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Original question:

DS90UB947-Q1: How to generate patterns used 947 internal clock and internal timing

DS90UB947-Q1：974内部clock生成pattern

? ??
Prodigy 40 points
Part Number: DS90UB947-Q1
Other Parts Discussed in Thread: ALP

Tool/software:

当使用内部时序和内部时钟生成 pattern 时，如果我将输出设置为红色，为什么输出红色后屏幕颜色突然变黑，然后切换到其他颜色没有任何响应

  • 0
    TI__Genius 16100 points

    Hi user,

    1. What is your hardware setup(deserializer?) and panel resolution?

    2. Did you use ALP? https://www.ti.com/tool/ALP We recommend use ALP patgen tab to achieve the patgen function first. 

    Currently, you can use patgen to output the red, but black screen afterward. It seems to be the PCLK may be mismatch to you panel. Do you have scrip setting or any further information that we can help you.


    Regards,

    Roy

  • 0 in reply to Roy Chou1
    Prodigy 40 points

    Hi  Roy  morning
    code as follows
    # 947_address:0X10
    # 948_address:0X2C
    #clock frequency:88.2MHZ
    #hactive = <1920>; vactive = <720>; hback-porch = 16;  vback-porch = 10; hsync-len = 40;vsync-len = 6;


    i2cset -y -f 3 0x10 0x03 0xDA
    i2cset -y -f 3 0x10 0x17 0x9E
    i2cset -y -f 3 0x10 0x4F 0x80
    i2cset -y -f 3 0x2C 0x26 0x16
    i2cset -y -f 3 0x2C 0x27 0x16
    i2cset -y -f 3 0x10 0x64 0x10
    i2cset -y -f 3 0x10 0X66 0X07
    i2cset -y -f 3 0x10 0X67 0X80
    i2cset -y -f 3 0x10 0X66 0X08
    i2cset -y -f 3 0x10 0X67 0X07
    i2cset -y -f 3 0x10 0X66 0X09
    i2cset -y -f 3 0x10 0X67 0X2D
    i2cset -y -f 3 0x10 0X66 0X04
    i2cset -y -f 3 0x10 0X67 0X98
    i2cset -y -f 3 0x10 0X66 0X05
    i2cset -y -f 3 0x10 0X67 0X58
    i2cset -y -f 3 0x10 0X66 0X06
    i2cset -y -f 3 0x10 0X67 0X46
    i2cset -y -f 3 0x10 0X66 0X0C
    i2cset -y -f 3 0x10 0X67 0X10
    i2cset -y -f 3 0x10 0X66 0x0D
    i2cset -y -f 3 0x10 0X67 0x0A
    i2cset -y -f 3 0x10 0X66 0x0A
    i2cset -y -f 3 0x10 0X67 0x28
    i2cset -y -f 3 0x10 0X66 0x0B
    i2cset -y -f 3 0x10 0X67 0x06
    i2cset -y -f 3 0x10 0X66 0x1a
    i2cset -y -f 3 0x10 0X67 0x06
    i2cset -y -f 3 0x10 0X66 0x03
    i2cset -y -f 3 0x10 0X67 0x53
    i2cset -y -f 3 0x10 0X65 0x04
    i2cset -y -f 3 0x10 0X64 0x41
     Let's say I set the internal timings, and the internal clock outputs red, and the screen colour does turn red, but then the colour fades out.

  • 0 in reply to ? ??
    TI__Genius 16100 points

    Hi user,

    What is your sync polarity and front porch(total is also ok)? I will give you the sample code for the timing. Or you can follow the app note to build it.

    https://www.ti.com/lit/an/snla132g/snla132g.pdf?ts=1732199489853&ref_url=https%253A%252F%252Fwww.google.com%252F

    From the command that you provided, the last command is 0x41. it should be green color. So I think the red is not from 947patgen. 

    Regards,

    Roy