0.前言

​ 在前面我们已经学习了关于100ASK_V853-PRO编译和烧写,接下来就是在Tina SDK下去适配七寸RGB屏，购买链接为：https://item.taobao.com/item.htm?spm=a1z10.5-c-s.w4002-18944745104.11.669f1b7fE1ptyQ&id=611156659477

100ASK_V853-PRO开发板购买链接：100ASK_V853-PRO开发板

【资料图】

LCD_调试指南:https://tina.100ask.net/SdkModule/Linux_LCD_DevelopmentGuide-01/

Display_开发指南:https://tina.100ask.net/SdkModule/Linux_Display_DevelopmentGuide-01/

​ 如果已经使用我们的增加的补丁文件，默认启动有Tina Linux的logo，同时还支持了lvgl示例和触摸。可在开发板的串口终端上输入lv_examples，可以发现我们提供有5个lvgl示例。输入lv_examples 0，可运行第一个lvgl示例。

root@TinaLinux:/# lv_exampleslv_examples 0, is lv_demo_widgetslv_examples 1, is lv_demo_musiclv_examples 2, is lv_demo_benchmarklv_examples 3, is lv_demo_keypad_encoderlv_examples 4, is lv_demo_stressroot@TinaLinux:/# lv_examples 0wh=1024x600, vwh=1024x1200, bpp=32, rotated=0Turn on double buffering.Turn on 2d hardware acceleration.Turn on 2d hardware acceleration rotate.

运行完成后可在七寸RGB屏上显示LVGL V8的示例界面，同时支持触摸控制示例。

1.适配七寸RGB屏的流程

​ 由于Tina SDK中默认已经支持RGB屏驱动，所以适配七寸RGB屏只注意以下几个点：

​ 1.修改设备树

​ 2.配置内核

​ 3.修改Uboot配置

内核设备树的位置：tina-v853-open/device/config/chips/v853/configs/100ask/board.dts

uboot设备树的位置：tina-v853-open/device/config/chips/v853/configs/100ask/board.dts

修改内核配置：在tina的根目录下执行make kernel_menuconfig

修改uboot配置：进入uboot的根目录tina-v853-open/brandy/brandy-2.0/u-boot-2018下执行make menuconfig

内核驱动位置：tina-v853-open/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/default_panel.c

uboot驱动位置：

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

2.检查修改设备树

在Tina根目录下，输入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 修改内核设备树

修改 board.dts中的lcd0为：

&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节点下增加rgb18_pins_a和rgb18_pins_b子节点，增加引脚复用功能

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设备树

在同一目录下修改uboot设备树

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节点下增加rgb18_pins_a和rgb18_pins_b子节点，增加引脚复用功能

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.检查修改内核配置和uboot配置

3.1 修改内核配置

在Tina的根目录下输入make kernel_menuconfig

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

通过方向键，选择并进入如下目录，输入Y开启DISP Driver Support

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

如下图所示：

选中后，通过方向键选择Save，按下回车。

按下后会提示您是否确认保存备份，选择OK

此时我们所修改的配置将保存在tina-v853-open/kernel/linux-4.9/.config文件中，继续按下回车退出。

保存完成后，通过方向键选择Exit，一直选择Exit，直到退出内核配置界面

3.2 修改uboot配置

想要修改uboot，需要进入tina-v853-open/brandy/brandy-2.0/u-boot-2018目录下，执行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

通过方向键进入

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

如下图所示：

选中后，通过方向键选择Save，按下回车。

按下后会提示您是否确认保存备份，选择OK

此时我们所修改的配置将保存在tina-v853-open/brandy/brandy-2.0/u-boot-2018/.config文件中，继续按下回车退出。

保存完成后，通过方向键选择Exit，一直选择Exit，直到退出uboot配置界面

4.七寸RGB屏驱动程序

内核和uboot中的驱动程序都是同一套，可以复用的。由于我们选中了sunxi-disp2，都会默认去编译default_panel.c驱动程序。

内核驱动位置：tina-v853-open/kernel/linux-4.9/drivers/video/fbdev/sunxi/disp2/disp/lcd/default_panel.c

uboot驱动位置：

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 programis 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:lcd1static 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.开启触摸功能

5.1修改设备树

修改设备树中的twi2节点下增加ctp触摸子节点

&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 = <®_aldo2>;                //ctp_power_ldo= <®_dldo1>;                //ctp_power_ldo_vol = <3300>;        };};

并在lcd0节点后面使能twi2节点和引脚复用功能。

&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 = <®_dcdc1>;        twi_pkt_interval = <0>;        //status = "disabled";        status = "okay";};

5.2 修改内核配置

​ 在Tina的根目录下执行make kernel_menuconfig

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

进入下面的目录输入Y选中gt9xxnew touchscreen driver触摸驱动

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

如下图所示

保存并退出内核配置界面

6.打开lvgl示例程序

在Tina的根目录下，输入make menuconfig

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

进入如下目录，并输入Y选中lv_examples

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

选中后保存并退出配置界面。

7.编译并打包生成镜像

由于我们第一次已经完整编译了系统，现在修改后编译系统的时间就不会特别长，具体时间取决于CPU的性能，在Tina的根目录下执行make -jN ，其中N为线程数，增加线程数提高编译速度。

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

等待编译完成后，输入pack，打包生成镜像

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

打包生成镜像后可以在tina-v853-open/out/v853/100ask/openwrt/目录下找到新的镜像文件

v853_linux_100ask_uart0.img，将该文件拷贝到windows电脑下备用。

8.烧录新镜像启动开发板

使用全志PhoenixSuit烧写工具进行新镜像的烧写，具体方法可以参见《100ASK_V853-PRO 环境配置及编译烧写》。

注意：需要在上电前连接七寸RGB屏，同时连接排线时需要注意排线的线序是否正确。

连接好七寸屏，再连接电源线和两条Type-C数据线，将开关拨向电源接口的方向即可上电启动开发板，在烧写新镜像完成后通过串口工具打开开发板的串口终端，进入Tina Linux的控制台界面，输入lv_examples 0，即可在七寸RGB屏上显示出LVGL的DEMO程序。

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