Difference in Embedded C an C

8/9/2019 Difference in Embedded C an C

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Presented By:Ns-Sidra Rashid


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A programming language is an artificiallanguage designed to express

computations that can be performed bya machine, particularly a computer. ...


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A programming language is used towrite computerprograms such as

Applications

Utilities

Servers

Systems Programs


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A program is written as a series of humanunderstandable computer instructions

that can be read bya compilerand linker, and translatedinto machine code so that a computercan understand and run it.


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Now programms can be written indifferent languges I wil discuss two of

them,along with their pros and cons,theirfeatures.

One is C++ and other is Embedded C.


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C++ is a general purpose programminglanguage,which has the following

special features : data abstraction

object-oriented programming

generic programming


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Embedded C++ (EC++) is a dialect ofthe C programming language

for embedded systems. Why EC?

Minimize code size

Maximizing execution efficiency Simpler Compiler construction


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Embedded C++ is a proper subset of C++. The followinglanguage features have been removed:

Multiple inheritance Virtual base classes Run-time type information (typeid) New style casts

(static_cast, dynamic_cast, reinterpret_cast and const_cast)

The mutable type qualifier

Namespaces Exceptions Templates The stated reason for removing language features was

stated as "too new to be used widely


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An EC++ program can be compiled withany C++ compiler.

However a compiler specific to EC++ mayhave an easier time doing optimization.

While a C++ programme can only be runusine c compiler.


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It aims to provide portability and access tocommon performance-increasing embeddedprocessing.

The Embedded C specification for fixed-point,named address spaces,and named registers givesthe programmer direct access to features in thetarget processor.

The hardware I/O extension is a portability featureof Embedded C.

Its goal is to allow easy porting of device-drivercode between systems.


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In the C standard, a standaloneimplementation doesn't have to provide all ofthe library functions that a hosted

implementation has to provide. The C standard doesn't care about

embedded, but vendors of embedded systemsusually provide standalone implementations

with whatever amount of libraries they're willingto provide.


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#include

void wait (void) { ; }

void main (void) { unsigned int i;

unsigned char j;

while (1) { infinite loop for(j=0; j= 6; j--) { /* Blink LED 6, 5, 4, 3, 2, 1 */ outputtoled = j; /* Output to LED Port */ for(i = 0; i < 10000; i++) { /* Delay for10000 Counts */ wait (); /* call wait function */ } } } }


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// a simple programme to make the a pattern of led on with regular intervals #include

void wait (void) { /* wait function */ ; /* only to delay for LED flashes */ }

void main (void) { unsigned int i; /* Delay var */ unsigned char j; /* LED var */

while (1) { /* Loop forever */ for(j=0x02; j< 0x80; j>=1) { /* Blink LED 6, 5, 4, 3, 2, 1 */ P1 = j; /* Output to LED Port */ for(i = 0; i < 10000; i++) { /* Delay for10000 Counts */ wait (); /* call wait function */ } } } }


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I/O Hardware Addressing

Embedded C Portability

Scheme For EC: Data lines, bits, nibbles, bytes, words, binary

and HEX.

Boolean Logic as it relates to programming aswell as the hardware.

Putting It All Together - Controlling TheHardware With The Software.

Is used for signal conversions,controlling motors


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Embedded c deals with MicroControllers

IO Ports( Ram, Rom).its more efficient.

Where as C deals with only memory,operatingSystems.

C is a desktop programming language.

for embedded a piece of software codeis implemented into the hardware for itsfunctioning which should supports pre-emption, low latency etc

Difference in Embedded C an C

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