The goal of the document is to illustrate how to build and install SP7021 (Plus 1) image to run Raspbian on SD card. Raspbian is a famous and popular Linux distribution. It is based Debian and for running on Raspberry Pi boards. Raspbian is released in form of SD card image. Raspbian image file of SD card can be downloaded from web of Raspbian foundation. Users can then write the image file into an SD card. The SD card image consists of two partitions. One is boot partition which is formatted to DOS/Windows FAT32 file-system and the other is rootfs partition which is formatted to Linux Ext4 file-system. boot partition contains files, including boot-loader, Linux kernel image, and etc, for booting from Raspberry Pi boards. rootfs partition contains files of whole root file-system of Linux. You need to copy SP7021 boot-loader and Linux kernel image, and etc files to boot partition. Also, you need to copy some module files of Linux kernel to rootfs partition. Since SP7021 files have different file name, original files of Raspbian will not be overwritten. The new-made SD card can be boot either from Raspberry Pi boards or SP7021 boards. Please follow the following steps to build and install Plus 1 image to run Raspbian.
1. Download source files
Get latest source files from git server of SP7021 (Source files of SP7021 can be downloaded from GitHub or Yocto server of SP7021. Refer to https://github.com/sunplus-plus1/SP7021 or 2. HOW TO GET SOURCE FILE AND PACKAGE). Refer to report of ll command for the contents of top folder of source of SP7021:
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