100ASK_V853-PRO开发板支持七寸RGB屏
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
LCD_调试指南:概述与介绍 - 全志Linux Tina-SDK开发完全手册
Display_开发指南:概述与介绍 - 全志Linux Tina-SDK开发完全手册
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_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.
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 = <5000>;
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 <zhengxiaobin@allwinnertech.com>
*
* 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; i<items-1; i++) {
u32 num = lcd_gamma_tbl[i+1][0] - lcd_gamma_tbl[i][0];
for (j=0; j<num; j++) {
u32 value = 0;
value = lcd_gamma_tbl[i][1] + ((lcd_gamma_tbl[i+1][1] - lcd_gamma_tbl[i][1]) * j)/num;
info->lcd_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,
},
};
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 0
wh=1024x600, vwh=1024x1200, bpp=32, rotated=0
Turn on double buffering.
Turn on 2d hardware acceleration.
Turn on 2d hardware acceleration rotate.