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dpu_1_localdimming

dpu_1_localdimming#

Overview#

This example demonstrates the implementation of the local dimming feature. The backlight control is achieved through local dimming firmware running on the CM0 core.

Supported Boards#

imx952evk
Hardware requirements

  • Micro USB cable

  • IMX952LPD5EVK-19 board

  • J-Link Debug Probe

  • 12V~20V power supply

  • MX9_LVDS_LD panel

  • Personal Computer

Board settings

For MX9_LVDS_LD panel(1920*720), connect MINISAS ports J15 and J16 to panel.

Prepare the Demo

  1. Connect 12V power supply and J-Link Debug Probe to the board, switch SW4 to power on the board.

  2. Connect a micro USB cable between the host PC and the J31 USB port on the cpu board.

  3. Open a serial terminal with the following settings:

    • 115200 baud rate

    • 8 data bits

    • No parity

    • One stop bit

    • No flow control

  4. Download the program to the target board.

  5. Launch the debugger in your IDE to begin running the example.

Steps to configure the panels

Default panel is MX9_LVDS_LD panel, default port is DPU_DI_LVDS, default setting for APP_DISPLAY_EXTERNAL_CONVERTOR is disabled Tips: The APP_DISPLAY_EXTERNAL_CONVERTOR can be set as 1 when you are using MIPI2HDMI card(ADV7535) or LVDS2HDMI card(IT6263) only.

When Kconfig is used

Below setting is for kconfig, the settings in dpu/localdimming/cm7/prj.conf For default MX9_LVDS_LD panel, you do not need to change anything.

When package is used

Below setting is for mcux_config.h. For default MX9_LVDS_LD panel, Setting DEMO_PANEL to 18. You also need to set LDB_DUAL_PANEL to 1.

Running the demo

When the example runs successfully, you can see the rectangles and diamonds shown in the screen.

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