3.5" Color LCD code example

[Ioannis]

I feel the same for the LCD. Big with many connections, don't know where to start either.

Also the 3.3 is also setting me back. Would be my first on 3,3 Volts.

Ioannis

[Demon]

Wow, very interesting.

I'm a flight sim enthusiast and plan on building a panel, soon. I'm still debating between using a full size LCD monitor with an overlay panel, or going with multiple small LCDs.

The nice thing with the monitor is that you can get a 19" for under $100 and can have several instrument displays on it; more economical than small LCDs at current prices. And the monitor can be driven directly from the PC at HD quality graphics.

Example panel; a 19" monitor on the left could extend under the 3 smaller dials and a 15" monitor would be sufficient on the right:



As much as I'd love to PIC-my-ride, it's still not cost-efficient yet.

[Art]

Hi, Thanks heaps
If I do look into a gfx LCD I'll probably begin with this one.

The circle drawing routine needs to check if the value for radius is less than 3.
If it is allowed to draw the circle too small it messes up the display,
and also addresses the screen buffer out of bounds, potentially crashing
if either you or the display software isn't checking bounds.

[Art]

Wow! This thing is HUGE!

Is anyone here that can compile and run this demo currently?
Since I stole the circles, it's only fair that I put back diagonal lines
I think it's a very simple mod on what's in my small LCD code.
The screen coords need to be words instead of bytes,
and the midpoint adjusted for words, but it is already unsigned integer math.

[DaveC3]

Art

Are you referring to the clock project I posted in 2011. If so, yes it is big, I have not played with it for a while. Most of my project have no long term purpose. I tinker with things just to see if I can do it. It compiled and ran fine on a 18F4550.


take care

Dave

[Art]

Hi Dave,
You haven't called it a clock:

@ printstr2 25,20, "SSD2119 Controller"
@ printstr2 25,28, "Dave Cutliff "
@ printstr2 25,36, "TFT Color LCD Model Rev 1.0"
@ printstr2 25,44, "320xRGBx240"
@ printstr2 25,60, "PicBasic Pro6.0 "
@ printstr2 25,68, "Sept 8,2010"

It looks like a general demo how to talk to the LCD,
and SD Card, etc. (Quite a head start)
nor do I see any clock code or line draw routines
but I do see circles and straight lines for rectangles.
I assumed you ran into the same problem with integer math,
because normally the diagonal lines come first, then other 2D routines.

[Demon]

Wow, he has PBP 6.0 !

Robert

[DaveC3]

Art

OK, I have another post using the same glcd as a analog clock http://www.picbasic.co.uk/forum/cont...t-Analog-clock

I don't don't recall any problems with the math. You can call any of the graphic routines in any sequence. You need to use a glcd that the display ram can be read. In this case I use the glcd in 8-bit parallel. If you SPI you can not read the display ram so objects get over written. Also with a display this big it is faster to run with parallel rather than SPI.