LCD Problem

[Sphere]

Wired all data lines but still have the same issue, but it looks like it treats lines 1 & 2 as line one and lines 3 & 4 as line two. Is there any limitation in picbasic pro's lcdout command for this type of display. The display type is Batron BTHQ42003AV, ive ordered a replacement anyway just in case this one is faulty.

Thanks Sphere.

[skimask]

Wired all data lines but still have the same issue, but it looks like it treats lines 1 & 2 as line one and lines 3 & 4 as line two. Is there any limitation in picbasic pro's lcdout command for this type of display. The display type is Batron BTHQ42003AV, ive ordered a replacement anyway just in case this one is faulty.

Would've been a lot more helpful to have the model information a lot earlier.
The model you've got has a controller that isn't 100% Hitachi 44780 compatible.
Seems it likes to work in blocks of 12...which would probably explain your issues.
In the case of this LCD, the standard 1st line ($80), 2nd line ($C0), 3rd line ($94), 4th line ($D4) addresses aren't going to work.
Here's the link to the datasheet:
http://www.datasheetcatalog.com/data...6712UA02.shtml
Read thru it a bit. You may/may not see what I mean...specifically page 364, 384, and 419.

[Sphere]

Is the display not compatable with pic basic and do you know what the EXT pin is.

Thanks Sphere.

[skimask]

Is the display not compatable with pic basic and do you know what the EXT pin is.

Thanks Sphere.

I'd say it's 'compatible enough', it just needs different parameters than what the PBP manual calls for.
From the quick read I did of that datasheet (the rest is up to you), it looks to me like the left 12 characters can be accessed normally, like it was a regular 12x4 display. But to get to the right 8 characters, you have to use that pin in some way.
It's either that or write your own routines to handle the display...

[Sphere]

Thanks for trying, I guess I will have to find an alternative display. If anyone out their can help with an alternative display which is compatible with pic basic but also has the same dimensions as the display I quoted it would be appreciated.

Thanks again skimask for the extended effort.

Sphere.

[skimask]

Thanks for trying, I guess I will have to find an alternative display. If anyone out their can help with an alternative display which is compatible with pic basic but also has the same dimensions as the display I quoted it would be appreciated.

I don't think you need a different LCD. A little bit of reading will most likely get this LCD working for you just fine.

[Acetronics2]

Hi,

it appears the "extention driver" must be enabled for character > 12 th column ...

solution is in the KS 0073 Datasheet, page 27 bottom ...

Good reading

Alain

[mister_e]

The HD66712 software is upwardly compatible with the LCDII (HD44780) which allows the user to
easily replace an LCD-II with an HD66712. In

it's compatible... hardware problem...