LCD_IO 4 Help Please

[Anobium]

Are the any issues with the LCD_IO 4 code?

I know the LCD is ok. But, I get nothing display when using GCB.

This is my program.

Thank you. Most grateful for any help.

#config OSC = INTRC_OSC_CLKOUT
'Chip settings
#chip 16F627, 20

'LCD settings
#define LCD_IO 4
#define LCD_DB4 portb.4
#define LCD_DB5 portb.5
#define LCD_DB6 portb.6
#define LCD_DB7 portb.7
#define LCD_RS portb.3
#define LCD_Enable portb.2
#define lcd_no_rw

InitTimer1 Osc, PS1_1/8
StartTimer 1
CounterValue = 0

Wait 100 ms
Print "Int Test"

On Interrupt Timer1Overflow Call IncCounter

Do
    CLS
    Print CounterValue
    Wait 100 ms
Loop

Sub IncCounter
    CounterValue ++
End Sub

[Nobody/Anonymous]

Do you managed the contrast?. potenciometer is ussually used, when power on, 1st line of lcd ussually show black squares.

[Nobody/Anonymous]

It is a timing issue.  I have changed LCD.h to cater for this cheap LCD device.  You get what you pay for!

I will test again with the original LCD.h today to ensure that is the root cause of the issue.

Thank you.

[Anobium]

However, it could be because I had fours ports floating…..

Would this cause some issues?  :-)

[gcha44]

Hi ,
It seems there is no clock .
I think Intrc_osc_clkout only works with 4 Mhz , but not 20Mhz
So you must write #chip 16F627,4  preferably before #config OSC=Intrc_osc_clkout
Regards
GC

[Anobium]

Thank you.

So, the #chip…. must come before config of the clock.

I have made the changes TO 4 Mhz.

Thank you.

I will leave on test tonite.