manes6969
Registered: 06/11/09
Posts: 10
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| Posted 17/04/12 at 03:55 AM | Reply with quote #1 |
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Hi
I am trying to program the 4dlcdm-32 module , but I'm getting stuck in filling the screen with e.g. white pixels. I have done the init as described in the document on this website , and that seems to work , because after the init I have a scree full of colored pixels. Then I'm constantly writing to reg 0x22 with 16bit data 0xffff wich should produce a white filled pixel pattern , but not a single pixel changes :-( Any clues what I'm forgetting or doing wrong ?
Kind regards , Ronny
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ESPsupport
Moderator
Registered: 27/01/09
Posts: 4,271
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| Posted 17/04/12 at 07:58 AM | Reply with quote #2 |
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Have you set the 8 addressing registers in start, end order? Have you tried reading one of the readable registers to try and ensure everything is connected properly? |
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manes6969
Registered: 06/11/09
Posts: 10
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| Posted 18/04/12 at 04:56 AM | Reply with quote #3 |
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Hi,
It looks like I found the error ! When writing to reg 0x22 the cs must stay low , and you have to sent data words one after another. I pulsed the cs after the data and restarted the command . This doesn't seem to work. I'm gonna play a bit further with it to find the exact reason , but I'm now able to fill the screen with a certain color.
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manes6969
Registered: 06/11/09
Posts: 10
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| Posted 18/04/12 at 04:57 AM | Reply with quote #4 |
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| <p>Hi,</p><p><br></p><p>It looks like I found the error ! When writing to reg 0x22 the cs must stay low , and you have to sent data words one after another.</p><p>I pulsed the cs after the data and restarted the command . This doesn't seem to work.</p><p>I'm gonna play a bit further with it to find the exact reason , but I'm now able to fill the screen with a certain color.</p><p><br></p> |
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