How to move data from array into LCD? (Using LCDOUT)

[CuriousOne]

Hello. I have certain project, it uses a lot of custom characters, and they need to be changed frequently. I've already learned how to read data from eeprom into array, but I'd like to somehow mate array and LCDOUT, so I can slide-in out data, to create visual effects, any idea?

I'm asking for this:

lcdout $fe,$40, $e, $11, $12, $14, $1e, $11, $11, $12

How to replace hex data here with dynamic data from array?

Just in theory, how I see this code in some idealistic BASIC:

DIM GRAPH(8) 'define array with 8 lines
GRAPH(1)=$FE 
GRAPH(2)=$CO ' and so on, example of data in array
For A=0 to 7 ' loop till 8
LCDOUT $FE, $40+A, GRAPH(A) - write bytes to LCD memory
NEXT A

But of course, above won't work in PBP.

[HenrikOlsson]

Section 5.38, LCDOUT:

STR ArrayVar{\count} Send string of n characters

Then of course if you want to do it in the idealistic BASIC way

Graph[0] = $11
Graph[1] = $23
'and so on.
LCDOUT $FE, 1   'Clear the screen
For i = 0 to 7
  LCDOUT Graph[i]
NEXT

/Henrik.

[CuriousOne]

With LCDOUT, I don't want to put new characters on screen, I want to update LCD screen custom character RAM, so process of char redrawing will be shown as animation.

[HenrikOlsson]

What's the difference between writing to DDRAM and CGRAM? Instead of sending the clearscreen command as in the example, send the correct command to access CGRAM and then the data.

/Henrik.

[CuriousOne]

The question is in following. Say, first character RAM starts at $40. And this is address for top line, right? and address for next line is $41 ? I mean, if I do code, where $40 will be incremented by 1 in loop for 7 times, all lines will be written properly?

LCDOUT $FE, $40+A,

is such structure correct?

[HenrikOlsson]

The adress pointer in the 44780 is incremented automatically so if you set it to $40 and send 5 bytes of data they will end up at adress $40-$44 automatically. Just as they would when you write to the DDRAM, you (for example) clear the screen which sets the adress pointer to 0 (first char on first line). Each byte received from there on will end up at "the next" location, right? There's no difference in writing to CGRAM. So if you prefer your idealistic way over using the STR modifer

LCDOUT $FE, $40  ' Set adress pointer to first location of CGRAM
For i = 0 to 7        ' Send 8 bytes of CG data
  LCDOUT Graph[i]
NEXT

At least give it a try and see if it does what you're asking.

/Henrik.

[technotronix]

I think efm8 microcontroller would be helpful.

[HenrikOlsson]

In what way exactly would an EFM8 microcontroller help the OP with his question reagarding using the PBP cpmmand LCDOUT on a PIC microcontroller? Please explain because I don't understand.

I don't know if you're actaully TRYING to help or just plain out trolling but you do realise that this forum is mainly for discussing PICs and specifically the PBP compiler from MicroEngineeringLabs don't you?

You've been here a month, haven't asked a single question (that's totally fine) or given a single answer to anything pertaining to the forum topic. You continue to post totally unrelated links to sites about CCS, Perl, C++, other microcontroller or just plain out spam. I don't get it.

If you really ARE here to discuss PBP and the use of it please accept my appologies for jumping on you but if my feeling is right and you don't even know what PBP is please educate yourself and then stick to the forum topics and stop posting nonsense.

/Henrik.

[Scampy]

In what way exactly would an EFM8 microcontroller help the OP with his question reagarding using the PBP cpmmand LCDOUT on a PIC microcontroller? Please explain because I don't understand.

I don't know if you're actaully TRYING to help or just plain out trolling but you do realise that this forum is mainly for discussing PICs and specifically the PBP compiler from MicroEngineeringLabs don't you?

You've been here a month, haven't asked a single question (that's totally fine) or given a single answer to anything pertaining to the forum topic. You continue to post totally unrelated links to sites about CCS, Perl, C++, other microcontroller or just plain out spam. I don't get it.

If you really ARE here to discuss PBP and the use of it please accept my appologies for jumping on you but if my feeling is right and you don't even know what PBP is please educate yourself and then stick to the forum topics and stop posting nonsense.

/Henrik.

Well said Henrik