26-11-2012, 12:05 PM
EVALUATION OF EMBEDDED SYSTEM
1EVALUATION OF EMBEDDED.pdf (Size: 66.36 KB / Downloads: 24)
Abstract
If the accuracy of the work done by any gadget is
precision, then the cost of manufacturing the gadget
becomes directly proportional to it. This in turn decreases the
end users affordability or adoptability to it.
In the coming decades, the quality of work will play the
role in all the fields. Too considering the Medical field, the
accuracy, time, precision, adoptability, user-friendly are all
to be considered.
This parameters plays the most important to develop a
gadget in Medical field. So these parameters measure the
cost of the gadget developed. This directly increases the
cost of usage to the end user.
As far as the embedded is in action, all the above
noted parameters are brought into a single chip, too a tiny
gadget which reduces the cost of manufacture, user
friendly, adoptability, precision etc.
As the gadget is reduced in its size but maintaining the
end result with most advantages then a machine, it makes
the end users to use them at cheaper costs.
Embedded System - Intro
The name gives the meaning -> Togetherness. This
embedded system consists of two parts namely Hardware +
Software. The hardware is the microprocessor and the
memory is the sof tware part.
Where ever a system consist these both, then it
becomes embedded system.
This is also known as “Inbuilt Intelligence”
The memory part of the embedded system holds the
operations / procedures that are to be executed. All these
instructions can be altered any time using appropriate
sof tware and can be written the system and perform the
process.
As the memory in integrated with the processor, the
space becomes more compact, high speed, realiblty,
flexibility etc.
The most peculiar note is, the failure percentage in
embedded system is 1%.
Trends
A plethora of processors are available to cater to
different applications. 8 – bit, 16 – bit and 32 – bit processors
are available with different processing powers and memory
addressing capabilities. Advanced digital signal processors (
DSPs) cater to AV coding and image processing. Embedded
systems are built around processor boards.
DSPs are specially designed to handle audio and video
signals. In audio and video processing unwanted frequencies
are removed by filtering. The signals are converted into
frequency domain using Fourier transforms. The spectrum of
the signal is analysed in the frequency domain. This process
requires intensive mathematical computation. The DSP
carries out mathematical computation quickly using a
“multiplier and accumulator” module.
Embedded Security.
Network-enabled systems are prone to cyber attacks.
IBM addresses the security issue by equipping select
ThinkPad and NetVista computers (Known as IBM clients)
with built-in cryptographic technologies in both hardware
and sof tware of the systems. IBM’s integrated security chip is
a cryptographic microprocessor that is embedded in system
board. This chip facilitates encryption for protection from
privacy intrusion and digital signatures for authentication. I ts
EEPROM stores the access key pair.
The chip communicates with the main processor of the
client through a 5MB system management bus.
Cryptographic functions are implemented in the chip
through the IBM chip library. Security features include 1024-
bit and 512-bit digital signature, 1024-bit and 512-bit key
decryption, and up to 256-bit key decryption of information
encrypted using 1024-bit and 512-bit keys.
Medical
As far as the medical field is considered, all the
equipments are costly as they are highly precision and
accurate. This is b’cos of the complicated structure of the
testing equipments. Since a PC is not required, for an
equipment and due to the calibration, sensing, recording
the patients records, they are being forced to fit in the
equipments.
This can be eliminated by using the embedded system.
The equipment is going to be used only for the specif ied
actions and not for any other extra purposes. If this is going
to be the condition, the things can be made to work
repeated by feeding the data’s and program in the chip
and connect the Input & Output devices to the chip and
note the required output.