Device Tree 設定

Device Tree - ccap0

/dev/video0 是 CCAP

/dev/video1 是 VC8000

/dev/video2 是 webcam

要用 HM1055 ，記得打開 device tree 的 ccap0 和 i2c3

&ccap0 {
        status = "okay";
	port {
		/* Parallel bus endpoint */
		ccap0_1: endpoint {
			remote-endpoint = <&hm1055_0>;
			hsync-active = <0>;     /* Active low */
			vsync-active = <0>;     /* Active low */
			pclk-sample = <1>;      /* Rising */
		};
	};
};

&i2c3 {
	status = "okay";
	pinctrl-names = "default";
	pinctrl-0 = <&pinctrl_i2c3>;
	hm1055@24 {
		compatible = "himax,hm1055";
		reg = <0x24>;
		pinctrl-names = "default";
		pinctrl-0 = <&pinctrl_ccap0>;
		clocks = <&clk CCAP0_GATE>;
		clock-names = "xclk";
		reset-gpios = <&gpiom 1 GPIO_ACTIVE_LOW>; /* PM1 */
		powerdown-gpios = <&gpiok 8 GPIO_ACTIVE_HIGH>; /* PK8 */
		port {
			hm1055_0: endpoint {
				remote-endpoint = <&ccap0_1>;
			};
		};
	};
};

...

	ccap0 {
		pinctrl_ccap0: ccap0grp{
			nuvoton,pins =
				<SYS_GPK_MFPH_PK9MFP_CCAP0_SCLK		&pcfg_default>,
				<SYS_GPK_MFPH_PK10MFP_CCAP0_PIXCLK	&pcfg_default>,
				<SYS_GPK_MFPH_PK11MFP_CCAP0_HSYNC	&pcfg_default>,
				<SYS_GPM_MFPL_PM0MFP_CCAP0_VSYNC	&pcfg_default>,
				<SYS_GPM_MFPL_PM2MFP_CCAP0_DATA0	&pcfg_default>,
				<SYS_GPM_MFPL_PM3MFP_CCAP0_DATA1	&pcfg_default>,
				<SYS_GPM_MFPL_PM4MFP_CCAP0_DATA2	&pcfg_default>,
				<SYS_GPM_MFPL_PM5MFP_CCAP0_DATA3	&pcfg_default>,
				<SYS_GPM_MFPL_PM6MFP_CCAP0_DATA4	&pcfg_default>,
				<SYS_GPM_MFPL_PM7MFP_CCAP0_DATA5	&pcfg_default>,
				<SYS_GPM_MFPH_PM8MFP_CCAP0_DATA6	&pcfg_default>,
				<SYS_GPM_MFPH_PM9MFP_CCAP0_DATA7	&pcfg_default>;
		};
	};
    ...
	i2c3 {
		pinctrl_i2c3: i2c3grp{
			nuvoton,pins =
				<SYS_GPM_MFPH_PM14MFP_I2C3_SDA	&pcfg_default>,
				<SYS_GPM_MFPH_PM15MFP_I2C3_SCL	&pcfg_default>;
		};
	};
    ...

Device Tree - display

Path : ma35d1.dtsi

雖然 ma35d1.dtsi 的 display 是 status = “disabled”; 但是 ma35d1-som-256m.dts 會繼承 ma35d1.dtsi 的參數並讓 status = “okay”;

注意以下 RGB interface 可以調整

新唐的 Driver 都是 2byte 2byte 往 LCD 送，所以 bits-per-pixel 是 32bits ， 雖然是RGB888 3byte，但是送出去是 4 byte

	display: display@40260000 {
		compatible = "nuvoton,ma35d1-fb";
		reg = <0x0 0x40260000 0x0 0x2000>;
		interrupts = <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>;
		nuvoton,clk = <&clk>;
		clocks = <&clk DCU_GATE>, <&clk DCUP_DIV>;
		clock-names = "dcu_gate", "dcup_div";
		resets = <&reset MA35D1_RESET_DISP>;
		//pwr-gpios = <&gpiok 5 GPIO_ACTIVE_HIGH>; //LVDS pwr-enable pin
		status = "disabled";

		reset_offset_en = "no";

		//RGB interface
		bits-per-pixel = <32>;
		pixel-fmt = <6>; //4:RGB565 6:RGB888 8:UYVY 17:NV12
		swizzle = <0>;//0:ARGB, 1:RGBA, 2:ABGR, 3:BGRA
		dpi-config = <5>;//0:D16CFG1, 1:D16CFG2, 2:D16CFG3, 3:D18CFG1, 4:D18CFG2, 5:D24

		buffer-num = <3>;
		colorkey-en = <1>;

		//Enable overlay function
		overlay-en = <0>;
		overlay-pixel-fmt = <6>;
		overlay-width = <1024>;
		overlay-height = <600>;
		overlay-rect-tlx = <0>;
		overlay-rect-tly = <0>;

		display-timings {
			native-mode = <&timing0>;
        ...

QT 範例

GStreamer 範例

yocto 版本 ，RD 在 /usr/bin 下 有放capture 腳本，可以 streaming 也可以截圖。

以下為例 用 gst-launch-1.0 。

root@numaker-som-ma35d16a81:/usr/bin# cat capture.sh
#gst-launch-1.0 v4l2src num-buffers=1 device=/dev/video0 ! jpegenc ! filesink location=$1
gst-launch-1.0 v4l2src device=/dev/video0 ! videoscale ! 'video/x-raw,width=640,height=480,framerate=15/1' ! videoconvert ! fbdevsink device=/dev/fb0 sync=false

執行方式 :

root@numaker-som-ma35d16a81:~# capture.sh root@numaker-som-ma35d16a81:~# capture.sh
[ 3549.350833] usb 2-1: reset high-speed USB device number 2 using ma35d1-ehci
Setting pipeline to PAUSED ...
Pipeline is live and does not need PREROLL ...
Setting pipeline to PLAYING ...
New clock: GstSystemClock
[ 3560.063053] usb 2-1: USB disconnect, device number 2