自制V831小相机适配 i80 LCD 显示屏

[YuzukiTsuru]

V831没有RGB也没有MIPI，正好手上有几片i80 MCU屏幕可以用（320*480 3.5寸的，15块钱一片）

电路部分

屏幕部分：

主控部分：

没啥好说的，照着Sipeed的抄就行了

配置设备树

lcd0: lcd0@01c0c000 {
			lcd_used            = <1>;

			lcd_driver_name     = "ili9481";

			lcd_x               = <320>;
			lcd_y               = <480>;
			lcd_width           = <108>;
			lcd_height          = <64>;
			lcd_dclk_freq       = <5>;

			lcd_pwm_used        = <0>;

			lcd_hbp             = <20>;
			lcd_ht              = <382>;
			lcd_hspw            = <2>;
			lcd_vbp             = <2>; // 320
			lcd_vt              = <486>; // 320
			lcd_vspw            = <2>;

			lcd_if              = <1>;
			lcd_frm             = <2>;
			lcd_cpu_mode        = <1>;
			lcd_cpu_te          = <0>;
			lcd_cpu_if	        = <14>;

			lcd_io_phase        = <0x0000>;
			lcdgamma4iep        = <22>;
			lcd_gamma_en        = <0>;
			lcd_cmap_en         = <0>;
			lcd_bright_curve_en = <0>;
			lcd_rb_swap         = <0>;

			lcd_gpio_0 = <&pio PH 5 1 0 3 0>; /* rst */
			lcd_gpio_1 = <&pio PD 21 1 0 3 0>; /* cs */
			lcd_bl_en = <&pio PH 6 1 0 3 1>;

			pinctrl-0 = <&rgb8_pins_a>;
			pinctrl-1 = <&rgb8_pins_b>;
		};

因为这里用的是Kernel刷屏，所以就不配uboot的了

驱动

然后找大佬鼠嫖驱动，放到 lichee/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/文件夹下。

编辑 lichee/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/panels.c，找一个顺眼的地方加一下配置。

#ifdef CONFIG_LCD_SUPPORT_ILI9481
	&ili9481_panel,
#endif

编辑lichee/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/panels.h，找一个顺眼的地方加一下配置。

#ifdef CONFIG_LCD_SUPPORT_ILI9481
extern struct __lcd_panel ili9481_panel;
#endif

编辑lichee/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/Kconfig，找一个顺眼的地方加一下配置。

config LCD_SUPPORT_ILI9481
	bool "LCD support ili9481 panel"
	default n
	---help---
		If you want to support ili9481 panel for display driver, select it.

编辑 lichee/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/Makefile，找一个顺眼的地方加一下配置。

disp-$(CONFIG_LCD_SUPPORT_ILI9481) += lcd/ili9481.o

再打开 m kernel_menuconfig

Device Drivers  --->
	Graphics support  ---> 
		Frame buffer Devices  --->
			Video support for sunxi  --->
				LCD panels select  --->
					 [*] LCD support ili9481 panel        

保存，编译kernel打包就好了。

启动系统

刷卡，启动系统，可以看到屏幕背光已经亮了。

测试一下

echo 1 > sys/class/disp/disp/attr/colorbar

驱动和配置已经上传Github，自取

[whycan]

跟着楼主认真学习！