Software Development For Embedded Systems - Cranes Varsity

 Introduction

There is a lots of difference in embedded systems when compared it with general purpose operating systems. An embedded system is holding a microprocessor which is the heart of the entire system we can say. It will check and control the entire system functionality. The applications of the embedded systems are very huge,we can see the embedded devises in our daily routine life. We are using it in many ways starting from microwave oven to a nuclear reactor. General purpose operating system is for different kind of applications where as embedded system is dedicated to some specific task. The designing of the program in embedded system is taken care by the design engineer, it can not be modified by the end user.
The embedded system has following characteristics which can compete with the other trends.

Reliability:
We are using embedded systems mainly for critical systems, which means we need to get the functionality at the moment when it is needed ,for example: air bag system, it has to operate at the moment when it reaches it’s specific criteria otherwise there is a chances of losing the lives.
Specialized Hardware:
Embedded systems are used for performing real time functions so the hardware what we are using should be secured one. For example, to monitor and analyze the audio signals we will use signal processors.

Cost effective:
Now a days embedded systems are widely used in consumer electronics those are cost effective. The cost of this goods should below.

Robustness or with standing capability:
Even though the environment where the system will work changes, that system has to work properly. We can say that embedded system should be harsh to the environmental conditions, which means it can be
capable for with standing power fluctuations ,vibrations and some excess of heat conditions.

EMBEDDED SOFTWARE DEVELOPMENT
In general application developers, develop their applications for the computers which they are working with. This is not possible in embedded systems due to the usage of limited hardware and software. In embedded systems writing a code,compilation, assembling and linking the program is done on a general purpose computer called as a host machine, which has all required tools for develop the application. Finally the machine code is transferred to the target machine i.e. an embedded system.

The developers need to test the embedded systems by using:
1) Simulator:
It is a software tool, which will run on a host machine and simulates the behaviour of the processor of the target machine and its memory. Simulator knows the instruction set and architecture of the target processor.
2) Emulator:
It is a hardware tool, which needs to test and debug the code on the target machine. In the place of target processor, emulator is connected and it drives the signals into the circuit. All the test conditions will be given to the circuit.

CONCLUSION
The main motto of embedded system is to give a low cost system that is capable of dealing with real time scenario’s by meeting the deadlines. Recent developments in hardware -software co-design permits trade offs between hardware and software for cost effective embedded systems.

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