Discussion in "Project Help" started by    venkat    Jun 22, 2007.
Fri Jun 22 2007, 06:28 AM
#1
hai friends,
please send me the schematic and c code to inteface the 12c887 rtc with at89c51ed2 mcu, waiting in anticipation
Tags interfacing 12C887 RTCinterfacing 12C887 RTC with 8051RTC interfacing
Fri Jun 22 2007, 08:10 AM
#2
I think one thread is already open for this discussion. Please do not make duplicate posts..
and make a schematic yourself i have also given you the pin configuration, if there is any error in the schematic i will help you correcting it.
and as it is memory mapped so you can simply read and write as you write in a memory location. first you finish your schematic then i will help you.

Note: Please do not create duplicate posts. If you have already opened a discussion with similar topic, its better to continue in the same thread Try not to mess up the forum.
Thanks!
Rickey's World
Fri Jun 22 2007, 08:57 AM
#3
Do you have assembly code for that?
Fri Jun 22 2007, 02:35 PM
#4
i said.. write the code if you get error i will help you removing it why you all want ready made things
Mon Jun 25 2007, 08:25 AM
#5
sir, Thank you for your replies,
I have already tried the circuit for dispalying the time on hyperterminal. I am getting the time which is not updating, for the first time i run the project i am getting whatever the time i have set without updating. if i switch off and on the controller i get another time which is still not updating. Even after i remove the rtc (i.e., po) iam still getting the un-updated time, in this case there is no connection between the rtc registers and the microcontroller. what could be wrong?
Mon Jun 25 2007, 09:10 AM
#6
no.. it could be cause.. you did not activate the oscillator. so clock is kind of halted.
see page 11 for more information on turning the oscillator on. :-)
Sat Jul 14 2007, 09:09 AM
#7
please refer "The 8051 microcontroller and Embedded System" By Mazidi." it has a very good tutorial for interface with 12c887 RTC
i have make a project using this with asm and working fine

note: before using the RTC u must enable the internal osc by proper configuration
Sat Jul 14 2007, 09:44 AM
#8
I told him to read page 11 and after that i am sure he will get the output.. coz he already made everything just for got to enable oscillator
Tue Jul 17 2007, 10:42 AM
#9
sir, I have enabled the oscillator, and used the attached code to read the initialized data and the updated clock. I am not getting the updated time. plz help me to debug.
Tue Jul 17 2007, 12:49 PM
#10
then post your work so that we can help u to find out the problem

Get Social

Information

Powered by e107 Forum System

Conversation

ExperimenterUK
Sat Oct 12 2019, 10:23 PM
Log in.. then post your code in the 8051 forum
Sat Oct 12 2019, 10:18 AM
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, 07:37 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, 08:48 PM
Caryn Kover
Thank you for your time,
ExperimenterUK
Mon Aug 05 2019, 07:09 PM
@Ismail ..post in forum, give details
Mon Aug 05 2019, 04:33 PM
Ismail balghmi
Hello. Please I won't download
ExperimenterUK
Wed Jul 24 2019, 12:47 AM
@BUSTER123 Please post in the forum
Tue Jul 23 2019, 06:13 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, 07:55 PM
@ramos https://www.theengineeringprojects.com/2017/09/l298-motor-driver-library-proteus.html
ExperimenterUK
Thu Jul 11 2019, 07:44 PM
@praveen123. Can you give a link to the project ?

Downloads

Comments

auwal
Tue Nov 19 2019, 03:13 PM
ANKITPATEL
Mon Nov 18 2019, 11:00 AM
Casmir
Wed Nov 13 2019, 06:25 AM
DeepakBGattani
Mon Nov 11 2019, 01:31 PM
Jeanbusatta
Sun Nov 10 2019, 04:42 AM
mdayaz
Sat Nov 09 2019, 03:41 PM
baoyen123
Fri Nov 08 2019, 10:06 AM
xiwang
Fri Nov 08 2019, 07:28 AM

Online

Guests: 16, Members: 0 ...

most ever online: 182184
(Members: , Guests: 182184) on 06 Aug 2010: 05:37 AM

Members: 38105
Newest member: auwal
Forum Activity
ExperimenterUK Avatar
Posted By ExperimenterUK
Tue Nov 19 2019, 10:44 PM
The 8051 has too little memory to do anything us...
ilylily07 Avatar
Posted By ilylily07
Mon Nov 18 2019, 09:54 AM
0v7670 camera interfacing with stc 8051.using asse...
Jeanbusatta Avatar
Posted By Jeanbusatta
Sun Nov 10 2019, 04:43 AM
ty, really needed it
ExperimenterUK Avatar
Posted By ExperimenterUK
Tue Oct 22 2019, 05:18 AM
wimac Avatar
Posted By wimac
Mon Oct 21 2019, 09:18 AM
I’ve been following this thread and looking at the...
s_dinesh40@yahoo.com Avatar
Posted By [email protected]
Sun Oct 20 2019, 03:09 PM
s_dinesh40@yahoo.com Avatar
Posted By [email protected]
Sun Oct 20 2019, 03:02 PM
sir, when i on display ,sometime 3rd display is no...
s_dinesh40@yahoo.com Avatar
Posted By [email protected]
Sun Oct 20 2019, 02:53 PM
sir, when i on display ,sometime 3rd display is no...
ExperimenterUK Avatar
Posted By ExperimenterUK
Sun Oct 20 2019, 12:21 AM
Your code seems okay on my simulationTry my code o...
s_dinesh40@yahoo.com Avatar
Posted By [email protected]
Sat Oct 19 2019, 07:13 PM
please find video attachment. 3rd & 4th displa...