http://www.8051projects.net/ Learn to make simple microcontroller projects, pic, 8051, avr and arm projects. download 8051 projects, tutorials, libraries, sample codes. join the microcontroller discussion forum and ask doubts regarding electronics. the best source for 8051 over internet. en-gb 2009-01-07T22:28:46-08:00 contact@nospam.com hourly 1 2000-01-01T12:00+00:00 http://www.8051projects.net/forum-t6481.html 2009-01-07T22:28:46-08:00 hi sir,i'm a freshman of 8051 and i'm going to build a security system as my project.ur Digital Code lock with LCD and Keypad using AT89C2051 is really helpfulbut i have a problem: i'm using 89s52 as my mcu and i want to use port3 to connect the keypad and port0 to connect the LCD. how should i modify the program to achieve it?really need help......THX!!! http://www.8051projects.net/forum-t6481.html 2009-01-07T22:28:46-08:00 Ajay are you going to use a different controller? i mean other than AT89C2051? why P0 and P3? special reasons? http://www.8051projects.net/forum-t6481.html 2009-01-07T22:28:46-08:00 nov2 my project is supposed to be used in a shop, so it will have PIR sensor as detector, keypad to open the door or disalarm the system.actually, i bought a 8951 Single Board Computer from the market and the default LCD port is port0. the 8052 is 40 pins type. http://www.8051projects.net/forum-t6481.html 2009-01-07T22:28:46-08:00 Ajay ok i understood.. but this means.. there might be change of connections.. not same as that of what i used.. In which mode LCD is connected on that SBC?In my project i used LCD in 4-bit mode. http://www.8051projects.net/forum-t6481.html 2009-01-07T22:28:46-08:00 Ajay yes it does matter.. coz the code is written for LCD 4-bit.Just tell me how LCD is connected to 8051.. i mean the connections of LCD pins with 8051's port 1. only then i can see what can be done. http://www.8051projects.net/forum-t6481.html 2009-01-07T22:28:46-08:00 nov2 er...i'm not sure what is LCD mode but i guess is the same as urs. i will check it tonite and tell u.btw, really appreciate ur prompt response!! http://www.8051projects.net/forum-t6481.html 2009-01-07T22:28:46-08:00 nov2 sorry that the default LCD port should be port1... well, i can't find the bit mode, is it a big matter? http://www.8051projects.net/forum-t6481.html 2009-01-07T22:28:46-08:00 nov2 is 2x7 jumper http://www.8051projects.net/forum-t6481.html 2009-01-07T22:28:46-08:00 Ajay looks like LCD is in 8-bit mode.. but i am still not sure.. why don't you see board's manual. you might get some info. Why don't you make a new board? whats problem with that? http://www.8051projects.net/forum-t6481.html 2009-01-07T22:28:46-08:00 cyrexxx @Ajay even i want to change the port ... i am using a at89c52 chip the lcd works fine in p3 ( actually i have adapted your lcd.c and lcd.h for my project ) but when i connected it to p1 or p2 it doesn't initialize (p0 is used for keypad ) i need to use p3 for interrupts . pease help http://www.8051projects.net/forum-t6481.html 2009-01-07T22:28:46-08:00 cyrexxx http://www.8051projects.net/forum-t13387.html http://www.8051projects.net/forum-t6481.html 2009-01-07T22:28:46-08:00 Ajay cyrexxx i have seen your thread, and made a reply there, please try not to post again and again.. http://www.8051projects.net/forum-t6481.html 2009-01-07T22:28:46-08:00 cyrexxx i am sorry ajay ..i wan't sure where i should post as my prob is related to this one