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I mainly use Optrex displays and never have problems with them.
Maybe I've been lucky, but I just thought I would mention it. :)

Your code doesn't resemble the code example in the manual:

b = 500
c = 1000
dummy = b * c
a = DIV32 100

Your code:

Periode2 = Periode / 2

People tend to use graphics controllers or standard video with the larger screens.
The Optrex 3" is the biggest one I know of that can be used with just an SPI
interface to control it (and write...

Optrex has a sweet TFT that can be controlled by an SPI interface:

http://www.optrex.com/products/partdetail.asp?PartNumber=T-55149GD030J-MLW-AJN

That link doesn't seem to be working. I did a google search and all links for that file are from
that website. They must have moved the file.

I remember someone asking about this IC in the past, so I thought I would post a link to
a website that I just created for some cool designs/applications that I don't have a use for,
but maybe...

Sweet!
I actually requested 32-bit integer math a few months back.
I can't wait!

I'll try that. Thanks!

By the way, I use

DEFINE LCD_COMMANDUS 2000
DEFINE LCD_DATAUS 100

for the LCD timing. If you go faster on the data, such as 50 us, then
the Optrex 4-line display will be garbled.

;)

My bad. I had the lcdout subroutine improperly exiting...

for example:

GOSUB display
disp_return: next line of code, and so on


display: LCDOUT "blah, blah,...

I'm having trouble with an Optrex 4x20 LCD module. I have had no problems
with the 2x20 with a very similar program. It seems to ignore all "0"s in the
text string. This is using the LCDOUT command...

I use a math equation for a PAUSE value on one of my designs and it works
fine. The equation depends on a continously changing variable. Sometimes
the result is 0.

Yes, 12 volt systems. For 24 volt systems, I would use a 33 or 36 volt TVS.

I'm sure the hserin will work, but I like to read the port directly. Here is a
program that I wrote 3 years ago for a 909 kick drum copy that I built. It worked
great. It only responded to one MIDI...

I've worked in the US Auto industry for over 20 years and standard procedure
these days is to use a TVS. They are quite durable. Zener diodes can't handle
the current of a large spike. I use a 24...

Yeah, I didn't delete that part.

Thanks for the help!

Success!!!

First, I tried deleting the whole "else" section with the delays. My circuit worked
OK, but the active pulse width was less than 400ns. Too short for me to feel
comfortable about...

It would be no small task inserting an assembly routine... I would have to insert
many routines. I also don't know assembly very well. Speaking of assembly, is
it possible to modify the...

OK, at 20MHz with a PIC18F2520, the clock rate for SHIFTOUT is 5.2 us or
192 KHz. It would be nice to get this clock rate up to 500 kHz or even 1 MHz.
I'm open to ideas or suggestions.

[Edit]...

That's interesting. I will check it with a scope today. I run the circuit at 20MHz
right now and didn't want to bump it to 40MHz because it would completely
change my datalogging scheme which uses...

Is there any way to get the clock rate higher than 50kHz? Has anyone
contacted ME Labs about this? I need more speed!!! Just checking before I
change the design to use the hardware MSSP.

Try mister_e's method... mine sucks in that frequency range. It works fine
below 1 kHz, which works for my application.

OK, now I'm feeling kind of stupid... the flash program configuration also affects
the EEPROM, not just the program memory. Configuring the target device to
Enable Flash Programming allows the...

How accurate does it have to be? If it can be off by a few Hz, then you could
try my method. I don't have the code on this computer, so I'll try to explain it.

Use an interupt input such as INT0...

All interupts are disabled, as always. I poll the interupt flag to look for a rising
edge on the interupt ports. This program is not any different from other
programs I have written, in regards to...