Using SPI on 3.5 display with FTDI FT800 controller.

albertsm · Joined: 09 Apr 2004 Posts: 5921 Location: Holland

yes Peter did a great job. i used his code on an xmega.
I am busy making an asm driver for ft800. bascom will support some specific ft800 functions, and for the rest Peters code will be used with some modifications.
for example this code will become ftWR8 sub routine. the test you see below.
Sub Wr8(Byreg r16 As Dword , Byreg r20 As Byte)
!jmp ft_wr8
end sub

some code is used like :

Sub ColorRGB(Bystack R As Byte , Bystack G As Byte , Bystack B As Byte)
'-----------------------------------------------------------
' Set the current Colour of Red, Green and Blue
$asm
ld r20,y+ ; last param passed last so B goes to wb0/r20
ld r21,y+
ld r22,y+
$end asm
setreg r23 , 4
ftsend32 ___DWTMPB , ftstend
End Sub

this make the calling code most efficient. but it uses a new features (well enhanced actually) that allows to pass parameters via the softstack or a register.
so do not waste too much time and better play with the functions.

PeterM · Joined: 09 Jun 2008 Posts: 118

Per

Thanks for the nice words, there has been more code written since that post, the whole Programmers
manual has been converted to Bascom but no point posting that code here since Mark is working
behind the scenes making a Optimised Fast FT800 Library (did I say that correct )Mark Very Happy

which will take some time and will need some testing.

If you can't wait somehow send me your email? and I can give you something to play till
the time comes.

BTW I was so impressed by the demos from FTDI Eve demos and Gameduino2 demos that I had to buy one
of those Displays to have a playl

I noticed a new Datasheet out for the FT801 which is the same as the FT800 but a Capacitive Touch version

Per Svensson · Joined: 03 Oct 2004 Posts: 235 Location: Gothenburg, Sweden

Peter and Mark,

Yes I would certainly like to take part in this FT80x lib progress. My email is PS(at)monolitsystem(dot)se

I strongly feel that this is a driver that we can benefit from many years to come as, together with
this display family, it solves a problem we have faced for many years. Graphic+Touch+Sound
AVR is a great processor but really was not built for heavy stuff like cosine-matrix math and alike.
If we can now unburden all graph tasks and even som 3D, we really have got a newstart for AVR.
So this is really great. Please tell me if there is something I can do to help. If it is within my reach I'll try.

Best regards
/Per

PeterM · Joined: 09 Jun 2008 Posts: 118

Larry

FTDI just released a FT800 emulator, not sure how to use it properly but you can
place Widgets of the screen, move and stretch them, view the parameters etc.

Note: will not run on XP, Vista/Win7 only

http://www.ftdichip.com/Support/SoftwareExamples/EVE/setup%20ft800%20emulator.zip

albertsm · Joined: 09 Apr 2004 Posts: 5921 Location: Holland

it looks nice but i have no clue how to use it.
maybe good to know that some one develops a graphical editor. i have seen a very early beta. idea is that it will support bascom as well.
Peter, Per, i will update you with a new version today. I only need to check out Peters latest mods.

lander72 · Joined: 29 Jul 2007 Posts: 25 Location: Fraser Valley BC

Hi Peter,

I had a chance to look at the FT800 emulator, thanks for the link. A tutorial would be helpful from FTDI.

I am interested in the updates you did to the code. My mail is lander72 at shaw dot ca

Mark, very glad to see that you will be enhancing Peters code. I hope that you get a chance to put together an example
for graphics, touch, and sound similar to the BASCOM manual examples that are such a huge benefit for learning / understanding.

Regards Larry

Per Svensson · Joined: 03 Oct 2004 Posts: 235 Location: Gothenburg, Sweden

I made a small demo showing the Power of this FT800 Graphics Engine driven by an Mega128 at 16MHz
Communication is 4MHz SPI
Resolution is 480x272 pix
All non Graphics programmed in BASCOM
Much of the low level hard work done thanks to Mark and Peter.

http://www.youtube.com/watch?v=3db_Mzy10JI

/Per

factorc · Joined: 09 Sep 2007 Posts: 1

Hi.
Is there already something new because of the FT800 library ?

PeterM · Joined: 09 Jun 2008 Posts: 118

factorc

Aparently it's under development.

apam · Joined: 07 Sep 2009 Posts: 20

How does it look to the library for FT800?

PeterM · Joined: 09 Jun 2008 Posts: 118

apam

As mentioned in the previous post still under development so dates
are unfortunately unknown at the moment but for now, can you
give some examples of what you want to do ?

apam · Joined: 07 Sep 2009 Posts: 20

I am looking for information about the interrupts. I can not seem to adjust. First we set the global interrupt Reg_int_en, after set mask Reg_int_mask and then waits for a signal of INT pin to be able to read reg_int_flags

PeterM · Joined: 09 Jun 2008 Posts: 118

In case there is some trick to it, I searched at some of FTDI's FT800 demos but I cannot
find any reference to how to use their Interrupts (except for reference in the Datasheet).

I wonder if you should email FTDI, but let me warn you a reply may take a while
(unless you call them).

I would not have thought you need to use Interrupts at this stage as you can do pretty much anything
with out them.

apam · Joined: 07 Sep 2009 Posts: 20

ok, do you know how to set Tag value in graphic objects? It is working correctly only for command cmd_keys. Other objects get 255. I do not know how to set it. Now i can use commands Cmd_spinner, Cmd_logo, Cmd_clock, Cmd_button, Cmd_gauge, Cmd_gradient, Cmd_keys, Cmd_callibrattion, all about sound and midi and commands in your example. At the moment I stand at interrupts and add a tag to objects.

apam · Joined: 07 Sep 2009 Posts: 20

inserting a tag I already solved.