0.前言

? 在前面我們已經學習了關于100ASK_V853-PRO編譯和燒寫,接下來就是在Tina SDK下去適配七寸RGB屏，購買鏈接為：https://item.taobao.com/item.htm?spm=a1z10.5-c-s.w4002-18944745104.11.669f1b7fE1ptyQ&id=611156659477

100ASK_V853-PRO開發板購買鏈接：100ASK_V853-PRO開發板

LCD_調試指南:https://tina.100ask.net/SdkModule/Linux_LCD_DevelopmentGuide-01/

Display_開發指南:https://tina.100ask.net/SdkModule/Linux_Display_DevelopmentGuide-01/

? 如果已經使用我們的增加的補丁文件，默認啟動有Tina Linux的logo，同時還支持了lvgl示例和觸摸。可在開發板的串口終端上輸入lv_examples，可以發現我們提供有5個lvgl示例。輸入lv_examples 0，可運行第一個lvgl示例。

root@TinaLinux:/# lv_examples
lv_examples 0, is lv_demo_widgets
lv_examples 1, is lv_demo_music
lv_examples 2, is lv_demo_benchmark
lv_examples 3, is lv_demo_keypad_encoder
lv_examples 4, is lv_demo_stress
root@TinaLinux:/# lv_examples 0
wh=1024x600, vwh=1024x1200, bpp=32, rotated=0
Turn on double buffering.
Turn on 2d hardware acceleration.
Turn on 2d hardware acceleration rotate.

運行完成后可在七寸RGB屏上顯示LVGL V8的示例界面，同時支持觸摸控制示例。

1.適配七寸RGB屏的流程

? 由于Tina SDK中默認已經支持RGB屏驅動，所以適配七寸RGB屏只注意以下幾個點：

? 1.修改設備樹

? 2.配置內核

? 3.修改Uboot配置

內核設備樹的位置：tina-v853-open/device/config/chips/v853/configs/100ask/board.dts

uboot設備樹的位置：tina-v853-open/device/config/chips/v853/configs/100ask/board.dts

修改內核配置：在tina的根目錄下執行make kernel_menuconfig

修改uboot配置：進入uboot的根目錄tina-v853-open/brandy/brandy-2.0/u-boot-2018下執行make menuconfig

內核驅動位置：tina-v853-open/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/default_panel.c

uboot驅動位置：

tina-v853-open/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/default_panel.c

2.檢查修改設備樹

在Tina根目錄下，輸入cd device/config/chips/v853/configs/100ask/

book@100ask:~/workspaces/tina-v853-open$ cd device/config/chips/v853/configs/100ask/
book@100ask:~/workspaces/tina-v853-open/device/config/chips/v853/configs/100ask$ vi board.dts

2.1 修改內核設備樹

修改 board.dts中的lcd0為：

&lcd0 {
        /* part 1 */
        lcd_used            = <1>;
        lcd_driver_name     = "default_lcd";
        lcd_backlight       = <100>;

        /* part 2 */
        lcd_if = <0>;
        lcd_hv_if = <0>;

        /* part 3 */
        lcd_x               = <1024>;
        lcd_y               = <600>;
        lcd_width           = <154>;
        lcd_height          = <85>;
        lcd_dclk_freq       = <51>;
        lcd_hbp             = <140>;
        lcd_ht              = <1344>;
        lcd_hspw            = <20>;
        lcd_vbp             = <20>;
        lcd_vt              = <635>;
        lcd_vspw            = <3>;

        lcd_pwm_used        = <1>;
        lcd_pwm_ch          = <9>;
        lcd_pwm_freq        = <500>;
        lcd_pwm_pol         = <1>;

        /* part 5 */
        lcd_frm = <1>;
        lcd_io_phase = <0x0000>;
        lcd_gamma_en = <0>;
        lcd_cmap_en = <0>;
        lcd_hv_clk_phase = <0>;
        lcd_hv_sync_polarity= <0>;

        /* part 6 */
        lcd_power = "vcc-lcd";
        lcd_pin_power = "vcc-pd";
        pinctrl-0 = <&rgb18_pins_a>;
        pinctrl-1 = <&rgb18_pins_b>;
};

在&pio節點下增加rgb18_pins_a和rgb18_pins_b子節點，增加引腳復用功能

 rgb18_pins_a: rgb18@0 {
                allwinner,pins = "PD0", "PD1", "PD2", "PD3", "PD4", "PD5", 
                        "PD6", "PD7", "PD8", "PD9", "PD10", "PD11", 
                        "PD12", "PD13", "PD14", "PD15", "PD16", "PD17", 
                        "PD18", "PD19", "PD20", "PD21";
                allwinner,pname = "lcdd2", "lcdd3", "lcdd4", "lcdd5", "lcdd6", "lcdd7", 
                        "lcdd10", "lcdd11", "lcdd12", "lcdd13", "lcdd14", "lcdd15", 
                        "lcdd18", "lcdd19", "lcdd20", "lcdd21", "lcdd22", "lcdd23", 
                        "lcdpclk", "lcdde", "lcdhsync", "lcdvsync";
                allwinner,function = "lcd";
                allwinner,muxsel = <2>;
                allwinner,drive = <3>;
                allwinner,pull = <0>;
        };

        rgb18_pins_b: rgb18@1 {
                        allwinner,pins = "PD0", "PD1", "PD2", "PD3", "PD4", "PD5", 
                                        "PD6", "PD7", "PD8", "PD9", "PD10", "PD11", 
                                        "PD12", "PD13", "PD14", "PD15", "PD16", "PD17", 
                                        "PD18", "PD19", "PD20", "PD21";
                        allwinner,pname = "lcdd2", "lcdd3", "lcdd4", "lcdd5", "lcdd6", "lcdd7", 
                                        "lcdd10", "lcdd11", "lcdd12", "lcdd13", "lcdd14", "lcdd15", 
                                        "lcdd18", "lcdd19", "lcdd20", "lcdd21", "lcdd22", "lcdd23", 
                                        "lcdpclk", "lcdde", "lcdhsync", "lcdvsync";
                        allwinner,function = "io_disabled";
                        allwinner,muxsel = <0xf>;
                        allwinner,drive = <3>;
                        allwinner,pull = <0>;
        };

2.2 修改uboot設備樹

在同一目錄下修改uboot設備樹

book@100ask:~/workspaces/tina-v853-open/device/config/chips/v853/configs/100ask$ vi uboot-board.dts

&lcd0 {
        lcd_used            = <1>;
        lcd_driver_name     = "default_lcd";
        lcd_backlight       = <100>;

        lcd_if = <0>;
        lcd_hv_if = <0>;

        lcd_x               = <1024>;
        lcd_y               = <600>;
        lcd_width           = <154>;
        lcd_height          = <85>;
        lcd_dclk_freq       = <51>;
        lcd_hbp             = <140>;
        lcd_ht              = <1344>;
        lcd_hspw            = <20>;
        lcd_vbp             = <20>;
        lcd_vt              = <635>;
        lcd_vspw            = <3>;

        lcd_pwm_used        = <1>;
        lcd_pwm_ch          = <9>;
        lcd_pwm_freq        = <500>;
        lcd_pwm_pol         = <1>;

        lcd_frm = <1>;
        lcd_io_phase = <0x0000>;
        lcd_gamma_en = <0>;
        lcd_cmap_en = <0>;
        lcd_hv_clk_phase = <0>;
        lcd_hv_sync_polarity= <0>;

        lcd_power = "vcc-lcd";
        lcd_pin_power = "vcc-pd";
        pinctrl-0 = <&rgb18_pins_a>;
        pinctrl-1 = <&rgb18_pins_b>;
};

在&pio節點下增加rgb18_pins_a和rgb18_pins_b子節點，增加引腳復用功能

rgb18_pins_a: rgb18@0 {
                allwinner,pins = "PD0", "PD1", "PD2", "PD3", "PD4", "PD5", 
                        "PD6", "PD7", "PD8", "PD9", "PD10", "PD11", 
                        "PD12", "PD13", "PD14", "PD15", "PD16", "PD17", 
                        "PD18", "PD19", "PD20", "PD21";
                allwinner,pname = "lcdd2", "lcdd3", "lcdd4", "lcdd5", "lcdd6", "lcdd7", 
                        "lcdd10", "lcdd11", "lcdd12", "lcdd13", "lcdd14", "lcdd15", 
                        "lcdd18", "lcdd19", "lcdd20", "lcdd21", "lcdd22", "lcdd23", 
                        "lcdpclk", "lcdde", "lcdhsync", "lcdvsync";
                allwinner,function = "lcd";
                allwinner,muxsel = <2>;
                allwinner,drive = <3>;
                allwinner,pull = <0>;
        };
        rgb18_pins_b: rgb18@1 {
                        allwinner,pins = "PD0", "PD1", "PD2", "PD3", "PD4", "PD5", 
                                        "PD6", "PD7", "PD8", "PD9", "PD10", "PD11", 
                                        "PD12", "PD13", "PD14", "PD15", "PD16", "PD17", 
                                        "PD18", "PD19", "PD20", "PD21";
                        allwinner,pname = "lcdd2", "lcdd3", "lcdd4", "lcdd5", "lcdd6", "lcdd7", 
                                        "lcdd10", "lcdd11", "lcdd12", "lcdd13", "lcdd14", "lcdd15", 
                                        "lcdd18", "lcdd19", "lcdd20", "lcdd21", "lcdd22", "lcdd23", 
                                        "lcdpclk", "lcdde", "lcdhsync", "lcdvsync";
                        allwinner,function = "io_disabled";
                        allwinner,muxsel = <0xf>;
                        allwinner,drive = <3>;
                        allwinner,pull = <0>;
        };

3.檢查修改內核配置和uboot配置

3.1 修改內核配置

在Tina的根目錄下輸入make kernel_menuconfig

book@100ask:~/workspaces/tina-v853-open$ make kernel_menuconfig

通過方向鍵，選擇并進入如下目錄，輸入Y開啟DISP Driver Support

 → Device Drivers 
 	→ Graphics support 
 		→ Frame buffer Devices 
 			→ Video support for sunxi
 				<*> DISP Driver Support(sunxi-disp2)

如下圖所示：

選中后，通過方向鍵選擇Save，按下回車。

按下后會提示您是否確認保存備份，選擇OK

此時我們所修改的配置將保存在tina-v853-open/kernel/linux-4.9/.config文件中，繼續按下回車退出。

保存完成后，通過方向鍵選擇Exit，一直選擇Exit，直到退出內核配置界面

3.2 修改uboot配置

想要修改uboot，需要進入tina-v853-open/brandy/brandy-2.0/u-boot-2018目錄下，執行make menuconfig

book@100ask:~/workspaces/tina-v853-open$ cd brandy/brandy-2.0/u-boot-2018/
book@100ask:~/workspaces/tina-v853-open/brandy/brandy-2.0/u-boot-2018$ make menuconfig

通過方向鍵進入

→ Device Drivers 
	→ Graphics support 
		 [*] DISP Driver Support(sunxi-disp2)  --->

如下圖所示：

選中后，通過方向鍵選擇Save，按下回車。

按下后會提示您是否確認保存備份，選擇OK

此時我們所修改的配置將保存在tina-v853-open/brandy/brandy-2.0/u-boot-2018/.config文件中，繼續按下回車退出。

保存完成后，通過方向鍵選擇Exit，一直選擇Exit，直到退出uboot配置界面

4.七寸RGB屏驅動程序

內核和uboot中的驅動程序都是同一套，可以復用的。由于我們選中了sunxi-disp2，都會默認去編譯default_panel.c驅動程序。

內核驅動位置：tina-v853-open/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/default_panel.c

uboot驅動位置：

tina-v853-open/brandy/brandy-2.0/u-boot-2018/drivers/video/sunxi/disp2/disp/lcd/default_panel.c

/*
 * drivers/video/sunxi/disp2/disp/lcd/default_panel.c
 *
 * Copyright (c) 2007-2019 Allwinnertech Co., Ltd.
 * Author: zhengxiaobin 
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */
#include "default_panel.h"

static void LCD_power_on(u32 sel);
static void LCD_power_off(u32 sel);
static void LCD_bl_open(u32 sel);
static void LCD_bl_close(u32 sel);

static void LCD_panel_init(u32 sel);
static void LCD_panel_exit(u32 sel);

static void LCD_cfg_panel_info(panel_extend_para * info)
{
        u32 i = 0, j=0;
        u32 items;
        u8 lcd_gamma_tbl[][2] =
        {
                //{input value, corrected value}
                {0, 0},
                {15, 15},
                {30, 30},
                {45, 45},
                {60, 60},
                {75, 75},
                {90, 90},
                {105, 105},
                {120, 120},
                {135, 135},
                {150, 150},
                {165, 165},
                {180, 180},
                {195, 195},
                {210, 210},
                {225, 225},
                {240, 240},
                {255, 255},
        };

        u32 lcd_cmap_tbl[2][3][4] = {
        {
                {LCD_CMAP_G0,LCD_CMAP_B1,LCD_CMAP_G2,LCD_CMAP_B3},
                {LCD_CMAP_B0,LCD_CMAP_R1,LCD_CMAP_B2,LCD_CMAP_R3},
                {LCD_CMAP_R0,LCD_CMAP_G1,LCD_CMAP_R2,LCD_CMAP_G3},
                },
                {
                {LCD_CMAP_B3,LCD_CMAP_G2,LCD_CMAP_B1,LCD_CMAP_G0},
                {LCD_CMAP_R3,LCD_CMAP_B2,LCD_CMAP_R1,LCD_CMAP_B0},
                {LCD_CMAP_G3,LCD_CMAP_R2,LCD_CMAP_G1,LCD_CMAP_R0},
                },
        };

        items = sizeof(lcd_gamma_tbl)/2;
        for (i=0; ilcd_gamma_tbl[lcd_gamma_tbl[i][0] + j] = (value<<16) + (value<<8) + value;
                }
        }
        info->lcd_gamma_tbl[255] = (lcd_gamma_tbl[items-1][1]<<16) + (lcd_gamma_tbl[items-1][1]<<8) + lcd_gamma_tbl[items-1][1];

        memcpy(info->lcd_cmap_tbl, lcd_cmap_tbl, sizeof(lcd_cmap_tbl));

}

static s32 LCD_open_flow(u32 sel)
{
        LCD_OPEN_FUNC(sel, LCD_power_on, 30);   //open lcd power, and delay 50ms
        LCD_OPEN_FUNC(sel, LCD_panel_init, 50);   //open lcd power, than delay 200ms
        LCD_OPEN_FUNC(sel, sunxi_lcd_tcon_enable, 100);     //open lcd controller, and delay 100ms
        LCD_OPEN_FUNC(sel, LCD_bl_open, 0);     //open lcd backlight, and delay 0ms

        return 0;
}

static s32 LCD_close_flow(u32 sel)
{
        LCD_CLOSE_FUNC(sel, LCD_bl_close, 0);       //close lcd backlight, and delay 0ms
        LCD_CLOSE_FUNC(sel, sunxi_lcd_tcon_disable, 0);         //close lcd controller, and delay 0ms
        LCD_CLOSE_FUNC(sel, LCD_panel_exit,     200);   //open lcd power, than delay 200ms
        LCD_CLOSE_FUNC(sel, LCD_power_off, 500);   //close lcd power, and delay 500ms

        return 0;
}

static void LCD_power_on(u32 sel)
{
        sunxi_lcd_power_enable(sel, 0);//config lcd_power pin to open lcd power0
        sunxi_lcd_pin_cfg(sel, 1);
}

static void LCD_power_off(u32 sel)
{
        sunxi_lcd_pin_cfg(sel, 0);
        sunxi_lcd_power_disable(sel, 0);//config lcd_power pin to close lcd power0
}

static void LCD_bl_open(u32 sel)
{
        sunxi_lcd_pwm_enable(sel);
        sunxi_lcd_backlight_enable(sel);//config lcd_bl_en pin to open lcd backlight
}

static void LCD_bl_close(u32 sel)
{
        sunxi_lcd_backlight_disable(sel);//config lcd_bl_en pin to close lcd backlight
        sunxi_lcd_pwm_disable(sel);
}

static void LCD_panel_init(u32 sel)
{
        return;
}

static void LCD_panel_exit(u32 sel)
{
        return ;
}

//sel: 0:lcd0; 1:lcd1
static s32 LCD_user_defined_func(u32 sel, u32 para1, u32 para2, u32 para3)
{
        return 0;
}

__lcd_panel_t default_panel = {
        /* panel driver name, must mach the name of lcd_drv_name in sys_config.fex */
        .name = "default_lcd",
        .func = {
                .cfg_panel_info = LCD_cfg_panel_info,
                .cfg_open_flow = LCD_open_flow,
                .cfg_close_flow = LCD_close_flow,
                .lcd_user_defined_func = LCD_user_defined_func,
        },
};
;>@allwinnertech.com>

5.開啟觸摸功能

5.1修改設備樹

修改設備樹中的twi2節點下增加ctp觸摸子節點

&twi2 {
        ctp@14 {
                compatible = "allwinner,gsl3680";
                device_type = "ctp";
                reg = <0x14>;
                status = "okay";
                ctp_name = "gt9xxnew_ts";
                ctp_twi_id = <0x2>;
                ctp_twi_addr = <0x14>;
                ctp_screen_max_x = <0x400>;
                ctp_screen_max_y = <0x258>;
                ctp_revert_x_flag = <0x0>;
                ctp_revert_y_flag = <0x0>;
                ctp_exchange_x_y_flag = <0x0>;
                ctp_int_port = <&pio PH 7 6 1 3 0xffffffff>;
                ctp_wakeup   = <&pio PH 8 1 1 3 0xffffffff>;
                //ctp-supply = ;
                //ctp_power_ldo = ;
                //ctp_power_ldo_vol = <3300>;
        };

};

并在lcd0節點后面使能twi2節點和引腳復用功能。

&twi2 {
        clock-frequency = <400000>;
        pinctrl-0 = <&twi2_pins_a>;
        pinctrl-1 = <&twi2_pins_b>;
        pinctrl-names = "default", "sleep";
        /* For stability and backwards compatibility, we recommend setting ‘twi_drv_used’ to 0  */
        twi_drv_used = <0>;
        twi-supply = ;
        twi_pkt_interval = <0>;
        //status = "disabled";
        status = "okay";
};

5.2 修改內核配置

? 在Tina的根目錄下執行make kernel_menuconfig

book@100ask:~/workspaces/tina-v853-open$ make kernel_menuconfig

進入下面的目錄輸入Y選中gt9xxnew touchscreen driver觸摸驅動

→ Device Drivers 
	→ Input device support 
		→ Touchscreens 
			<*>   gt9xxnew touchscreen driver

如下圖所示

保存并退出內核配置界面

6.打開lvgl示例程序

在Tina的根目錄下，輸入make menuconfig

book@100ask:~/workspaces/tina-v853-open$ make menuconfig

進入如下目錄，并輸入Y選中lv_examples

 > Gui 
 	> Littlevgl
 		 <*> lv_examples................................. lvgl examples use lvgl-8.1.0 

選中后保存并退出配置界面。

7.編譯并打包生成鏡像

由于我們第一次已經完整編譯了系統，現在修改后編譯系統的時間就不會特別長，具體時間取決于CPU的性能，在Tina的根目錄下執行make -jN ，其中N為線程數，增加線程數提高編譯速度。

book@100ask:~/workspaces/tina-v853-open$ make -j4

等待編譯完成后，輸入pack，打包生成鏡像

book@100ask:~/workspaces/tina-v853-open$ pack

打包生成鏡像后可以在tina-v853-open/out/v853/100ask/openwrt/目錄下找到新的鏡像文件

v853_linux_100ask_uart0.img，將該文件拷貝到windows電腦下備用。

8.燒錄新鏡像啟動開發板

使用全志PhoenixSuit燒寫工具進行新鏡像的燒寫，具體方法可以參見《100ASK_V853-PRO 環境配置及編譯燒寫》。

注意：需要在上電前連接七寸RGB屏，同時連接排線時需要注意排線的線序是否正確。

連接好七寸屏，再連接電源線和兩條Type-C數據線，將開關撥向電源接口的方向即可上電啟動開發板，在燒寫新鏡像完成后通過串口工具打開開發板的串口終端，進入Tina Linux的控制臺界面，輸入lv_examples 0，即可在七寸RGB屏上顯示出LVGL的DEMO程序。

root@TinaLinux:/# lv_examples 0
wh=1024x600, vwh=1024x1200, bpp=32, rotated=0
Turn on double buffering.
Turn on 2d hardware acceleration.
Turn on 2d hardware acceleration rotate.