How to drive a noritake CU20045SCPB VFD

[The Puma]

Is it possible the use the standard lcd.c driver with some modifications?

Here is the datasheet:
http://www.vfdworld.com/techdocs/Noritake_CU20045SCPB-T23A_4x20_VFD.pdf

Is there someone that already has working a driver with a Noritake VFD

[rberek]

A quick search of this board has shown that there are others who have sucessfully used a Noritake VFD, and these posts have included some code.

The parallel port on the VFD might be easily driven by the CCS LCD driver, though it does seem to want an 8-bit data interface. The serial port on the VFD might be a straight forward RS232 interface.

Get the detailed datasheet from Noritake and take a shot at writing a driver for it yourself.

[The Puma]

My VFD is not LCD Compatible
What must i change to get it to work?

[rberek]

If it is not compatible with the CCS-provided LCD routines, then you must obtain the detailed datasheet from Noritake, decide on whether to use the parallel or serial interface, then code a driver that does what you need.

I have no idea what you have to change, since I've not used one of those displays nor do I have the detailed datasheet. Noritake provides a more detailed datasheet if you ask them, or at least that's what they're website says.

The LCD routines are intended to talk to a certain type of LCD controller. If your controller is significantly different, then it is easier to write a new driver than change the old one. There's nothing magic about those routines that forces you to use them as a template for new ones.

[The Puma]

[rberek]

The datasheet you posted has a URL on the bottom. I went there and found they have sample software for their modules. Not in CCS C, but it would be a start.

http://www.noritake-elec.com/software_examples.htm

and they have detailed data sheets for the same family of VFDs you intended to use. Not exactly the same one, but the interfaces are likely the same.

http://www.noritake-elec.com/GetSpecificationNew.asp?part=CU20045SCPB-T28A&full_id=1269&reduced_id=1161

But I have to ask. Why didn't you go there and check things out?

[The Puma]

Thx, i have ask them

[klovewell]

I've driven these displays from the serial port, it was a while back but I seem to recall it was pretty easy. I'd recommend you start there.

Kirk

[Mark]

[The Puma]

Yes, did nobody exeriment with this part and have some code to try

[Mark]

[PCM programmer]

But if you look at the spec he posted, it doesn't list the signals for a
standard HD44780-type LCD interface. It doesn't have the standard
signals, such as E, RS, and R/W.
http://www.vfdworld.com/techdocs/Noritake_CU20045SCPB-T23A_4x20_VFD.pdf

Noritake makes a "U" version, which they say has a LCD compatible
interface:
http://www.noritake-elec.com/uversion.htm
From the link above:

[The Puma]

It must be possible to drive this VFD with a PIC
Or ist't?

[PCM programmer]

Sure, it's possible. Go to VFD World and get the full spec for LCD.
http://www.vfdworld.com/techdocs/Noritake_CU20045SCPB-T28A_4x20_VFD.pdf
On page 13 (in Acrobat reader) it shows the default settings for the
serial interface are 19.2 Kbaud, with Even Parity. The timing diagram
on page 11 (in Acrobat reader) shows that a Start bit is a logic zero.
So you could use the hardware UART pins on your PIC. Connect the
Tx pin on your PIC to the Sin pin on the LCD. The LCD appears
to require a 1 ms pulse (minimum) on the \Reset pin in order to
initialize it. Then you must wait 100 ms after that before sending
serial commands. This is all shown in the data sheet link given above.

I don't want to do any more work on this.

[The Puma]

@PCM programmer

Thx for the full datasheet.

Please can you tell me what to do for using the hardware UART of the pic18F4620

I have this header
#include <18F4620.h>
#use delay(clock=20000000)
#fuses HS,NOWDT,NOBROWNOUT,NOPUT,NOLVP,DEBUG,NOSTVREN,NOPROTECT