When you initialize the LCD Module (after power up) , You should init the module for 2 Line operation. Whenever you do NOT see the DOTs on the 2nd line, this means that the Driver is in One Line Mode and only multiplexing the TOP Line of the LCD. I would suggest that you?inspect your Init routine for this revision.? (This only needs to be setup once after power up). -----Original Message----- From: Steve Maroney To: Microcontroller discussion list - Public. Sent: Fri, Jul 10, 2009 11:16 pm Subject: RE: [EE] Trouble on 2nd line of LCD Also, I think I should add that If I turn the contrast all the up, to where I cant read the chars and see square blocks, I thought I would see the second row blocks, as I do the first row, but I only see the first row. Hopefully that makes some sense. Best Regards, Steve Maroney Business Computer Support, LLC Mobile Phone:504-914-4704 Office Phone: 504-904-0266 Fax: 866-871-7797 -----Original Message----- From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of Steve Maroney Sent: Friday, July 10, 2009 10:31 PM To: Microcontroller discussion list - Public. Subject: RE: [EE] Trouble on 2nd line of LCD 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. Anyone 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 ; 8bit, 2 line, 5x7 resolution movwf PORTC then I pulse the EN bit movlw 0x0C ; display on, cursor off movwf PORTC pulse the EN bit again movlw 0x01 ; 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 -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist