v8dave

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Activity overview

Latest activity by v8dave

  • v8dave created a post,

    NHD-7.0-1024600AF-LSXP-CTP timing information required

    1. Community
    2. TFTs

    I have purchased some of the new 7" IPS TFT displays to test with and my interface to them is RGB from the processor and then converted to LVDS at the PCB fitted onto the rear of the LCD. This is t...

    • v8dave
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    • 2 comments
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  • v8dave commented,

    1. Community
    2. TFTs
    3. Image Alignment - 480x272 image on 800x480 TFT

    Thanks, Mike,I am running with a Samsung S5P6818 8 core A53 processor board from FriendlyArm (NanoPC T3 Plus)I'll try lowering the pixel clock too. Right now it is at 30Mhz. I have the drive level ...

  • v8dave commented,

    1. Community
    2. TFTs
    3. Image Alignment - 480x272 image on 800x480 TFT

    I was able to add 22R resistors to the CLK, HSYNC, VSYNC and DEN and reduced the drive current on the RGB lines and now I seem to have a more stable display although I do see some horizontal shift ...

  • v8dave created a post,

    Sunlight readable 1280x800 display with cap touch

    1. Community
    2. TFTs

    It would be great if we could get a sunlight readable display with 1280 x 800 resolution and capacitive touch. I know this would need to be LVDS but that is not an issue with modern processors and ...

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    • 1 follower
    • 1 comment
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  • v8dave commented,

    1. Community
    2. TFTs
    3. Image Alignment - 480x272 image on 800x480 TFT

    Thanks MikeI suspect I have reflection issues as I didn't install any series termination resistors in the lines. I am considering restringing the PCB to add these to the PCB layout but on the proto...

  • v8dave commented,

    1. Community
    2. TFTs
    3. Image Alignment - 480x272 image on 800x480 TFT

    The offset shown in that image was because the datasheet in 2018 for this TFT had the  HBP (Horizontal Back Porch) value as 88 pixel clocks, which through trial and error testing I found out was w...

  • v8dave commented,

    1. Community
    2. TFTs
    3. TFT Display with Beagle Green

    It is a custom 4 layer PCB with ground plane on top and bottom as well as an internal plane connected to ground with via stitching top and bottom and also to the internal plane.It seems better now ...

  • v8dave commented,

    1. Community
    2. TFTs
    3. TFT Display with Beagle Green

    Interesting that you have the hor back porch at 40 when the datasheet shows 88. It works with 40 but I still get tearing.I need to investigate the timing more and try and setup a logic analyser on ...

  • v8dave commented,

    1. Community
    2. TFTs
    3. TFT Display with Beagle Green

    Here is a video of the tearing and the extra dots appearing on the display. The display is rotated for now until I fix the Android build to rotate to landscape.https://youtu.be/NmyMciQCH5II made so...

  • v8dave commented,

    1. Community
    2. TFTs
    3. TFT Display with Beagle Green

    I have the display working with the settings I posted earlier except that there is some tearing on the edges of text and graphics. Very slight but noticable and I am sure it should be rock solid as...