PIC16f690 LCD Not Working

[hhosteam]

Still have the same problem, any other ideas?

[Archangel]

Are you using this chip on a solderless breadboard or are you using the Low Pin Count Demo Board from Microchip ?
this is you code with only minor tweeks and it works on a solderless breadboard. try grounding the contrast pin #3 on the lcd. This is compiled using MPASM as it is what I always use.

@ __config _INTRC_OSC_NOCLKOUT & _WDT_OFF & _MCLRE_OFF &_CP_OFF
define OSC 4
DEFINE LCD_DREG PORTC 'Set port C for the data lines
DEFINE LCD_DBIT 4

DEFINE LCD_RSREG PORTB 'Set the RS Port and Pin
DEFINE LCD_RSBIT 5

DEFINE LCD_EREG PORTB 'Set LCD Enable bit and pin
DEFINE LCD_EBIT 6

DEFINE LCD_BITS 4
' Set number of lines on LCD
DEFINE LCD_LINES 2
' Set command delay time in us
DEFINE LCD_COMMANDUS 2000
' Set data delay time in us
DEFINE LCD_DATAUS 50

ANSEL = 0
ANSELH = 0
CM1CON0 = 0
CM2CON0 = 0

Cnt VAR WORD

'Start Program
TRISC = 0
TRISB = 0

Pause 500

cnt=0
RPT:
HIGH PORTB.6
LCDOUT $FE,1 'CLEAR LCD SCREEN
pause 500
LCDOUT $FE,2,"CNT=", DEC CNT
Pause 1000
CNT=CNT+1
GOTO RPT
END

[flotulopex]

I applied Joe's code and still can't bring my display to work with this chip (I tried with three).

Never had problems with other chips.

Don't know what's wrong :-/

[Archangel]

I applied Joe's code and still can't bring my display to work with this chip (I tried with three).

Never had problems with other chips.

Don't know what's wrong :-/

What are you getting Roger ? Blocks , anything ?

[Archangel]

Checked it again, and it's fine. here is the hex:

[flotulopex]

Sorry, I'm wrong, it worked for me too.. in the past, also with 16F690.

I may have a problem with my breadboards. Gonna buy a new one today.

Nevertheless, what I see on my LCD display is on it's first line, a row of blocks, slightly visible.

Of course, I tried to change the contrast, but nothing helps.

[Archangel]

Sorry, I'm wrong, it worked for me too.. in the past, also with 16F690.

I may have a problem with my breadboards. Gonna buy a new one today.

Nevertheless, what I see on my LCD display is on it's first line, a row of blocks, slightly visible.

Of course, I tried to change the contrast, but nothing helps.

I never use a contrast pot, I ground pins 1,3,5,16, put power on 2,15 always works for me. Those breadboards get nasty inside, corrosion after the plating wears a bit, the component pins wear the contacts quickly too.