make rootfs BR2_ROOTFS_OVERLAY=../buildroot/output/target After a successful install and build, package the working SDK for colleagues:

wine ISPTool.exe -f ssd222_firmware.bin Copy ssd222_firmware.bin to a FAT32 SD card as auto_update.bin . Insert into the board and power on.

sudo apt update sudo apt install -y build-essential git libssl-dev bc u-boot-tools \ bison flex libncurses5-dev gcc-arm-linux-gnueabihf g++-arm-linux-gnueabihf \ liblz4-tool device-tree-compiler wget unzip cpio rsync python3 \ python-is-python3 libxml2-utils lzma SigmaStar SDKs typically include a custom toolchain inside the SDK ( toolchain/ directory). However, some older versions require a pre-installed Linaro toolchain. Check your SDK release notes. If needed:

make uboot # Build only U-Boot make kernel # Build only kernel make rootfs # Build root filesystem make image # Pack final firmware image | Error Message | Likely Cause | Solution | |---|---|---| | /bin/sh: 1: lzop: not found | Missing LZO compression tool | sudo apt install lzop | | arm-linux-gnueabihf-gcc: No such file | Path not set or broken toolchain | Re-run source setup_sdk_env.sh | | xxx.h: No such file or directory | Kernel headers missing | Run ./install.sh inside SDK | | dtc: not found | Device Tree Compiler missing | sudo apt install device-tree-compiler | | multiple definition of yylloc | Flex/Bison version mismatch | Use Ubuntu 20.04 or patch Makefile | Part 5: Post-Install – Output Files and Flashing 5.1 Locating the Final Firmware After a successful make all , look in:

setenv serverip 192.168.1.100 setenv ipaddr 192.168.1.50 tftp 0x22000000 ssd222_firmware.bin sf probe 0 sf erase 0x0 0x800000 sf write 0x22000000 0x0 0x800000 reset 6.1 Working with Multiple SDK Versions SigmaStar iterates quickly. Use directory versioning:

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