Author Topic: Problem with P89V51RD2FA  (Read 7355 times)

harnamt

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Problem with P89V51RD2FA
« on: June 06, 2006, 04:08:43 am »
Hello  there !

When I was using this uC
P89V51RD2FA,
CN6014.00
KzNO435 AC
Everything was cool, I could Communicate with hyper terminal and test my programs.



The next assignment I bought from the dealer is with the following
description and now  I can not establish the communication with the
hyper terminal
P89V51RD2FA
CP2821.00
K1G0505AC


What could be the reason ?

Regards

HS THAKUR



Post Edited (06-06-06 04:27)

Jan Waclawek

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Re: Problem with P89V51RD2FA
« Reply #1 on: June 06, 2006, 04:32:07 am »

harnamt

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Re: Problem with P89V51RD2FA
« Reply #2 on: June 06, 2006, 06:01:41 am »
I have tried more than 20 pieces, same problem.
In ISP mode it's Ok, I can download the hex files without any problem.
LCD programs etc are working O.K.

This problem is coming in the the terminal program only. When I insert
the first chip, it.s working

No communication is taking place, the chip does not responds.

Regards



HS THAKUR


Jan Waclawek

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Re: Problem with P89V51RD2FA
« Reply #3 on: June 06, 2006, 06:53:53 am »
> This problem is coming in the the terminal program only. When I insert
> the first chip, it.s working
>
> No communication is taking place, the chip does not responds.

I don't understand. Are you trying to get into the bootloader mode using a terminal emulator?

Please elaborate.

Jan Waclawek

harnamt

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Re: Problem with P89V51RD2FA
« Reply #4 on: June 06, 2006, 09:24:42 am »
NO, SIR,


I just simply downloaded the hex file for key pad program.
Opened windows hyper terminal and
selected Port,baud rate 9600,data bit 8, Parity None,Stop bit 1,
Hardware None


I am trying to test the matrix key pad program
When any key between S1 to S16 is pressed it displays the corresponding number on the hyper terminal saying

Jan Waclawek

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Re: Problem with P89V51RD2FA
« Reply #5 on: June 06, 2006, 03:09:41 pm »
Is there any indication that your "keypad" program is actually running?
E.g. some LEDs flashing etc.

Jan Waclawek

harnamt

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Re: Problem with P89V51RD2FA
« Reply #6 on: June 06, 2006, 06:33:34 pm »


The same program when I download on first chip  on the same development board it works OK.
I tried ADC program in hyper terminal where temp reading can be read.

regards

HS THAKUR

Jan Waclawek

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Re: Problem with P89V51RD2FA
« Reply #7 on: June 06, 2006, 11:50:25 pm »
Can you try to make a very simple program, such as flashing a LED, to detect if the proper file gets "burned" and is running?


Jan Waclawek

harnamt

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Re: Problem with P89V51RD2FA
« Reply #8 on: June 09, 2006, 09:04:11 pm »
Yes, I tried a simple program, blinkyi t's working OK.

The problem coming with this chip is that it does not respond in terminal
program i.e. hyper terminal


Harnam


Jan Waclawek

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Re: Problem with P89V51RD2FA
« Reply #9 on: June 10, 2006, 08:26:05 am »
Maybe the problem is in hyperterminal - isn't the HW handshake on?
Hyperterminal has a bad reputation because of the overcomplicated way how to set it up. Try perhaps an alternative terminal program, my favorites are "Tera term" and "terminal by Bray".

Jan Waclawek

erikm

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Re: Problem with P89V51RD2FA
« Reply #10 on: June 12, 2006, 06:29:09 am »
here is the real question:

do you believe in the urban legend "you do not need a MAX232(equivalent)?"

Erik

erik