Need idea hove to..?

[skimask]

Try increasing the 'startup pause', give the LCD more time to start itself before you start sending data. Double check your contrast wiring/voltage.

[phoenix_1]

Try increasing the 'startup pause', give the LCD more time to start itself before you start sending data. Double check your contrast wiring/voltage.

Hi skimask I was probe 1000 ms pause on startup and was probe on same pcb 2x16 chr it work and last solution is to lcd is fabric dead or bad ?!

pinout is same on 2x16 and that 4x20 and when 2x16 work and that not must be something with 4x20 wrong or maybe is problem in pbp2.50 maybe some bug ????

Really it is big problem for me...
Many thanks to all who was and will probe to help me !

Regards

p.s " The diference is only in define of no:. of lines betwin 2x16 and 4x20. and with same hardware 2x16 work and 4x20 have after reset time back all chr on screen !"

[mackrackit]

Do you have pin #3 on the display going to a pot as a voltage divider for contrast?

[phoenix_1]

Do you have pin #3 on the display going to a pot as a voltage divider for contrast?

You have 100% good question !!!!
When I was use 2x16chr display it have bad contrast and I was see TEST on it,but 4x20 have extra contrast and with same value all poligons are black at these oment I was reduce fix resistors on network on pin 3 and problem go out I can look normaly and 4x20 work fine.

The best thing is have mentors out of personal laboratory !
Other can find what you cant in your project ;-)).

The best regards to all

[skimask]

So, can we infer that all is well now and is working ok?
(a few things are getting lost in the English translation )

[phoenix_1]

So, can we infer that all is well now and is working ok?
(a few things are getting lost in the English translation )

Yes my dear friend work 100% ok.
Many hank's o all you !!!
I little think about some small problems but in core all work good.

Here is little more about what I probe to do.

In project I have one RS232 conection via hser in 877 to pc via max 232,one 4x20 chr lcd (that problematic hehehe) and 4x4 matrix keyboard.
Device must work on next way:
1.it must send no:. of key what is push by persone who use it.
2.in middle time it must display what return application from pc via rs232 on lcd.
3.application return some instructions like words like "DOG" or "CAT"or...and position where it will be displayed on lcd by line and row - position in line 1,2,3 or 4.
It is something like terminal for PC.

For now I success send key no:. with mister_e rutine for matrix keyboard
But I stil look hove to configure that famose from PC to PIC...

Maybe somethin like 1,5,DOG or ???
And hove to I decode that ?

I was use 877 with Nokia 6210 and there I was use skip xxx chr and get message and decode it like bite but here I dont know hove to start.


Regards to all ( any suggest is welcome).

Sorry for bad english again !!!

Robert

[mackrackit]

This might get you started.

Read all data from the PC into an array in the PIC.

[WAIT("?"),STR NUMS\8]

The above will wait for "?" (could be whatever you want) and the next part will put the rest of the data in an array that has 8 places.

The array will start at 0, so if you wrote it out it would look like this:
NUMS[0]
NUMS[1]
NUMS[2]
NUMS[3]
NUMS[4]
NUMS[5]
NUMS[6]
NUMS[7]

Now you can make each part a variable that is a bit easier to work with:
X1 = NUMS[0]
X2 = NUMS[1]
X3 = NUMS[2]
X4 = NUMS[3]
X5 = NUMS[4]
X6 = NUMS[5]
X7 = NUMS[6]
X8 = NUMS[7]

Now lets say X1 is equal to 1 and you want to start display at line 1 position 2.

LCDOUT $FE, $80 + X1

$80 is line 1 position 1. (refer to the manual for more)

Now to display some of the other data:

LCDOUT $FE,$80 + X1,X2,X3,X4

X2 = D
X3 = O
X4 = G

Something like that maybe.