Dear Maurizio I will see if i can put my display in serial mode. Actually i decided to use the bolymin OLED Display because it's working at 3.3V Signal Level. I dont use a lot of ports. But actually, i'm very interessted in your Framebuffer approach. Even if i will do a version for parallel connection we can share the informations.
http://www.bolymin.com.tw/Doc/BL12864G.pdf I like to not use any aditional hardware between display and foxboard to reduce cost's! I'm waiting for some more information about your actual solution Christian On 2/21/07, maurizio bertero <[EMAIL PROTECTED]> wrote: > > hi Christian, > I've got no problem to share what I'm doing, give me a couple of days to > put > some order in my code and add some comment. > My interface with the LCD is not full "parallel". I used a couple of shift > register (two 74HCT165 cascaded each other) to make a simple SPI interface > drived with "bit bang" method from the FOX. Only the "E" signal is > directly > conected to the FOX. The interface is monodirectional (I don't use the > READ > method on the display). I've done this unusual hardware interface for > following reasons: > 1) Save I/O pins (I/O are never enough!). I use only 3 I/O: clock,data and > Enable signal > 2) simplify the 3.3V vs 5V logic interface. Altough some people take not > care of this, we must not forget that FOX outputs are 3.3V logic levels > but > LCD input are 5V logic level, so some kind of level adapting must be done. > Using the 74HCT family powered at 5V the level shift problem is > automatically solved. > > Maurizio > > 2007/2/20, Christian Leu <[EMAIL PROTECTED]<christian.leu%40gmail.com> > >: > > > > Dear Maurizio > > I think this would be a good idea. To share efforts to make a nice > > solution. > > I will start with implementing the display in beginning of next week. > > Could > > you send me what you allready have? And how you will connect your > display > > to > > the foxboard? I assume you will use the parallel connection and not a > > serial > > connection? > > > > Thank you > > > > Christian > > > > On 2/20/07, maurizio bertero <[EMAIL > > PROTECTED]<maurizio.bertero%40gmail.com> > <maurizio.bertero%40gmail.com>> > > wrote: > > > > > > hi Christins, > > > since we have the same target, we can try to work togheter at this > > issue. > > > I'm writing my "own" custom library to drive the lcd, but if we can > > > develop > > > a framebuffer driver we will be more "open" to the linux system and > take > > > advantages of its graphical tools. > > > > > > Maurizio > > > > > > 2007/2/20, Christian Leu <[EMAIL PROTECTED]<christian.leu%40gmail.com> > <christian.leu%40gmail.com> > > <christian.leu%40gmail.com> > > > >: > > > > > > > > Hello John, hello Maurizio > > > > I also plan to use a graphic display from Bolymin with a SSD1303 > > > > Controller. > > > > This one should be similar to KS108 Driver. > > > > > > > > As you wrote, you made a FB for the foxvhdl. Do i need a foxvdhl or > > can > > > we > > > > connect the display direct to foxboard as i have planned? > > > > > > > > The Library from Maurizio seems very interesting. > > > > > > > > Thank you for any information. > > > > > > > > Christian > > > > > > > > On 2/19/07, John Crispin <[EMAIL PROTECTED] > > > > <john%40phrozen.org><john%40phrozen.org><john%40phrozen.org><john%40phrozen.org>> > > > > wrote: > > > > > > > > > > Hi > > > > > > > > > > sure, i made a FB for the foxvhdl... what exactly do you need to > > know > > > ? > > > > > > > > > > John > > > > > > > > > > Quoting maurizio bertero <[EMAIL > > > > > PROTECTED]<maurizio.bertero%40gmail.com> > <maurizio.bertero%40gmail.com> > > <maurizio.bertero%40gmail.com> > > > <maurizio.bertero%40gmail.com> > > > > <maurizio.bertero%40gmail.com> > > > > > >: > > > > > > > > > > > Hello, > > > > > > I'm thinking about developing a framebuffer driver for a simple > > > 128x64 > > > > > lcd > > > > > > display (KS108 driver chip). > > > > > > I've found the source code of the driver here, > > > > > > http://lwn.net/Articles/138383/ > > > > > > I'm able to modify the driver to adapt it to the FOX specific > I/O, > > > but > > > > I > > > > > > need some help about the process of compiling and adding the > > driver > > > to > > > > > the > > > > > > fox enviroment. > > > > > > > > > > > > Can anyone help me or point me to the right direction ? > > > > > > > > > > > > > > > > > > Thank you in advance for your help > > > > > > > > > > > > Maurizio > > > > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > > > > Christian Leu > > > > Sulgeneckstrasse 37 > > > > CH-3007 Bern > > > > > > > > MOBILE +41 79 474 82 11 > > > > ICQ: 124663788 > > > > MSN: [EMAIL PROTECTED] <me%40relab.ch> <me%40relab.ch> <me%40relab.ch> > <me%40relab.ch> > > > > > > > > Machen Sie mit bei Xing und erweitern Sie Ihr Netzwerk: > > > > http://www.xing.com/go/invite/3226960.212cd5 > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > > > > > > -- > > > > Christian Leu > > Sulgeneckstrasse 37 > > CH-3007 Bern > > > > MOBILE +41 79 474 82 11 > > ICQ: 124663788 > > MSN: [EMAIL PROTECTED] <me%40relab.ch> <me%40relab.ch> > > > > Machen Sie mit bei Xing und erweitern Sie Ihr Netzwerk: > > http://www.xing.com/go/invite/3226960.212cd5 > > > > [Non-text portions of this message have been removed] > > > > > > > > [Non-text portions of this message have been removed] > > > -- Christian Leu Sulgeneckstrasse 37 CH-3007 Bern MOBILE +41 79 474 82 11 ICQ: 124663788 MSN: [EMAIL PROTECTED] Machen Sie mit bei Xing und erweitern Sie Ihr Netzwerk: http://www.xing.com/go/invite/3226960.212cd5 [Non-text portions of this message have been removed]
