CCS/AWR1843BOOST: Hwo to use the demo source code in mmWave SDK with CCS9.0 ?

Tool/software: Code Composer Studio

Here's what I do.

First, I create a project and choose the "Makefile Project with Existing Code" in CCS9.0。

Then,import the existing source code into the project.

Last,I rebuilt the project.

Error :

**** Build of configuration Default for project AWR1843Demo ****

"C:\\ti\\ccs910\\ccs\\utils\\bin\\gmake" -k all

/ti/common/mmwave_sdk.mak:48: *** Please set the environment variable MMWAVE_SDK_DEVICE.. Stop.

**** Build Finished ****