Embedded System Desgin

C Programming Tutorials

The C Programming Language is an excellent choice for beginning programmers as well as for people who do not intend to become a programmer but just want the experience of creating a program.
Three things are necessary for creating C programs: a text editor, a compiler and a C standard library. A text editor is all that is needed to create the Source Code for a program in C or in any other language.

A compiler is a specialized program that converts source code into machine language (also called object code or machine code) so that it can be understood directly by a CPU (central processing unit). An excellent C compiler is included in the GNU Compiler Collection (GCC).

An integrated development environment (IDE) or interactive development environment is a software application that provides all things (ie,a text editor, a compiler and a C standard library etc). There are a lot of IDE available with diffrent OS look here.

Available C compilers with Diffrent OS And IDE

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Compiler	Author	Windows	Unix-like	Other OSs	License type	IDE
AMPC	Axiomatic Solutions Sdn Bhd	Yes	Yes	Yes	Proprietary	Yes
Aztec C	Manx Software Systems	No	No	Yes CP/M, CP/M-86, MS-DOS	Proprietary	No
Amsterdam Compiler Kit	Andrew Tanenbaum and Ceriel Jacobs	No	Yes	Yes	BSD	No
CCS C Compiler	CCS, Inc.	Yes	Yes	Yes	Proprietary	Yes
Ch	SoftIntegration, Inc	Yes	Mac OS X, FreeBSD, Linux, Solaris, HP-UX, AIX, Qnx	Yes	Freeware	Yes — Professional and Student versions only
Clang	LLVM Project	Yes	Yes	Yes	BSD	No
CParser/libFirm	Matthias Braun, Christoph Mallon and Michael Beck	Yes	Yes	Yes	GPL	No
Digital Mars	Digital Mars	Yes	No	No	?	No
Dignus Systems/C	Dignus, L.L.C	Yes (host)	Yes (host)	Yes Z/Architecture	Proprietary	No
GCC C	GNU Project	Mingw, Cygwin	Yes	Yes IBM mainframe, AmigaOS, VAX/VMS, RTEMS	GPL	NetBeans
IAR C/C++ Compilers	IAR Systems	Yes	No	No	Proprietary	Yes
Interactive C	KISS Institute for Practical Robotics	Yes	Unix, Mac, Linux, IRIX, Solaris, SunOS	No	Freeware	No
LabWindows/CVI	National Instruments	Yes	Yes	Yes	Proprietary	Yes
lcc	Chris Fraser and David Hanson	Yes	Yes	Yes	Freeware (source code available for non-commercial use)	Windows only
Mark Williams C	Mark Williams Company	Yes	Coherent	Yes	Proprietary	Yes
Micro C Compiler (mcc)	Roshan Snigh	Yes	Yes	Yes	Freeware (source code available for non-commercial use)	No
MikroC Compiler	Mikroelektronika	Yes	Yes	Yes	Proprietary	Yes
Nwcc	Nils Weller	No	Yes	No	BSD	No
Open64	AMD SGI Google HP Intel Nvidia PathScale Tsinghua University and others	No	Yes	Yes	GPL	No
Open Watcom	Sybase and SciTech Software	Yes	Yes Linux	Yes OS/2, MS-DOS	Sybase Open Watcom Public License	Yes Windows only?
Pelles C	Pelle Orinius	Yes	No	No	Freeware	Yes
PGCC	The Portland Group	Yes	Yes	?	Proprietary	Yes — Visual Studio on Windows
Portable C Compiler	Stephen C. Johnson, Anders Magnusson and others	Yes	Yes	Yes	BSD	No
Power C	Mix Software	No	No	Yes	Proprietary	No
QuickC	Microsoft	Yes	No	No	Proprietary	Yes
RCC (RCOR C Compiler)	Rodrigo Caetano (rcor)	Yes	Yes	No	GPL	No
Ritchie C Compiler (PDP-11)	Dennis Ritchie and John Reiser; converted to cross-compiler by Doug Gwyn	Yes	Yes	Yes	Freeware	No
SAS/C	SAS Institute	Yes	Yes	Yes IBM mainframe, AmigaOS, 68K, 88K	Proprietary	Yes
Small-C	Ron Caine, James E. Hendrix, Byte magazine	Yes	Yes	Yes CP/M MS-DOS	Public Domain	Yes
Small Device C Compiler	Sandeep Dutta and others	Yes	Yes	?	GPL	No
SubC	Nils M Holm	MinGW	FreeBSD, NetBSD, Linux	No	Public Domain	No
Tiny C Compiler	Fabrice Bellard	Yes	Yes	No	LGPL	No
(Borland) Turbo C	Embarcadero	Yes	No	Yes	Proprietary - V 2.01 freely available	Yes
ups debugger (includes C interpreter)	Tom Hughes, Ian Edwards, and others	No	Yes	Yes Solaris, SunOS	GPL	Yes
VBCC	Dr. Volker Barthelmann	Yes	Yes	Yes	Freeware (source code available, modification not allowed)	No
Visual C++ Express	Microsoft	Yes	No	No	Freeware	Yes
XL C	IBM	No	AIX, Linux	No	Proprietary	Eclipse

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I am using ubuntu (Linux os) here is the compailer is GNU GCC

Because linux is an open Source and can be rewrite ,edit etc ...

................................................................

1.) Install GCC Compiler on you ubuntu (Tutorial)

2.) Write First Program (that is called source code) as follows.(C programming with Ubuntu tutorials)

(first Program)

#include<stdio.h>

int main()
{
    printf(“Hello World);
    return 0;
}

.....................................................

3.) Compiling the above program .

.................

Find the result Do these 2 or more times to understand and by heart

Next Tutorials

.........

LCD interfacing with AVR .Atmeg8

AVR- LCD Interfacing Tutorials

A variety of AVR micro-controller are available from Atmel having family of 8-bit,16 bit,32-bit etc along with different features. We are taking Atmega8 to interface 16X2 LCD .

Atmega8 is 8 bit (see data sheet here) controller.

LCD interfacing with AVR .Atmeg8

AVR- LCD Interfacing Tutorials

A variety of AVR micro-controller are available from Atmel having family of 8-bit,16 bit,32-bit etc along with different features. We are taking Atmega8 to interface 16X2 LCD .

Atmega8 is 8 bit (see data sheet here) controller.

ADC Interfacing 0804 (with 8051)

ADC Interfacing 0804 (with 8051)
Download here the datasheet download

The easiest way to do analog to digital conversion is to use an IC such as the ADC0804 that does the work for you. The analog voltage is applied to pin 6 and the result is available at pins 11 through 18. We will connect pin 1 and 2 (Chip Select and Read) to ground so that the chip is always enabled. (If you wanted to use more than one ADC you could use this pin to control which chip is currently enabled).
Connect pin 7 (Vin - ) to ground. The ADC0804 includes an internal oscillator which requires an external capacitor and resistor to operate. Connect the 150 pF capacitor from pin 4 (CLOCK IN) to ground and the 10k ohm resistor from pin 4 to pin 19 (CLOCK R).

ADC0804 is a very commonly used 8-bit analog to digital convertor. It is a single channel IC, i.e., it can take only one analog signal as input. The digital outputs vary from 0 to a maximum of 255. The step size can be adjusted by setting the reference voltage at pin9. When this pin is not connected, the default reference voltage is the operating voltage, i.e., Vcc. The step size at 5V is 19.53mV (5V/255), i.e., for every 19.53mV rise in the analog input, the output varies by 1 unit. To set a particular voltage level as the reference value, this pin is connected to half the voltage. For example, to set a reference of 4V (Vref), pin9 is connected to 2V (Vref/2), thereby reducing the step size to 15.62mV (4V/255).

For getting More information Look Here

Interfacing adc

Circuits

Code

#include <REGX51.H>
#define output P2
sbit wr = P1 ^ 1;
sbit rd = P1 ^ 0;
sbit intr = P1 ^ 2;
void delay(unsigned int msec)
{
int i, j;
for (i = 0; i < msec; i++)
for (j = 0; j < 1275; j++);
}

void adc()
{
rd = 1;
wr = 0;
delay(1);
wr = 1;
while (intr == 1);
rd = 0;
delay(1);
intr = 1;
}

void main()
{
while (1) {

adc();
{
delay(100);
}
}
}

ADC Interfacing 0804 (with 8051)

For getting More information Look Here

Interfacing adc

Circuits

Code

8-Bit Mode LCD interfacing with 8051

8-Bit Mode LCD interfacing with 8051

As discussed in the previous section [ look here ] ,here providing the circuits diagram and the code including Proteus simulation file .
Controller - Atmel 89s52
Copmiler - Keil U-Version4
Simulator - Proteus 7.6

Author - Gireesh Kumar K.S

Email - thannara123@gamil,com

Mob - 9447825107

C- Code for 89S52

#include <REGX51.H>
sfr lcd_dat = 0xA0;
sbit rs = P3 ^ 0; //register select pin
sbit en = P3 ^ 1; //enable pin

void delay(unsigned int msec)
{
int i, j;
for (i = 0; i < msec; i++)
for (j = 0; j < 1275; j++);
}

void lcd_strobe()
{
en = 1;
delay(1);
en = 0;
}

void lcdcmd(unsigned char gk)
{
lcd_dat = gk;
rs = 0;
lcd_strobe();
}

void lcd_Ini()
{
lcdcmd(0x38);
delay(30);
lcdcmd(0x0c);
delay(10);
lcdcmd(0x06);
delay(10);
lcdcmd(0x01);
delay(10);

}

void lcd_data(unsigned char gk)
{
lcd_dat = gk;
rs = 1;
lcd_strobe();
}

void string(const char *q)
{
while (*q) {
lcd_data(*q++);
}
}

void main()
{
P2 = 0x00;
P3 = 0x00;

lcd_ini();
string("Hello world ");
lcdcmd(0xc0);
string("Testing "); // test display
lcdcmd(0xc9);

lcd_data(58); // direct entry display

while (1) {
} // for endeless

}

Download here the full project including Proteus file
Download