments, Aircraft,
Satellites
Schematic (a example)
CPU
Memory
Permanent Memory
Input
Sensorsto measure
physical values
Actuatorsto
controlphysicalthings
Outputdevice (screen)
bus
program
Challenges for developing a embedded system
SecurityScalabilityHigh availabilityPerformance-based interoperabilityReal-time
Components
It has hardwareIt has main application softwareIt has Real time operating system (RTOS).
Real-Time System
Hard Real Time SystemFailure to meet deadlines is fatal
Example : Flight Control System
Soft Real Time SystemLate completion of jobs is undesirable but not fatal.System performance degrades as more & more jobs
miss deadlines
Role of RTOS in Embedded systemStandalone Applications
Often no OS involvedMicro controller based Embedded Systems
Some Real Time Applications are huge & complexMultiple threadsComplicated Synchronization RequirementsFile system / Network / Windowing supportOS primitives reduce the software design time
Linux OS
Royalty free licensing.Reliable IP stack and TCP/IP applications.Open Source KernelTool chain source codes are open source.
Kernel Types
Monolithic Kernel.
Modular kernel
Examples of RTOS
ETLinuxuLinuxmuLinuxArtLinuxKUARTLinux-SrtQlinuxRTAI
Firmware programming
CEmbedded C.Assembly language.
RTOS programming
C language.System programmingLinux Internals.Kernel Programming. (High + Low level)
Embedded vs Desktop Programming
Limited ROM, RAM, stack spaceLimited powerLimited computing capabilityReal-time responses and controls critical timing (interrupt service routines, tasks, …)
ReliabilityHardware-oriented programming
Thanks you.QueriesDoubtsDiscussions
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