buildroot开发基础一

妖狐艹你老母 2023-01-19 09:41 12阅读 0赞

1，在板子加了新内核驱动，可以参考[mty][]教程直接把分散的需要更新的文件patch打进去我们的sdk

2，. envsetup.sh 选择的是buildroot的配置控制生成EXT4，make menuconfig之后会在buildroot/output/target下生成.config文件，make savedefconfig之会把新配置内容覆盖到buildroot\\configs对应的配置文件下

3，./build.sh lunch 选择的是内核配置，DTS这些

4，dts文件放在kernel\\arch\\arm\\boot\\dts目录下，一般内核驱动放在kernel\\drivers\\media下。内核驱动的开发需要先在这个目录下做好内核芯片驱动，之后要在buildroot根文件系统中写好上层调用驱动。

5，buildroot的配置文件在device\\rockchip\\.BoardConfig.mk，内容如下：

#!/bin/bash
    
    # Target arch
    export RK_ARCH=arm
    # Uboot defconfig
    export RK_UBOOT_DEFCONFIG=rv1126
    # Uboot image format type: fit(flattened image tree)
    export RK_UBOOT_FORMAT_TYPE=fit
    # Kernel defconfig
    export RK_KERNEL_DEFCONFIG=rv1126_defconfig
    # Kernel defconfig fragment
    export RK_KERNEL_DEFCONFIG_FRAGMENT=
    # Kernel dts
    export RK_KERNEL_DTS=rv11xx-owl-ai-box-v10
    # boot image type
    export RK_BOOT_IMG=zboot.img
    # kernel image path
    export RK_KERNEL_IMG=kernel/arch/arm/boot/zImage
    # kernel image format type: fit(flattened image tree)
    export RK_KERNEL_FIT_ITS=boot.its
    # parameter for GPT table
    export RK_PARAMETER=parameter-buildroot-fit.txt
    # Buildroot config
    export RK_CFG_BUILDROOT=rockchip_rv1126_rv1109
    # Recovery config
    export RK_CFG_RECOVERY=rockchip_rv1126_rv1109_recovery
    # Recovery image format type: fit(flattened image tree)
    export RK_RECOVERY_FIT_ITS=boot4recovery.its
    # ramboot config
    export RK_CFG_RAMBOOT=
    # Pcba config
    export RK_CFG_PCBA=
    # Build jobs
    export RK_JOBS=12
    # target chip
    export RK_TARGET_PRODUCT=rv1126_rv1109
    # Set rootfs type, including ext2 ext4 squashfs
    export RK_ROOTFS_TYPE=ext4
    # rootfs image path
    export RK_ROOTFS_IMG=rockdev/rootfs.${RK_ROOTFS_TYPE}
    # Set ramboot image type
    export RK_RAMBOOT_TYPE=
    # Set oem partition type, including ext2 squashfs
    export RK_OEM_FS_TYPE=ext2
    # Set userdata partition type, including ext2, fat
    export RK_USERDATA_FS_TYPE=ext2
    #OEM config
    export RK_OEM_DIR=oem_ipc
    # OEM build on buildroot
    export RK_OEM_BUILDIN_BUILDROOT=YES
    #userdata config, if not define this, system will format by RK_USERDATA_FS_TYPE
    export RK_USERDATA_DIR=userdata_normal
    #misc image
    export RK_MISC=wipe_all-misc.img
    #choose enable distro module
    export RK_DISTRO_MODULE=
    # Define pre-build script for this board
    export RK_BOARD_PRE_BUILD_SCRIPT=app-build.sh

内核驱动的开关文件在kernel/arch/arm/configs，具体是哪个配置文件，在device\\rockchip\\.BoardConfig.mk文件中的export RK\_KERNEL\_DEFCONFIG有说明。例如

# CONFIG_USB_GSPCA is not set
    CONFIG_V4L_PLATFORM_DRIVERS=y
    CONFIG_VIDEO_ROCKCHIP_CIF=y
    CONFIG_VIDEO_ROCKCHIP_ISP=y
    CONFIG_VIDEO_ROCKCHIP_ISPP=y
    # CONFIG_MEDIA_SUBDRV_AUTOSELECT is not set
    CONFIG_VIDEO_LT6911UXC=y
    # CONFIG_VIDEO_ADV7181 is not set

[mty]: https://gitee.com/owlvisiontech/owlvtech-patch-rv1126/wikis/%E7%BC%96%E8%AF%91%E5%89%8D%E7%9A%84%E5%87%86%E5%A4%87?sort_id=2876114