When I run the code in jupter notebook “1 - Connecting to Hardware”, I rewrite the platform name to CW308_STM32F3 which is my target board. Then I found it is a invalid platform
You need to pass CW308_STM32F3 to the PLATFORM parameter, and leave CRYPTO_TARGET to “none”:
make PLATFORM=CW308_STM32F3 CRYPTO_TARGET=NONE