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z-stack sample application CC2530 OLED

hi guys,

I want to use OLED in my project and Z stack sample application has no support for it, so i build an file with name OLED.h and I add it to the Sample Application.

When i try to use it, I got a message LCD_Init() ,which is a method i wrote inside the new file, has no  prototype.

Is that mean i can't use it inside the sample Application and if not, is there another way to use OLED for displaying info?