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About
the Simulator
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| EdSim51, developed by Jim Rogers,
is a simulator unlike the many industry-standard simulators
that are widely available - our simulator has the student in mind. Take
a look at the screenshot below: |
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| Screenshot of the EdSim51 Simulator
(click here
to see a full-size image) |
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- The top left box gives the user access to all the
8051's registers, data memory and code memory.
- In the centre is a textbox where the user either
loads an assembly program (from the local disk) or writes the code
directly. Shown above is a program being single-stepped (execution is
currently at location 002CH in code memory - hence that line is
highlighted).
- On the right is a list of the 32 port pins and what
each one is connected to. The current value of the port pin is
displayed here.
- The bottom panel shows all the peripherals that are
connected to the 8051.
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| We hope this simulator will help students learn to
write programs to exercise the 8051. Students can begin by ignoring the
peripherals. In this way they can first become accustomed to the many
different move, arithmetic and branch instructions that make up the
8051 instruction set. |
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| As the students gain experience and confidence they can
then write code to scan a keypad, or count the motor's revolutions, or
multiplex 7-segment displays, etc. |
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| Some of the peripherals share the same port pins. For
example, the 7-segment displays' data lines and the DAC are connected
to port 1. This means that, if the student wishes to use the display
and the DAC together, he/she must learn how to disable one to access
the other. |
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| The Lecturer's Role |
| Of course it is would be difficult to learn the 8051
just by using this simulator. This is simply another tool that the
lecturer or teacher may use to help explain and demonstrate the many
concepts of microcontrollers and embedded systems. There is also a set
of notes
provided by EdSim51 that are available to the teacher and student
alike. Please remember, while these notes are, like the simulator,
provided free of charge, they are the copyright of NyCelt LLC and must
not be reproduced without permission. |
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| See the section Notes on
the EdSim51 Simulator for more information on how to use
the
simulator. |
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| Please send us your comments
with feedback, suggestions or if you spot mistakes in either the
simulator or the notes. Thank you. |
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| A
Note from the Developer - www.jameswrogers.com |
| While lecturing in electronics at IT Sligo,
I searched the Internet for an 8051 simulator suitable for teaching but
to no avail. I therefore decided to develop my own simulator for the
basic 8051 with virtual peripherals attached to the four ports. After
about a year's working on the project, on and off, the result was the
EdSim51 simulator. I then put together a set of notes that are now the Beginner's
Guide to the 8051
on
this website. |
| I decided to offer the simulator and notes free, in the
hope
that students anywhere in the world might benefit from it. I continue
to support the simulator, adding features and fixing bugs that have
been kindly pointed out to me by the users. I hope you find both the
site and the simulator useful and I would like to hear your
experiences: Contact
Us |
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Copyright
(c) 2005-2007 NyCelt LLC
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