全志F1C100s入坑与填坑 uboot Linux Kernel 与buildroot

首先获取uboot源码

git clone https://gitee.com/LicheePiNano/u-boot.git cd u-boot  # 查看分支 git branch -a # 切换到 Nano 分支 git checkout nano-lcd800480 

# 此处告知make采用arm-linux-gnueabi所有交叉编译工具的目标架构都是Arm，设置默认配置为 nano 的spiflash支持版 make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- f1c100s_nano_uboot_defconfig  # 若不带spi-flash请替换板 licheepi_nano_defconfig  # 可视化配置 make ARCH=arm menuconfig 

我在这里使用的屏幕分辨率是800 x 480 配置需要修改 第一步 ARM architecture --> Enable graphical uboot console on HDMI, LCD or VGA 为 Y 第二步 LCD panel timing details 为： x:800,y:480,depth:18,pclk\khz:33000,le:87,ri:40,up:31,lo:13,hs:1,vs:1,sync:3,vmode:0 开始编译

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- -j16 

成功生成了 u-boot-sunxi-witch-spl.bin文件 在这里u-boot已完成编译 下一步开始编译Linux

第一步 获取Linux源码

git clone https://gitee.com/LicheePiNano/Linux.git 

使用./arch/arm/configs/f1c100s_nano_linux_defconfig配置文件

make ARCH=arm f1c100s_nano_linux_defconfig 

修改设备树支持LCD屏幕

Nano源码中的设备树 linux --> arch --> arm --> boot --> dts --> suniv-f1c100s-licheepi-nano.dts；

改为适配800X480的屏，此处应当：

/ { }将包裹的根节点目录下来，panel属性下的compatible，应修改为： “lg,lb070wv8”, “simple-panel”

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- -j8   make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- -j8 INSTALL_MOD_PATH=out modules  make ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- -j8 INSTALL_MOD_PATH=out modules_install  

最后生成zImage文件与dtb文件 内核img文件：./arch/arm/boot/zImage 设备树dtb文件:./arch/arm/boot/dts/suniv-f1c100s-licheepi-nano.dtb 下一步编译buildroot

首先安装一些依赖，比如linux头文件：

apt-get install linux-headers-$(uname -r)

wget https://buildroot.org/downloads/buildroot-2021.02.4.tar.gz
tar xvf buildroot-2021.02.4.tar.gz
cd buildroot-2021.02.4/
make menuconfig

make menuconfig

以下选项为基础配置：

• Target options
  • Target Architecture (ARM (little endian))
  • Target Variant arm926t
• Toolchain
  • C library (musl) # 使用musl减小最终体积
• System configuration
  • Use syslinks to /usr … # 启用/bin, /sbin, /lib的链接
  • Enable root login # 启用root登录
  • Run a getty after boot # 启用登录密码输入窗口
  • (123456) Root password #　默认账户为root 密码为licheepi

另可自行添加或删除指定的软件包 如下图所示

开始编译！！！

make

根文件系统编译花费时间较长

把编译好的文件准备好之后下面开始烧录进flash了

烧录需要这个工具

git clone https://github.com/Icenowy/sunxi-tools.git -b f1c100s-spiflash

安装依赖库

sudo apt install libz libusb-1.0-0-dev

make
make install

在flash芯片第一脚 飞出一根线在板子USB上电时与GND连接 启动后然后断开连接 然后连接到Ubuntu 可以通过下面命令查看是否连接成功

sudo sunxi-fel ver

sunxi-fel -p spiflash-write 0 ../u-boot/u-boot-sunxi-with-spl.bin

然后等待下载完成即可完成uboot烧写

sudo sunxi-fel -p spiflash-write 0x0100000 ../Linux/arch/arm/boot/dts/suniv-f1c100s-licheepi-nano.dtb
sudo sunxi-fel -p spiflash-write 0x0110000 ../Linux/arch/arm/boot/zImage

烧写文件系统 在buildroot /licheepi_nano/buildroot-2021.02.4/output/images生成了一个rootfs.tar文件

然后解压到一个目录

sudo tar -xvf rootfs.tar -C /home/dwh/f1c100s/rootfs

使用mkfs.jffs2 工具把/rootfs转为img文件

sudo mkfs.jffs2 -s 0x100 -e 0x10000 --pad=0xAF0000 -d rootfs/ -o jffs2.img

烧录

sudo sunxi-fel -p spiflash-write 0x510000 ../../f1c100s/jffs2.img

最后看看效果吧u-boot成功启动 屏幕也显示了荔枝派开机的Logo

最后成功进入文件系统

遇到的问题，试过一次出现Linux内核启动后进入不了文件系统的情况

[    1.550893] ALSA device list:
[    1.560150]   #0: Loopback 1
[    1.569966] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
[    1.590760] cfg80211: failed to load regulatory.db
[    1.603821] EXT4-fs (mmcblk0p2): couldn't mount as ext3 due to feature incompatibilities [ 1.670528] EXT4-fs (mmcblk0p2): recovery complete [ 1.683334] EXT4-fs (mmcblk0p2): mounted filesystem with ordered data mode. Opts: (null) [ 1.703641] VFS: Mounted root (ext4 filesystem) on device 179:2. [ 1.724527] devtmpfs: mounted [ 1.738167] Freeing unused kernel memory: 1024K [ 1.814266] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module binfmt-0000, throttling... [ 6.888833] request_module: modprobe binfmt-0000 cannot be processed, kmod busy with 50 threads for more than 5 seconds now [ 6.928203] Starting init: /sbin/init exists but couldn't execute it (error -8)
[    7.029799] request_module: kmod_concurrent_max (0) close to 0 (max_modprobes: 50), for module binfmt-0000, throttling...
[   12.088839] request_module: modprobe binfmt-0000 cannot be processed, kmod busy with 50 threads for more than 5 seconds now
[   12.129497] Starting init: /bin/sh exists but couldn't execute it (error -8)
[   12.179874] Kernel panic - not syncing: No working init found.  Try passing init= option to kernel. See Linux Documentation/admin-guide/init.rst for guidance.
[   12.213491] CPU: 0 PID: 1 Comm: swapper Not tainted 4.15.0-rc8-licheepi-nano+ #4
[   12.234051] Hardware name: Allwinner suniv Family
[   12.245560] [<c010e550>] (unwind_backtrace) from [<c010b6a8>] (show_stack+0x10/0x14)
[   12.266672] [<c010b6a8>] (show_stack) from [<c0116878>] (panic+0xb8/0x230)
[   12.286927] [<c0116878>] (panic) from [<c06652bc>] (kernel_init+0xd4/0x10c)
[   12.307407] [<c06652bc>] (kernel_init) from [<c0107dc0>] (ret_from_fork+0x14/0x34)
[   12.328601] Rebooting in 5 seconds..
[   18.314583] Reboot failed -- System halted

解决方法出现编译文件系统然后出现烧录。