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[Linux-fbdev-devel] Re: Problem with BitBLT
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From: <fre...@st...> - 2003-07-09 19:29:54
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I=27m a bit concerned about the tenth bit in the BR04 register=2E Datashe=
et (page 325) says=3A
=2210 Source select
0=3A Configures the BitBLT engine to read the source data from the =
frame buffer =2E=2E=2E
1=3A Configures the BitBLT engine to accept the source data from th=
e host CPU via the BitBLT data port =2E=2E=2E=22
So if we want copy VRAM-=3EVRAM bit 10 should be 0 - no=3F
Regarding BR04 (bits 0-7)=3A
Since 0xFF is the =22write all 1=3As=22 and you see a small block=2C I be=
lieve you are correct when you think the problem is with the transfer fro=
m System RAM -=3E VRAM=2E The 0xCC should though be what we need=2E=2E=2E=
(source copy)=2E
Maybe you could try moving the source data to a different offset than 0=3F=
If there are any issues with overlapping=2E=2E=2E
Filling the entire VRAM with a pattern could perhaps also help in find th=
e problem=2E
Regards=2C
F=2E S=F6derquist
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HI!
=20
Iam trying to program the Bit BLT engine of 69030 with the attached =
code, but nothing is visible on the screen.
When I select the bitwise operation as 0xFF(write to BR04) ,the white =
block is coming at desired location and of desired size.
But whwn I choose it as 0xCC nothing comes on screen...
Can any one please help me out of this......
THANKING U IN ADAVANCE
regards,
=20
Nitin Mahajan
mail:ni...@so...
Ph:51101667. Mobile : 9886099925
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
The Lord gave us two ends -- one to sit on and the other to think with. =
Success depends on which one we use the most.
=20
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<HTML><HEAD>
<META HTTP-EQUIV=3D"Content-Type" CONTENT=3D"text/html; =
charset=3Diso-8859-1">
<TITLE>Message</TITLE>
<META content=3D"MSHTML 6.00.2800.1141" name=3DGENERATOR></HEAD>
<BODY>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D863152217-09072003>HI!</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D863152217-09072003></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D863152217-09072003>Iam =
trying to=20
program the Bit BLT engine of 69030 with the attached code, but nothing =
is=20
visible on the screen.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D863152217-09072003>When I =
select the=20
bitwise operation as 0xFF(write to BR04) ,the white block is coming =
at=20
desired location and of desired size.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D863152217-09072003>But =
whwn I choose it=20
as 0xCC nothing comes on screen...</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN class=3D863152217-09072003>Can =
any one please=20
help me out of this......</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN =
class=3D863152217-09072003>THANKING U IN=20
ADAVANCE</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2><SPAN=20
class=3D863152217-09072003>regards,</SPAN></FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV align=3Dleft><FONT face=3DVerdana size=3D2>Nitin =
Mahajan</FONT></DIV>
<DIV align=3Dleft><FONT face=3DVerdana size=3D2>
<DIV align=3Dleft><FONT face=3DVerdana=20
size=3D2>mail:ni...@so...</FONT></DIV></FONT></DIV>
<DIV align=3Dleft><FONT face=3DVerdana size=3D2>Ph:51101667. Mobile :=20
9886099925</FONT></DIV>
<DIV align=3Dleft><FONT face=3DVerdana=20
size=3D2>=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D</FONT></DIV>
<DIV align=3Dleft><FONT face=3DVerdana size=3D2>The Lord gave us two =
ends -- one to=20
sit on and the other to think with. Success depends on which one we use =
the=20
most.</FONT></DIV>
<DIV> </DIV></BODY></HTML>
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