Post by thread:[PIC]: Scroll down an LCD

Good day to all! Is it possible to scroll down an LCD? Thank you very much. ____________________________________________________________________ Get free email and a permanent address at http://www.netaddress.com/?N=1 -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

>Good day to all! >Is it possible to scroll down an LCD? >Thank you very much. It depends on the kind of LCD you are using. If you are using a GRAPH LCD it's easy. But an alphanumeric... --------------8<-------Corte aqui-------8<-------------- All the best!!! Alexandre Souza spam_OUTxandinhoTakeThisOuTinterlink.com.br Linux User #85093 --------------8<-------Corte aqui-------8<-------------- -- http://www.piclist.com hint: The list server can filter out subtopics (like ads or off topics) for you. See http://www.piclist.com/#topics

Yes - as long as you are willing to calculate the new positions for the charactors to go to (*REAL* simple actually). The displays are made up of 'lines' which are a maximum of 20 chars long. A 4 x 40 char display actually has 8 'lines' on it arranged something like - D1L1 D1L3 D1L2 D1L4 D2L1 D2L3 D2L2 D2L4 Note that there are multiple Display controllers putting chars onto multiple Lines on the one physical display. You need to map out your display (by writing each of the strings above to 0x20 chars apart) on the 2 displays (toggle the 2 select lines to swap displays). Once you have the logical map for your particular display layout the rest is easy. Each physical 20 char 'line' actually has about 32 memory locations that can be scrolled horizontally across the physical space. If you lock the horizontal scrolling and synchronize the logical and physical display positions (home) it is possible to map your message in software and then poke the chars into the desired positions (the displays have commands for this that execute in about 30us per char - very fast). Bye. > {Original Message removed}