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CC2541 無法使用GAPRole_GetParameter取得自己的MAC address?

Other Parts Discussed in Thread: CC2541

如題,我在peripheral的SimpleBLEPeripheral_Init(),直接call下列function,無法取得MAC address,這是為何?

uint8 ownAddress[B_ADDR_LEN];
GAPRole_GetParameter(GAPROLE_BD_ADDR, ownAddress);