Introduction-to-Keil.ppt

Keil C : A Cross Compiler

1. INTRODUCTION TO
KeilSOFTWARE
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2. Keil: A Cross Compiler
The Keil 8051 Development Tools are
designed to solve the complex problems
facing embedded software developers.
Keil offers an evaluation package that will
allow the assembly and debugging of files 2K
or less.
This package is freely available at their web
site. Keil’s website address is www.keil.com.
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3. Concept of compiler
Compilers are programs used to convert a High
Level Language to object code.
So if one wants to define a compiler then
compiler is a program that translates source
code into object code.
A cross compiler is similar to the compilers but
we write a program for the target processor (like
8051 and its derivatives) on the host processors
(like computer of x86)
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4. It means being in one environment you are
writing a code for another environment is
called cross development. And the compiler
used for cross development is called cross
compiler.
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5. Why do we need cross compiler?
Development of complex embedded systems completed
in a fraction of the time
Reliability is improved
Maintenance is easy
Knowledge of the processor instruction set and memory
architecture is not required
Improved program readability
Keywords and operational functions that more nearly
resemble the human thought process can be used.
Program development and debugging times are
dramatically reduced
Existing routine can be reused in new programs by
utilizing the modular programming techniques available
with C.
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6. Development tools provided by
Keil
IDE (Integrated Development environment)
Project Manager
Simulator
Debugger
C Cross Compiler , Cross Assembler,
Locator/Linker
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7. An assembleris used to assemble your 8051
assembly program
A compileris used to compile your C source
code into an object file
A linkeris used to create an absolute object
module suitable for your in-circuit emulator.
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8. 8051 project development cycle
These are the steps to develop 8051 project
using keil
Create source files in C or assembly.
Compile or assemble source files.
Correct errors in source files.
Link object files from compiler and assembler.
Test linked application
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9. Basic Keil Tutorial
Open Keil from the Start menu
The Figure below shows the basic names of the
windows referred.
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10. You can see three different windows in this
screen. 1) project work space window 2)
editing window 3) output window.
Project workspace window is for showing all
the related files connected with your project.
Editing window is the place where you will edit
the code
Output window will show the output when you
compile or build or run your project.
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11. To start with a new project
Select New Project from the Project Menu.
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12. Name the project.
Click on the Save Button.
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13. The device window
will be displayed.
Select the part you
will be using to test
with. For now we will
use the Atmel micro
controller AT89C51.
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14. Select this device
from given options.
Click OK
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15. Compiler will ask for copying standard 8051 startup code
to project folder.
Click NO
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16. Creating Source File
Click File Menu and
select New.
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17. A new window will open up in the Keil IDE
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18. Copy the Program source code
to the Right into the new
window.
This file will toggle Port 1 with
a delay.
#include<reg51.h>
void delay( )
{
int i;
for(i=0;i<18000;i++);
}
void main( )
{
bit mybit;
mybit=1;
while(1)
{
P1=mybit;
mybit=~mybit;
delay();
}
}
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19. Click on File menu
and select Save As…
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20. Name the file
Click the Save Button
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21. Adding File to the Project
Expand Target 1 in the Tree Menu and add file to
source group.
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22. Change file extension to .c
Click Add button
Click Close Button
Click OK button when you return to
Target, Groups, Files…dialog box
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23. Expand the Source
Group 1 in the Tree
menu to ensure that
the file was added to
the project
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24. Creating HEX for the Part
Click on Target 1 in
Tree menu
Click on Project Menu
and select Options for
Target 1
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25. Select Target Tab
Change Xtal (Mhz)
into 11.0592
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26. Select Output Tab
Click on Create Hex
File check box
Click OK Button
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27. Click on Project Menu
and select
Rebuild all Target
Files
In the Build Window it
should report ‘0 Errors
(s), 0 Warnings’
You are now ready to
Program your Part
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28. Click on Debug Menu and Select Start/Stop
Debug Session
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29. Running the Keil Debugger
The Keil Debugger
should be now be
Running.
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30. To check output..
Click on Peripherals.
Select I/O Ports,
Select Port 1
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31. A new window should
port will pop up. This
represent the Port
and Pins
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32. Step through the code by
pressing F11 (step by
step debugging) on the
Keyboard. The Parallel
Port 1 Box should change
as you completely step
through the code.
To exit out, Click on
Debug Menu and Select
Start/Stop Debug Session
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33. VISIT www.8051.infor more…….
THANKS
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