Interesting result on a 16F688 with ADC and LCD

[wdmagic]

OK I now have something on LCD but its jibberish. I moved chip and lcd to breadboard for time being, PORTC 0-3 is now starting bits, RS is C.4 and E is C.5, nothing else is hooked up except LCD. I will need to turn on ADC for PORTA 0 & 1 after LCD starts working.

heres the code, notes are beside respective lines

DEFINE LCD_DREG PORTC   ' LCD Data bits on PORTD
DEFINE LCD_DBIT 0       ' PORTD starting address
DEFINE LCD_RSREG PORTC  ' LCD RS bit on PORTD
DEFINE LCD_RSBIT 4      ' LCD RS bit address
DEFINE LCD_EREG PORTC   ' LCD E bit on PORTD
DEFINE LCD_EBIT 5       ' LCD E bit address
DEFINE LCD_BITS 4       ' LCD in 4-bit mode
DEFINE LCD_LINES 4      ' LCD has 4 rows
ADCON0 = 0 ' Tried it with and without this line
ANSEL = 0 ' Tried it with and without this line
TRISA = %00000011 ' Left this cause it shouldnt hurt LCD
TRISC = %00000000 
 
LCDOUT $FE, 1 ' Clear LCD
PAUSE 500 ' Wait 0.5sec for LCD to initialize

AGAIN:
LCDOUT $FE, 2
LCDOUT $FE, $80
LCDOUT "This is a Test"
pause 1000
GOTO AGAIN ' Repeat

Theres not much here to go wrong, anyone see anything?

[Demon]

Pause 1000 before 1st LCDOUT to start.

[andywpg]

OK I now have something on LCD but its jibberish. I moved chip and lcd to breadboard for time being, PORTC 0-3 is now starting bits, RS is C.4 and E is C.5, nothing else is hooked up except LCD. I will need to turn on ADC for PORTA 0 & 1 after LCD starts working.

I had trouble without the following two defines (after the ones you already have):

' Set command delay time in us
DEFINE LCD_COMMANDUS 1500
' Set data delay time in us
DEFINE LCD_DATAUS 44

Then try this:

PAUSE 500 ' Wait 0.5sec for LCD to initialize (May need to be one second, depends on your LCD)
DO
    LCDOUT $FE, 1, "This is a Test"
    Pause 1000
    LCDOUT $FE, 1 'clear the screen
    Pause 250 'wait 1/4 second
Loop

No reason the above shouldn't work. Good luck

[andywpg]

OK I now have something on LCD but its jibberish. I moved chip and lcd to breadboard for time being, PORTC 0-3 is now starting bits, RS is C.4 and E is C.5, nothing else is hooked up except LCD. I will need to turn on ADC for PORTA 0 & 1 after LCD starts working.

This may sound like a dumb question, but it IS a Hitachi 44780-comapatable display, right?

Just a thought......