Help needed to program serial port of AT89C51Ac3 controller

Started by reena chauhan November 19, 2009
hi ..
I m using AT89C51Ac3 microcontroller using AVR workbench..I have to interface this controller to send sms to another Pc through serial port using keypad. For 9 bytes of data code is woring properly but when i send 10th byte code got hanged?
Can anybopdy tell me why this is happening ? Is there any limitation to send no of bytes data at a time throgh seial port? or any memory limitation is there? I have given 56h to 76H Ram memory location tomessage buffer ..Is there any limatation of ram?
please help me to sort outt this problem...
Reena Chauhan

Scientist 'C'

Airborne Radio

DEAL,Raipur Road

Dehradun-248001

--- On Wed, 18/11/09, Swapnil Tapadia wrote:

From: Swapnil Tapadia
Subject: Re: [AVR club] Re: help needed on avr serial programmer
To: a...
Date: Wednesday, 18 November, 2009, 9:55 PM

 







Hello.

Thank you very much for your help..

My serial programmer worked at last..

____________ _________ _________ __

From: granz_consult

To: avrclub@yahoogroups .com

Sent: Wed, 18 November, 2009 9:21:38 PM

Subject: [AVR club] Re: help needed on avr serial programmer

Hello,

Are you tied to a serial version? This looks like a pretty simple programmer, but if you have a spare parallel port, you can get an even lower parts count; like "no" parts (the resistors are optional). Eddy Wright at Wright Hobbies uses a version of the Sample Electronics Cable for his robots (check out the cable itself at: http://www.wrightho bbies.net/ bots/ttbot/ sample_electroni cs_programmer. pdf, and http://www.wrightho bbies.net/ guides/bascomsam ple.htm will show you how to set up BasCOM AVR for that cable.) Do a search for the Sample Electronics Parallel Programmer for more information about this. I have successfully used this programmer on Tiny13s, Tiny2313s, 90S2313s, Mega48s, Mega8s, Mega88s and Mega16s. It works great and is about the simplest programmer for any controller that I have ever used.

Good Luck,

Art

--- In avrclub@yahoogroups .com, "swapnil_tapadia" wrote:

>

> hi. i am working on serial programmer for avr. i got circuit diagramme from internet. i have built the circuit. i am using ponyprog2000. but when i do probe test , test fails. i can not find what is the problem. can any one please help me?

> here is the link for programmer ckt diagramme i hav used:

> http://diy4fun. blogspot. com/2009/ 01/simple- serial-programme r-for-avr. html

>

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Go to here:
http://sajiduc.blogspot.com/2008/04/beginners-microcontroller-programming.html

Aurangozeb

EEE,BUET

________________________________
From: reena chauhan
To: a...
Sent: Thu, November 19, 2009 11:22:03 AM
Subject: [AVR club] Help needed to program serial port of AT89C51Ac3 controller

hi ..
I m using AT89C51Ac3 microcontroller using AVR workbench..I have to interface this controller to send sms to another Pc through serial port using keypad. For 9 bytes of data code is woring properly but when i send 10th byte code got hanged?
Can anybopdy tell me why this is happening ? Is there any limitation to send no of bytes data at a time throgh seial port? or any memory limitation is there? I have given 56h to 76H Ram memory location tomessage buffer ..Is there any limatation of ram?
please help me to sort outt this problem...

Reena Chauhan

Scientist 'C'

Airborne Radio

DEAL,Raipur Road

Dehradun-248001

--- On Wed, 18/11/09, Swapnil Tapadia wrote:

From: Swapnil Tapadia
Subject: Re: [AVR club] Re: help needed on avr serial programmer
To: avrclub@yahoogroups .com
Date: Wednesday, 18 November, 2009, 9:55 PM

Hello.

Thank you very much for your help..

My serial programmer worked at last..

____________ _________ _________ __

From: granz_consult

To: avrclub@yahoogroups .com

Sent: Wed, 18 November, 2009 9:21:38 PM

Subject: [AVR club] Re: help needed on avr serial programmer

Hello,

Are you tied to a serial version? This looks like a pretty simple programmer, but if you have a spare parallel port, you can get an even lower parts count; like "no" parts (the resistors are optional). Eddy Wright at Wright Hobbies uses a version of the Sample Electronics Cable for his robots (check out the cable itself at: http://www.wrightho bbies.net/ bots/ttbot/ sample_electroni cs_programmer. pdf, and http://www.wrightho bbies.net/ guides/bascomsam ple.htm will show you how to set up BasCOM AVR for that cable.) Do a search for the Sample Electronics Parallel Programmer for more information about this. I have successfully used this programmer on Tiny13s, Tiny2313s, 90S2313s, Mega48s, Mega8s, Mega88s and Mega16s. It works great and is about the simplest programmer for any controller that I have ever used.

Good Luck,

Art

--- In avrclub@yahoogroups .com, "swapnil_tapadia" wrote:

>

> hi. i am working on serial programmer for avr. i got circuit diagramme from internet. i have built the circuit. i am using ponyprog2000. but when i do probe test , test fails. i can not find what is the problem. can any one please help me?

> here is the link for programmer ckt diagramme i hav used:

> http://diy4fun. blogspot. com/2009/ 01/simple- serial-programme r-for-avr. html

>

Keep up with people you care about with Yahoo! India Mail. Learn how. http://in.overview. mail.yahoo. com/connectmore



>From cricket scores to your friends. Try the Yahoo! India Homepage! http://in.yahoo. com/trynew