Post by thread:[EE]: LCD-second line problem

Hi, what is a possible problem when i set the ddram adress to 01000000 and the cursor moves to the second line in the beginning but when i write the cursor moves to the right without displaying any characters? -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

Hi! > Hi, what is a possible problem when i set the ddram adress to 01000000 and the cursor > moves to the second line in the beginning but when i write the cursor moves to the right > without displaying any characters? Hmm, i had a similar (maybe the same) problem in a project using a 2x16 LCD display. (the cursor was switched off and nothing appears in the second line) The problem was the initialisation of the display. I sent the command right, but the power up/reset of the display was wrong. I fixed that with power up delays befor write the first time to the display, and send the initialsequence (b'00101000' ; 4 Bit + 2 Lines + 7x5) two times. (maybe the first fault due wrong power up) Maybe this will help ... just try it. cu, Doc ... -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads

Most common problems are related to invalid reset at power-up. Make sure that the power supply is up to the required voltage *AND* steady before sending the reset code to the lcd *3 TIMES* followed by a change to 4/8 bit mode with a *LONNNNGGGGG* pause for everything to be done (about 1/5 of a second all up). Most lcds are fine after a *SLOW* initialization, but almost anything can happen if you start sending commands *BEFORE* the initialization is complete (it may appear to be working, but not all of the parts have been reset - like your second line display command problem). Bye. > {Original Message removed}