Post by thread:16x2 LCD LM16255: BF stays 1 after 8th col. [OT]

Hello Piclisters, I'm interfacing LCD modules to the 16F84 in 4 bit mode. Everything is ok with 16x2 'no-name' module equipped with ks0066 but on the LM16255 (16x2) which has a HD44780A00 and 8302B07-2 (or is it M5259 ?) the busy flag doesn't get 0 after writing the 8th char (in normal h'28' mode). If I just ignore the busy flag I can write the 9th one which works as supposed. Is this normal? I'm using the initialization described in Sharps DISPLAY UNIT USERâS MANUAL Dot-Matrix LCD Units (with built-in controllers) p14 (3* 3, 2, 28, 8, 1, 6, C) Stefan Sayer

I just did this night before last with a Truly 16x2 in 4-bit mode, and I didn't see any effect like a busy flag left on. Are you sure you are not reading the wrong nibble? I think you are. The read of the busy flag also includes the current cursor address, and that means position 8 corresponds to a response of 00001000 which you are taking as 10000000 instead. -- James Cameron spam_OUTquozlTakeThisOuTus.netrek.org http://quozl.us.netrek.org/