PIC18F26K80 IO problem

[pekka1234]

Hey Thelmah

Thanks for helping in IC package.
I looked with thee microscopes, and I wanted to know which is pin 1, but I cant found any marking.
Now I know when i took the device out of the package.
I got help from NPX.
It is only in certain position when it is assembled, no marking.
You can look http://probyte.fi/product_orientation.jpg

==
I have some problems with your LCD driver.
I can't display 'c' and 'd' letters .
Finally I found that it is something in lcd_putc function.
When I took \c and \d out, it worked.
The picture is http://probyte.fi/lcd2.jpg

Here is my modified function:

void lcd_putc( char x ) {
fprintf(Debug,"\rA char %x",x); // sarjaliikenne debug
switch(x) {
case '\f' : lcd_send_byte(0,LCD_CLR_DISP); lcd_line=1; delay_ms(2); fprintf(Debug,"\ f Break ");break;
case '\n' : lcd_gotoxy(1,++lcd_line); fprintf(Debug,"\ n Break \r");break;
case '\b' : lcd_send_byte(0,LCD_MOVE_CURSOR_LEFT); fprintf(Debug,"\ b Break\r "); break;
//'case '\c' : lcd_send_byte(0,LCD_DISP_ON_CURSOR); fprintf(Debug,"\ c Break \r"); break;
//case '\d' : lcd_send_byte(0,LCD_DISP_ON_BLINK); fprintf(Debug,"\ d Break \r"); break;
case '\1' : lcd_send_byte(1,LCD_DEGREE_CHAR); fprintf(Debug,"\ 1 Break \r"); break;
default : lcd_send_byte(1,x);
fprintf(Debug,"\rB char %c %x",x,x); // Serial debug
break;
}
}

Surely you found something in my code fault.

Pekka

[temtronic]

It could be that 'cursor on/off and blink' are NOT part of that LCD module's command set.
While there is a loose 'standard' for LCD module, not all makers of all modules will have all functions,command or features.

[Ttelmah]

Why you have generated a second thread is annoying. Anyway the sheet
you posted is the specification sheet not the datasheet. The unit uses a
ST7066 controller and the full datasheet for this is at:
[url]
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=&ved=2ahUKEwi4zbKW8sCDAxWKQUEAHZGbAsQQFnoECBIQAQ&url=https%3A%2F%2Fwww.sparkfun.com%2Fdatasheets%2FLCD%2Fst7066.pdf&usg=AOvVaw2wR53x8qkO-cCUlbacq18M&opi=89978449
[/url]

As I said, pin1 is not marked, but if you look carefully at the top of the
package, you will find one edge is just fractionally beveled. This edge
marks pins 1...4.

Now what you have posted is not the lcd_putc from the driver we
suggested. Use flex_lcd. It works.

The unwanted inverted comma at the start of your '\c' case may well be
what is making it not work.

[pekka1234]

Thelmah

I finally got from NPX an explanation, where the pin 1 is in their driver,
Look http::/probyte.fi/product_orientation.jpg.
They say it has now identification on the device, only which way it is set to package.
They said that TME has a wrong specification of the device, it is from Phillips.
now NPX made them.
I must help TME.

==
The driver flex_lcd works, but it has some failures, but I have corrected them.
Thank you for showing be a right place.

Pekka

[Ttelmah]

That is insane.
Your link does not work, but not having any directional identifier would
not work on a lot of production lines. The systems we use to build all do
a laser check on the orientation when it is placed.

[temtronic]

I don't understand why spend the time to replace the LCD controller SMT chip ? LCD modules are really, really inexpensive today ! Even if the chip is free, the labour cost to remove/replace far exceeds the price of a new module.

[pekka1234]

The right place is https://www.probyte.fi/product_orientation.jpg

Pekka

[pekka1234]

I use normal LCD modules, but there is not a real datasheet
https://www.tme.eu/en/details/rc0802a-biy-esx/lcd-alphanumeric-displays/raystar-optronics/

[temtronic]

looked at your link....
ST7066U is the controller used for that LCD display
so the link Mr. T posted few answers up IS the datasheet that will contain the information you need.
I'm 100% sure the 'flex_LCD driver' will work for you.

[Ttelmah]

and just to explain further, if you go to the Raystar site itself, select that
module, it states that the control chip is the ST7066, and recommends
you look at the datasheet for that for programming data.
Hence I did a search for that datasheet and posted the simplest link.

This is common. Manufacturers of 'modules' like this do not have the
right to post the actual datasheets for the chips used, since they are copyright
from the chip manufacturer. So instead they refer you to these.
It's in the specification sheet as well. First page:
"IC:ST7066U".