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CCS/LAUNCHXL-CC1312R1: Undefined symbol of Display

Part Number: LAUNCHXL-CC1312R1

Tool/software: Code Composer Studio

Hello,

My target is to display RSSI for the transmission. Now I just used the examples of PacketTx and PacketRx, and added the display function in the rfPacketRx.c with including <ti/display/Display.h>. But the problem showed that Display_doPrintf,  Display_doParamsInit etc. were undefined symbol. I am confused that the Display.c and Display.h already are included in the project, why still undefined. Thanks for help in advance!

Best Regards

Ethan