LCD-TFT(Liquid Crystal Display - Thin Film Transistor)显示控制器外设(LTDC)用于为各种并行数字RGB LCD和TFT显示面板提供接口。
LTDC生成并行数字RGB信号和相关的控制信号(水平和垂直同步,像素时钟和数据使能)。此外,LTDC连接到DSI内部外围设备,该外围设备提供了与MIPI®DSI兼容显示面板进行通信的接口。
特性:

  • 提供最大24bit的并行RGB信号

  • 最大分辨率WXGA(1366x768) @60fps

  • 2个带有专用FIFO的显示层

 

LTDC外设的信号

LCD-TFT signalsI/ODescription
LCD_CLKOClock output
LCD_HSYNCOHorizontal synchronization
LCD_VSYNCOVertical synchronization
LCD_DEONot data enable
LCD_R[7:0]OData: 8-bit red data
LCD_G[7:0]OData: 8-bit green data
LCD_B[7:0]OData: 8-bit blue data

 

DomainPeripheralRuntime allocationComment   
InstanceCortex-A7
secure
(OP-TEE)
Cortex-A7
non-secure
(Linux)
Cortex-M4
(STM32Cube)
   
VisualLTDCLTDC

LTDC配置为RGB-TFT液晶

/{
		panel_rgb: panel-rgb {
		compatible = "innolux,at070tn92";
		//compatible = "innolux,zj070na-01p";
		//compatible = "innolux,at043tn24";
		pinctrl-names = "default", "sleep";
		pinctrl-0 = <ltdc_pins_b>;
		pinctrl-1 = <ltdc_pins_sleep_b>;
		backlight = <&panel_backlight>;
		status = "okay";

		port {
				panel_in_rgb: endpoint {
						remote-endpoint = <<dc_out_rgb>;
				};
		};
};

&ltdc {
		status = "okay";
		port {
				#address-cells = <1>;
				#size-cells = <0>;

				ltdc_ep0_out: endpoint@0 {
						reg = <0>;
						remote-endpoint = <&sii9022_in>;
				};
		};
};
作者:SteveChen  创建时间:2024-09-18 14:47
最后编辑:SteveChen  更新时间:2024-09-18 14:48
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