LCD 4X40 Futurlec

[Bill Legge]

Murali,

1. The pin-out on the Futurlec site is wrong - a 4X40 MUST have two ENABLE pins.

2. Rixter says he has got the device working using the pin-outs on my first post of this thread. They didn't work for me but I may have made some wiring/software error. These are the revised pin-outs sent to me by Futurlec.

3. Take up his offer of assistance - after months of messing around with 4X40 LCDs I am starting to think they are not worth the trouble.

4. It's quite irritating that Futurlec can not be bothered to put up the correct data on the web. I know their prices are rock bottom and they need to keeep costs down but it's only a few minutes of work?

Regards Bill Legge

[murali]

Dear Rixter & Legge,
Thanks for your prompt reply. Now my display is working for the first two lines or the second two lines. I am trying to complete the same

Rgds

Murali

[rixter]

Murali,

I am guessing that what you are saying is that you can get either the first two lines or second two lines to work, but NOT both at the same time.

I'd say if you are getting all four lines to get something that you are well on your way to success and you have some minor code issues to check.

You could have a couple of things going on there. You may be putting the LCD into a condition where the unit is resetting (initializing), as you do each write cycle. Or you could be doing a screen clear of the opposite set of lines that you are displaying. For example, you might be clearing lines 3 & 4 as you write to 1 & 2 and clearing 1 & 2 as you write to 3 & 4.

My code would be different than what you would use because I am using a BASIC Stamp, but the logic should be the same. In my case, I am clearing lines 1 & 2, then writing to lines 1 & 2. Then I clear lines 3 & 4 before writing to lines 3 & 4.

Rick