I agree with the suggestions mentioned so far, especially regarding
the timing. One other item: some LCDs are 4-bit only, even though
there are pins for 8 data bits on the PCB.

Sean


On Fri, Jul 10, 2009 at 11:31 PM, Steve Maroney<steve@bcsupportllc.com> wro=
te:
> Dear gang,
>
> I have this LCD: http://www.futurlec.com/LED/LCD16x2.shtml
>
> I can write chars to the LCD and seems to work ok but when I move the
> cursor to the 2nd line, and write to the LCD, nothing is displayed.
>
> To move the cursor the 2nd line, I clear the RS bit, send 0xC0, then
> pulse the EN bit.
>
> The code works as expected on the OSHON PIC IDE/Simulator. =A0Anyone have
> any ideas on what im doing wrong ?
>
> Before writing characters to the LCD, I have this small function to
> setup the LCD:
>
> First I bring the RS bit low and bring the EN bit high
>
> movlw 0x38 =A0 =A0 =A0; 8bit, 2 line, 5x7 resolution
> movwf PORTC
>
> then =A0I pulse the EN bit
>
> movlw 0x0C =A0 =A0 =A0 =A0 =A0 =A0 =A0; display on, cursor off
> movwf PORTC
>
> pulse the EN bit again
>
> movlw 0x01 =A0 =A0 =A0 =A0 =A0 =A0 =A0; clear LCD display
> movwf PORTC
>
> pulse the EN bit again
>
> finally I bring the RS bit high before returning from the routine.
>
>
> Best Regards,
> Steve Maroney
>
> Business Computer Support, LLC
> Mobile Phone:504-914-4704
> Office Phone: 504-904-0266
> Fax: 866-871-7797
>
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