Banana pie bpi-m5 toss record (3) -- compile BSP

BPI Official bsp Still quite perfect , It includes u-boot、kernel、root file system And a complete tool chain, This article mainly records the compilation and replacement BSP The process of .

1 BSP The code download

Download the official BSP Code

git clone https://github.com/BPI-SINOVOIP/BPI-M5-bsp
git submodule update --init --recursive

The software package comes with toolchain, So there is no need to download and install any more ,toolchain be located toolchains Catalog ,cd Go to the catalogue and have a look ：

[email protected]:~/code/BPI5/BSP/BPI-M5-bsp/toolchains$ ls -l
total 12
drwxrwxr-x 8 zhy zhy 4096 4 month    5 10:36 gcc-linaro-7.3.1-2018.05-x86_64_aarch64-linux-gnu
drwxrwxr-x 7 zhy zhy 4096 4 month    5 10:36 gcc-linaro-aarch64-none-elf-4.8-2013.11_linux
drwxrwxr-x 7 zhy zhy 4096 4 month    5 10:36 gcc-linaro-arm-none-eabi-4.8-2014.04_linux
[email protected]:~/code/BPI5/BSP/BPI-M5-bsp/toolchains$ 

You can see that there are two versions of toolchain, among 4.8 Version is used to compile u-boot Of ,7.3 Version is used to compile kernal Of .

2 BSP The code to compile

The compilation method is relatively simple , perform BSP The compilation steps of the root directory can ：

./build.sh 

give the result as follows , There are seven compilation options , Input 1 compile uboot 、kernel, Generate rootfs.

[email protected]:~/code/BPI5/BSP/BPI-M5-bsp$ ./build.sh 
This tool support following building mode(s):
--------------------------------------------------------------------------------
	1. Build all, uboot and kernel and pack to download images.
	2. Build uboot only.
	3. Build kernel only.
	4. kernel configure.
	5. Pack the builds to target download image, this step must execute after u-boot,
	   kernel and rootfs build out
	6. Update local build to SD with BPI Image flashed
	7. Clean all build.
--------------------------------------------------------------------------------
Please choose a mode(1-7): 

After compiling, execute the script ：

./build.sh 

This choice 5, pack img, After packaging, execute the following command to compile kernal、uboot、rootfs Replace with SD In the card .

./build.sh 6

Press the prompt to enter SD The directory attached to the card is ok ：

[email protected]:~/code/BPI5/BSP/BPI-M5-bsp$ ./build.sh 6
This tool support following building mode(s):
--------------------------------------------------------------------------------
	1. Build all, uboot and kernel and pack to download images.
	2. Build uboot only.
	3. Build kernel only.
	4. kernel configure.
	5. Pack the builds to target download image, this step must execute after u-boot,
	   kernel and rootfs build out
	6. Update local build to SD with BPI Image flashed
	7. Clean all build.
--------------------------------------------------------------------------------
 Now building...

scripts/mk_install_sd.sh
--------------------------------------------------------------------------------
  1. M5/M2Pro
--------------------------------------------------------------------------------
Please choose a target to install(1-1): 1

Please type the SD device(/dev/sdX): /dev/mmcblk0

Note here SD The card must be flash Only after you have passed , in other words SD It needs to be burned in advance img, And make the development board start successfully , Not sure SD Whether the card is flash Yes, it can be used fdisk to glance at ：

sudo fdisk -l

SD The card information is as follows , You can see /dev/mmcblk0 It is divided into two partitions , This stands for SD The card is flash Yes .

Disk /dev/mmcblk0: 29.7 GiB, 31914983424 bytes, 62333952 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0xd7488a27

Device         Boot  Start      End  Sectors  Size Id Type
/dev/mmcblk0p1      204800   729087   524288  256M  c W95 FAT32 (LBA)
/dev/mmcblk0p2      729088 14940159 14211072  6.8G 83 Linux

If all operations are correct , The console will have the following log Output ：

take SD Insert the card into the development board , When you power on, you can see the same successful startup .