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LCD HD47780 interfacing

i was trying to interface my at89c51ed2 with a LCD however , i got some problem initialize it ..there is a post on www.bipom.com teaching ppl but i do

Re: LCD HD47780 interfacing

Go through this link:http://www.8051projects.net/lcd-interfacing/It will explain you each n everything about interfacing LCD with 8051.

Re: LCD HD47780 interfacing

http://www.edsim51.com/examples.html#prog4see this too

Re: LCD HD47780 interfacing

http://www.8051projects.net/lcd-interfacing/initialization.phpthis page shows that we nid input a 30H as command into it before any other command . Wh

Re: LCD HD47780 interfacing

30H is the init byte for LCD.As i explained there are two types of resets in LCD1. Power on reset2. Software reset1. Power on reset, as name says. LCD

Re: LCD HD47780 interfacing

i had completed the c code for lcd . but i cant run it on my at89c51ed2 . i choose to put 8 data lines at port 0 , and RS,RW,EN at port 2 .do i nid to

Re: LCD HD47780 interfacing

Hi friend,Avoid using Port 0 and port 2 , instead use P1 for 8 bit data and P3 for control lines of LCD. if you insist on using P0 then you need to h

Re: LCD HD47780 interfacing

but the controller that i using is at89c51ed2 pid40 .it have special function on port 1 and 3 that i need to use it for other purpose later

Re: LCD HD47780 interfacing

the answer is in my last post if you insist on using P0 then you need to have 10K pull up resistors, Arun

Re: LCD HD47780 interfacing

@weijieIn your code try increasing the delay in the range of milliseconds.sth like this.....void delay(int time){int t,i;time = time * 2; //each machi

Re: LCD HD47780 interfacing

@sashijoseph the line of " for( i=0 ; i<750 ; i++) " is use to ?eg : lets say i call void delay(160) , then the result delay will be ? crystal t

Re: LCD HD47780 interfacing

Checking Busy flag is always better, bcoz it gives the controller inside the LCD sufficient time to complete what its doing (internally).on the other

Re: LCD HD47780 interfacing

thks alot ~ my circuit are working already ... thks for the help everyone

Re: LCD HD47780 interfacing

void LCD_busy(){ LCD_D7 = 1; //Make D7th bit of LCD as i/p LCD_en = 1; //Make port pin as o/p LCD_rs = 0;

Re: LCD HD47780 interfacing

Hi....In the above code LCD_en = 1; //Make port pin as o/p is not needed.If you look at the LCD timing diagram,a read requires EN->L to H strobe while