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

Sun Oct 13 2019, 07:32 AM
Aline Hutchinson
Hey there,
ExperimenterUK
Sun Oct 13 2019, 03:53 AM
Log in.. then post your code in the 8051 forum
Sat Oct 12 2019, 03:48 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, 01:07 PM
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.
Thu Sep 19 2019, 02:18 AM
Caryn Kover
Thank you for your time,
ExperimenterUK
Tue Aug 06 2019, 12:39 AM
@Ismail ..post in forum, give details
Mon Aug 05 2019, 10:03 PM
Ismail balghmi
Hello. Please I won't download
ExperimenterUK
Wed Jul 24 2019, 06:17 AM
@BUSTER123 Please post in the forum
Tue Jul 23 2019, 11:43 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
Fri Jul 12 2019, 01:25 AM
@ramos https://www.theengineeringprojects.com/2017/09/l298-motor-driver-library-proteus.html

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Posted By [email protected]
Thu Oct 17 2019, 09:30 AM
i want to scroll message more than 2 dot matrix di...
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Posted By ExperimenterUK
Wed Oct 16 2019, 09:58 PM
What do you mean by "message scroll vertically" ?...
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Wed Oct 16 2019, 07:38 AM
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Posted By [email protected]
Wed Oct 16 2019, 07:13 AM
message scroll vertically, please share code.
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Posted By ExperimenterUK
Wed Oct 16 2019, 01:10 AM
Which camera ?What do you want the micro to do ?
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Posted By ilylily07
Tue Oct 15 2019, 04:43 PM
i need help.i don't know how to do it.is it possib...
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Posted By ExperimenterUK
Sun Oct 13 2019, 06:10 PM
This code does some scrolling.You will need to fin...
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Posted By ExperimenterUK
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This code does not scroll, that will be complicate...
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Posted By [email protected]
Sat Oct 12 2019, 06:44 AM
Sir, Please share code, i m unable to scroll messa...
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Posted By ExperimenterUK
Sat Oct 12 2019, 02:45 AM
Okay I got it !Data is not automatically passed on...