HOW TO SET 5 DIFFERNET ALARMS IN THE DIGITAL CLOCK PGM

Hi Rickey,

I want to add a Totalize Timer function into my RTC w/DS1307 + AT89S51.

Here some details how it will work. The totalize timer will check the condition of port 1.0 (port number for example only, other port available). When this port in low state, it will start the timer to count the time how long this port in low state. When the port in high state, time counting process is terminated and ... Read Compelte post
Other Tags: 8051 timer   DS1307 rtc   
Posted by SGH on Thu May 31 2007, 03:26 AM

Interrupt waiting Time 1s

hi joepotter
see this


general formula for timer is

(65536-xx)*machine cycle= delay u want
where xx is a 16 bit no having value of TH0 and TL0

when timer run in 16 bit mode with 11.0592 mhz max delay
that can be generated is 72 ms almost.

now let say u use 12MHz crystal then Machine cycle is calculated
as for every crystal value


(crystal value / 12)= frequency

(1 / frequency) = Machine cycle

now for 12 MHz
12... Read Compelte post

Posted by majoka on Thu Nov 25 2010, 05:33 AM

8051 Time delay/Timer routine calculator

Software Description from Kaushik, he says....:

It's been a long time I have been developing things for 8051/52 core family and got always stuck with the same old thing. The timer calculations. So I decided to write a small Calculator to do the job for me. It is very basic but hopefully solve most of day to day needs.

Please note you will require MS-Windows'98 or higher and VB runtime DLL's.

--------... Read Compelte post
Author: Kaushik | Date added: Fri Jun 01 2007, 07:41 PM

Conversation

shshistiem
Thu Sep 13 2018, 04:28 AM
hii!! some1 please let me know how i ll get rfid code to 8051 by WEIGAND mode
DrNossberg
Wed Sep 12 2018, 01:39 AM
is there anyone here?
Mon Aug 27 2018, 01:00 PM
bun
Hello everyone´╝ü
Sat Jul 21 2018, 11:51 AM
Dibakar Bhanja Chowdhury
By using a 555 timer how can I expand the range of the mobile phone jammer? Please reply me asap
Sun May 20 2018, 03:31 PM
justinb
how to write and execute a program that read the keypad button and display the number on 7 segment on intel8051 at89s52 in assembly language?
Thu May 17 2018, 12:06 PM
HAMZA TAJ
sir iwant to ask about controller of three phase supply by using back to back thyristor instead of triac....will u give me some guideline?
Sat Apr 28 2018, 06:24 PM
ashutosh jain
IR Remote Switch using TV remote (RC5 Protocol) is not working properly. opp1 & opp2 is in problem.plz help
ExperimenterUK
Sat Apr 28 2018, 01:39 AM
@kaiserslautern Post in forum
Wed Apr 25 2018, 12:39 PM
kaiserslautern
Hello everyone, using software uart is a very good idea for a second serial port. Thank you so much. I would kindly like to know how to connect this port to the PC?
ExperimenterUK
Sun Apr 22 2018, 01:20 AM
This is a community site. Feel free to help anyone needing advice

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PCBindex
Fri Sep 14 2018, 02:45 AM
sirkit
Thu Sep 13 2018, 04:46 AM
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Wed Sep 12 2018, 10:36 PM
DrNossberg
Tue Sep 11 2018, 03:25 PM
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Thu Sep 06 2018, 02:28 PM
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Fri Aug 31 2018, 08:26 AM

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Forum Activity
ExperimenterUK Avatar
Posted By ExperimenterUK
Thu Sep 13 2018, 08:39 PM
First of all, by reading your reply, I abandoned m...
DrNossberg Avatar
Posted By DrNossberg
Thu Sep 13 2018, 03:49 PM
Hi, thanks you for your reply ^^ First of all, by ...
ExperimenterUK Avatar
Posted By ExperimenterUK
Wed Sep 12 2018, 12:12 AM
HiThere are several issues here.The original 8051 ...
DrNossberg Avatar
Posted By DrNossberg
Tue Sep 11 2018, 08:08 PM
Hello everybody!First of all let me explain some s...
ExperimenterUK Avatar
Posted By ExperimenterUK
Fri Sep 07 2018, 05:08 AM
The compiler thinks the micro doesn't have enough...
Sudhansudeep Avatar
Posted By Sudhansudeep
Fri Sep 07 2018, 02:59 AM
this is the build output message
Sudhansudeep Avatar
Posted By Sudhansudeep
Fri Sep 07 2018, 01:38 AM
Change the mobile number as [number removed] in t...
ExperimenterUK Avatar
Posted By ExperimenterUK
Thu Sep 06 2018, 08:56 PM
I don't know what the problem is, I get no errors....
Sudhansudeep Avatar
Posted By Sudhansudeep
Thu Sep 06 2018, 01:12 PM
the code is Attachment ...
Sudhansudeep Avatar
Posted By Sudhansudeep
Thu Sep 06 2018, 12:48 PM
the code is same as u sent me for 16 chars