143 lines
3.0 KiB
Markdown
143 lines
3.0 KiB
Markdown
# 技术点记录
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## linux 下播放音频
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```bash
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sudo apt install libasound2-dev alsa-utils
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```
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## linux 下播放视频
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```bash
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sudo apt install ffmpeg
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```
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显示安装
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```bash
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sudo apt install libdirectfb-dev # 轻量级显示服务器
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# 或
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# sudo apt install xorg
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```
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### 当前用户加入播放音频与视频的组中
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```bash
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sudo usermod -aG audio,video $USER
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```
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### 关闭屏幕帧缓冲(关闭背光)
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```bash
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# 关闭帧缓冲设备
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echo 1 | sudo tee /sys/class/graphics/fb0/blank
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# 重新打开帧缓冲设备
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echo 0 | sudo tee /sys/class/graphics/fb0/blank
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# xorg 环境，关闭背光
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xset dpms force off
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# xorg 环境，重新打开背光
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xset dpms force on
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```
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### 播放视频
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```bash
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ffplay -autoexit -fs -i video.mp4
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```
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## 编译 arm64 架构
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```bash
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CC=aarch64-linux-gnu-gcc CGO_ENABLED=1 GOOS=linux GOARCH=arm64 go build -o game-driver-arm64 .
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```
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## J8引脚
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```bash
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J8:
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3V3 (1) (2) 5V
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GPIO2 (3) (4) 5V
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GPIO3 (5) (6) GND
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GPIO4 (7) (8) GPIO14
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GND (9) (10) GPIO15
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GPIO17 (11) (12) GPIO18
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GPIO27 (13) (14) GND
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GPIO22 (15) (16) GPIO23
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3V3 (17) (18) GPIO24
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GPIO10 (19) (20) GND
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GPIO9 (21) (22) GPIO25
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GPIO11 (23) (24) GPIO8
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GND (25) (26) GPIO7
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GPIO0 (27) (28) GPIO1
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GPIO5 (29) (30) GND
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GPIO6 (31) (32) GPIO12
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GPIO13 (33) (34) GND
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GPIO19 (35) (36) GPIO16
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GPIO26 (37) (38) GPIO20
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GND (39) (40) GPIO21
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```
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## 极简桌面环境并自动登录
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### 安装 xorg i3
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```bash
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sudo apt install xorg i3-wm
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```
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### 自动启动 Xorg 和窗口管理器
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编辑 `.bashrc`文件，在文件的末尾添加以下行：
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```bash
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if [ -z "$DISPLAY" ] && [ "$(tty)" = "/dev/tty1" ]; then
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startx
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fi
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```
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这会在你登录后，自动启动 Xorg 和窗口管理器。该脚本检查当前是否在 tty1 控制台（默认终端）上
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### 自动登录
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编辑 `/etc/systemd/system/getty.target.wants/getty@tty1.service` 文件，将 `ExecStart` 行修改为：
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```bash
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ExecStart=-/sbin/agetty --autologin <your_username> --noclear %I $TERM
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```
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其中：
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- <your_username>：替换为你想自动登录的用户名。
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### 禁用 i3bar 状态栏
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编辑 `~/.config/i3/config`，将如下行注释掉：
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```bash
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# bar {
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# status_command i3status
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# }
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```
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### 配置 i3
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安装 `unclutter`：
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```bash
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sudo apt install unclutter
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```
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编辑 `~/.config/i3/config`，添加如下行：
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```bash
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exec --no-startup-id unclutter -root # 隐藏鼠标
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exec --no-startup-id xset -dpms # 关闭屏幕自动关闭
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exec --no-startup-id xset s off # 关闭屏幕保护
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```
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### 安装中文字体和 emoji 字体
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```bash
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sudo apt install fonts-noto-cjk fonts-noto-color-emoji
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```
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## 安装浏览器作为默认启动页面
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### 安装浏览器
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```bash
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sudo add-apt-repository ppa:xtradeb/apps
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sudo apt update
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sudo apt install ungoogled-chromium
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```
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### 设置默认启动页面
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编辑 `~/.config/i3/config`，添加如下行：
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```bash
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exec --no-startup-id ungoogled-chromium --kiosk --disable-extensions --disable-translate --app=<your_url>
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```
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