12f675_fuse_about_to_blow!

[LEDave]

I'm on it....

See you tomorrow.

Dave

[LEDave]

I had a go at loading a couple of custom characters with no success, so I thought I'd make my name move across the screen. Here's a part of the program.

The trouble is, on the third line down of the LCD (first square) my name also appears there. Could I when trying to load a custom character have inadvertently done something to the CGRAM setting? I then thought maybe it's the cursor so I turned that off with no joy, name moves across the screen still and also 1'st square third line.

  MAIN:
pause 1000
LCDOUT $FE,$0C    'Cursor off
PAUSE 50
LCDOUT $FE,1,"                    *"
pause 500
LCDOUT $FE,1,"                   *D" 
pause 500
LCDOUT $FE,1,"                  *DA"
PAUSE 500
LCDOUT $FE,1,"                 *DAV"
PAUSE 500
LCDOUT $FE,1,"                *DAVE"

Nice work on the website by the way.

Dave

[mackrackit]

Part of the problem might be the 21 spaces on a 20 character screen??

Post you custom character code and we will see whats up.

[LEDave]

Hi mackrackit,

Oh dear, I can't even count up to 20 now

I've been working on my HEX today, maybe that explains it

Working a treat now thanks, 'again'.

Post you custom character code and we will see whats up.

It's not mine it's Darrel Taylor's, from that link you posted. It's the battery symbol.

MAIN:
PAUSE 500
LCDOUT $FE,$78,$06,$0f,$0f,$0f,$0f,$0f,$0f,$00
GOTO MAIN

Dave

[mackrackit]

The LCDOUT character stuff place at the beginning of your code, in the variable area.

LCDOUT $FE,$40,$06,$0f,$0f,$0f,$0f,$0f,$0f,$00 'This is the first character #0
'The first place in the RAM is $40
'The next character would start with $48
VARS
DEFINES
...

Then in your loop

MAIN:
PAUSE 500
LCDOUT $FE,1,0 'First character
LCDOUT $FE,1,1 'Second character if you have one
GOTO MAIN

[LEDave]

Cheers mackrackit,

Things slowly starting to filter through. I'll have a look tomorrow.

I love the old LCD though, cracking.

Dvae

[LEDave]

Hi mackrackit,

Well I managed to get the program to do what I wanted it to do, namely run through four custom characters then place the four custom characters one in each corner of the display ( program code below).

All the info to do this was found within the LCD link you posted However, I can't really see how the CONSTANT:

Row1  CON 128

works, what does the 128 part of it mean? I guess it must relate to LCD position HEX 0000 DDRAM Address for a 4 Line LCD but can't relate that to a CGRAM character position.

ANSEL   = %00000000    'Disable analog select so ports work as digital i/o.
CMCON0  = %00000111    'Disable analog comparators.
TRISA   = %00000000    'Set PORTA as OUTPUT.
PORTA   = %00000000    'Set PORTA pins all low.
TRISC   = %00000000    'Set PORTC as OUTPUT.
PORTC   = %00000000    'Set PORTC pins all low.

DEFINE LCD_DREG     PORTC    'PORTC.0 WILL CONNECT TO DB4, PORTC3 TO DB7
DEFINE LCD_DBIT     0
DEFINE LCD_RSREG    PORTC
DEFINE LCD_RSBIT    4        'PORTC.4 CONNECT TO LCD PIN4
DEFINE LCD_EREG     PORTC
DEFINE LCD_EBIT     5        'PORTC.5 CONNECT TO LCD PIN6
DEFINE LCD_BITS     4
DEFINE LCD_LINES    4
DEFINE LCD_COMMANDUS 2000     
DEFINE LCD_DATAUS 150

Row1  CON 128
Row2  CON 192
Row3  CON 148
Row4  CON 212

DEFINE OSC 4
LCDOUT $FE,$40,$02,$06,$1a,$1a,$1a,$06,$02,$00 'FIRST  CHAR 0 (Battery)
LCDOUT $FE,$48,$06,$0f,$0f,$0f,$0f,$0f,$0f,$00 'Second CHAR 1 (Speaker)
lcdout $FE,$50,$1F,$11,$15,$17,$17,$15,$11,$1F 'Third  CHAR 2 (Copywrite)
lcdout $FE,$58,$00,$0a,$0a,$00,$00,$11,$0e,$00 'Fourth CHAR 3 (Smiley)
MAIN:
PAUSE 500
LCDOUT $FE,1,0 'First character
pause 1000
LCDOUT $FE,1,1 'Second character 
pause 1000
lcdout $FE,1,2 'Third character
PAUSE 1000
lcdout $fe,1,3 'Fourth Character 
pause 1000 
LCDOUT $FE,Row1+0,0 'Places CHAR 0 Top LHS of display.
PAUSE 250
lcdout $FE,ROW1+19,1 'Places CHAR 1 Top RHS of display.
PAUSE 250
LCDOUT $FE,Row4+0,2  'Places CHAR 2 Bottom LHS of display. 
PAUSE 250
LCDOUT $FE,Row4+19,3 'Places CHAR 3 Bottom RHS of display.
PAUSE 4000
GOTO MAIN

Dave (lovin his LCD).