TV Graphical display - help needed

computer guy

Hi everyone,


I need help writing some code that can use the graphics driver to display 5 squares on a tv.
The squares will be in a horizontal line and be:

Green Red Yellow Blue Orange.

They will need to be able to be hidden.

If green == true
  showgreen
else
  hidegreen

Something like that.


I have never done graphics programming on the prop or any device for that matter.


Any help would be greatly appreciated.

Thank you

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Building Blocks To The Propeller Chip A web site designed to help people who are new to the propeller chip.

Guitar Hero controller using the prop (WIP) --> HERE

stevenmess2004

That's going to be a little difficult because the graphics driver only works with four colours per tile. So, since you want at least 6 colours your going to have to make sure that the boxes are all on different tiles and then set up different colours on the different tiles.

Other than that just grab the graphics demo and start playing with it. Its fairly easy to use.

computer guy

The squares will always be in the same location.


The squares will just appear or disappear.
I have tried playing with the graphics demo in this thread.
http://forums.parallax.com/showthread.php?p=752119

However have gotten no where.


Thank you Steven

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Building Blocks To The Propeller Chip A web site designed to help people who are new to the propeller chip.

Guitar Hero controller using the prop (WIP) --> HERE

Rayman

What you want is really easy without graphics! Just change the color of the tiles in question.

After clearing the screen, all screen tiles is the tile array are the space tile with some color, usually black. So, just make new solid colors in the color table.

Then, either replace tiles in the tile array with space tiles with the appropriate color, or just change the bits in the tile array that correspond to color (I think th elower 6 bits in each word).
Each tile is represented by a word in the tile array.

computer guy

I have never programmed with visual displays.
I understand that I need to set the tiles colors in the tile array but have no idea how.


Thank you Rayman

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Building Blocks To The Propeller Chip A web site designed to help people who are new to the propeller chip.

Guitar Hero controller using the prop (WIP) --> HERE

Rayman

Well, the simple way would be to start with TV_Text or TV_Text_Demo... Just use TV_Text's OUT function to change color, set cursor position, and output spaces (OUT(32) should print a space in the current color.

Ariba

Here is a little Demo, of that what Rayman says:

CON
  _clkmode = xtal1 + pll16x
  _xinfreq = 5_000_000

OBJ
  text : "tv_text"

PUB start | i
  text.start(12)
  text.setcolors(@myPalette)
  repeat
    text.out(0)
    repeat i from 1 to 5
      text.out(12)                'set color for block
      text.out(i)
      text.str(string("      "))  'draw block (6 spaces)
      waitcnt(clkfreq>>2+cnt)
    waitcnt(clkfreq+cnt)
    text.out(1)
    repeat i from 1 to 5
      text.out(12)                'clear color for block
      text.out(0)
      text.str(string("      "))  'draw block
      waitcnt(clkfreq>>2+cnt)
    waitcnt(clkfreq+cnt)

DAT
myPalette  byte $02,$02   'black/black
           byte $02,$D8   'green/black
           byte $02,$38   'red/black
           byte $02,$9E   'yellow/black
           byte $02,$88   'blue/black
           byte $02,$18   'brown/black

Andy

computer guy

Thank you both.

Just a quick question, where can I find the color codes?

Andy, your example is exactly what I need.

Thank you

▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
Building Blocks To The Propeller Chip A web site designed to help people who are new to the propeller chip.

Guitar Hero controller using the prop (WIP) --> HERE

Ariba

I use 'Graphics_palette.spin' from the Library Examples for the color codes.

Rayman

I've got a tabulated screen capture from that program here:

http://www.rayslogic.com/propeller/Programming/TV_Colors.htm