Hi Christian, I think that even if we use different hardware interfaces to the display (if you have a 3.3 volt display your work will be simpler !) this changes very few things in the code (only the two functions used to send data and commands to the display). The idea of the "framebuffer" approach is quite new for me and I don't know very much about how to operate. but I'm learning :-)
maurizio 2007/2/21, Christian Leu <[EMAIL PROTECTED]>: > > 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]<maurizio.bertero%40gmail.com>> > 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> > <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> > > <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> > > > <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><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> > > > > > <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> > > <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> <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> > > 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]
