Getting error while building the code

[Piyush_9536]

I am using sdk 17.1.0 .I am getting error while using bsp_buttons_is_pressed function in main although i have included file bsp.h ,bsp_btn_ble.h,  boards.h. The error is  Error: L6218E: Undefined symbol bsp_buttons_is_pressed (referred from main.o). Please guide me.

Thanks in advance

[Amanda Hsieh]

Hi, 

although i have included file bsp.h ,bsp_btn_ble.h,  boards.h.

Do you include those files as the Including header files doc? If, not. Please refer to it and try again. 

-Amanda