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ksadowski
3 Posts |
 Posted - 23 Oct 2007 : 12:53:34
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I'm in the process of porting code from GC+ to GCX. The code is ported and operational, unfortunately, I find some of the bitmaps don't display correctly. The bitmaps have pink pixels in place of some of the gradients. I've displayed the image test patterns (topic.asp?TOPIC_ID=389) and they seem to display correctly except for a pink line in the grayscale gradient in color_bar_test_pattern.bmp.
I then put a bitmap with two vertical gray bars (0x848284 on the left and 0x7b7d7b on the right). When displayed on the GCX screen I get a pink line where the two gray colors meet. I've swapped displays and cables, but the pink line stays. I've also tried jpeg's and gif files, tried 8 and 16 bit display, all with the same result.
I used Remote Zoomin to view the image buffer, but that appears correct.
Has anyone else seen this problem?
Board: GCX
OS: WinCE 5.00.10 GCX_Core
Screen: LQ4D343
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jjoseph
47 Posts |
Posted - 23 Oct 2007 : 15:30:48
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Thank you for your message.
A slight tweaking of the settings in your adsload.hwt file should address this problem.
In place of the lines:
;0x4400000C 0x04300001 ;LCCR3, 16BPP
0x4400000C 0x03300001 ;LCCR3, 8 BPP
Insert the lines:
;0x4400000C 0x04700001 ;LCCR3, 16BPP
0x4400000C 0x03700001 ;LCCR3, 8 BPP
Boot with the updated adsload.hwt file on your CF card and check the bmp file again. |
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ksadowski
3 Posts |
Posted - 24 Oct 2007 : 10:30:13
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That worked great!
What did that change do anyway? Are those registers documented somewhere?
Thanks for your help. |
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jjoseph
47 Posts |
Posted - 24 Oct 2007 : 12:15:59
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The registers are defined in chapter 7 of the Intel PXA255 Developer's manual.
The change was to update which pixel clock edge to use. I'm afraid the details are somewhat more involved than could be discussed here. |
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