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Get latest code from git server of SP7021 (2. HOW TO GET SOURCE FILE AND PACKAGE ) and run make config command on top folder. After configuration menu pops up, first, choose board you want to build image for. For example, press 3 for SP7021 Demo Board (V3). Press enter and then Second, press 1 for selecting C-chip. Finally, press 4 and then enter to start to configure building environment. Refer to screenshot below,
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