Discussion in "8051 Discussion Forum" started by    omega00    Jan 14, 2011.
Fri Jan 14 2011, 10:52 PM
#1
Hi

Can some one try to explain how OCD on AT89C51RE2 works?

I dont realy understand if system debugs needs any adicional hardware when using the OCD pin?

Wht tipe of target debugs are there?
I know ISD51 from keil doesnt need adicional hardware are there any more?

BTW the main reason i want to know is to build my own dev board thats capable of in sytsten debug

Thanks in advance
Sat Jan 15 2011, 06:24 PM
#2
Well RE2 needs a special hardware AT89OCD/ATOCD51. well i think its not difficult to make this hardware yourself. but vendors always keep themselves on a safe side

Here is more information about AT89OCD/AT)CD51:
http://www.atmel.com/dyn/products/tools_card.asp?tool_id=4049

good thing about this debugger is it uses uart so i believe there is not much they have done on hardware side except those control lines.

This document will provide little more insight on this:
Attachment
Tags AT89C51RE2 OCDat89ocd-01at89ocdatocd51atmel onchip debuggerocd uart
Sun Jan 16 2011, 07:07 PM
#3
is AT89C51RE2 the best option for a learning board?
If not can u gimie some examples that are compatible with ISD51
Mon Jan 17 2011, 05:01 PM
#4
Do you have ISD51 with you? if yes then i think you can move ahead with any microcontroller available to you. Whereas if you are looking at learning prospective, then i guess you dont need a debugger. 8051 is a small controller that doesnt require a special debugger. If you really want to simulate something like uart or I/O port then you can use keil's software debugger.

For choice of 8051, i would suggest you go with any controller with ISP (in system programming) support. coz you will not be bound with any special programmer hardware. For instance Atmel's AT89C51RD2, ED2, RE2 etc
Philips P89V51RD2
Another benefit of using these ICs are they have onchip XRAM which will help you when writing bigger programs.

Do let me know what you choose

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ExperimenterUK
Sun Oct 13 2019, 12:23 AM
Log in.. then post your code in the 8051 forum
Sat Oct 12 2019, 12:18 PM
Bhadra Sajikumar
i am doing a countdown timer with 8051 for my project, unfortunately our professor had to take a leave of absence before he could teach us most of it.. can someone explain the .asm code of it for me?
Mon Sep 23 2019, 09:37 AM
Nathaniel
I am doing a project for my schools wireless security system with cameras,sensors and spot lights using 8051 micro controller, could you help me out with the design and its source code.
Wed Sep 18 2019, 10:48 PM
Caryn Kover
Thank you for your time,
ExperimenterUK
Mon Aug 05 2019, 09:09 PM
@Ismail ..post in forum, give details
Mon Aug 05 2019, 06:33 PM
Ismail balghmi
Hello. Please I won't download
ExperimenterUK
Wed Jul 24 2019, 02:47 AM
@BUSTER123 Please post in the forum
Tue Jul 23 2019, 08:13 PM
BUSTER123
hello! newbie here. i am kind of a guy who hates using ready - made existing libraries, so this helped a lot as i was trying to control and write to a character lcd display. however, i can't figure out how to set the cursor position. for example, i want to set it to the 5th column in the first row, so position 5. so according to the table, i am sending 10000101 on the 8 data lines of the lcd (register select pulled low). the cursor does not move there however. and i cant move the cursor left or right too. is it something wrong that i am doing? thank you.
ExperimenterUK
Thu Jul 11 2019, 09:55 PM
@ramos https://www.theengineeringprojects.com/2017/09/l298-motor-driver-library-proteus.html
ExperimenterUK
Thu Jul 11 2019, 09:44 PM
@praveen123. Can you give a link to the project ?

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