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To build image of SPI-NOR flash, first, you need to get source files of SP7021 from git server of SP7021. Second, you need to run make to build all images of SP7021. After make processes complete successfully, it will create a two binary file files named spi_all.bin and ISPBOOOT.BIN. Third, you need to either use flash programmer to write the spi_all.bin to SPI-NOR flash . Finally, plug the written or copy ISPBOOOT.BIN to an USB drive to in-system program SPI-NOR flash into socket of SPI-NOR (SOC-8) on your SP7021 board. Finally, set DIP-SW to “boot from SPI-NOR flash”. You are now ready to turn on SP7021 power to boot Linux from SPI-NOR flash. For details, please follow the following steps.
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