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Bluetooth 4.2

大家好,我在做Bluetooth 4.2中的Bluetooth Low Energy + TI Drivers遇到了一些問題

請問在No POSIX中的Task 4 - Sending Measurement Data over BLE中

它創建一個global variable把extern uint32_t myData 加到simple_peripheral.c頂端

但我Debud完卻說 "uint32_t" is undefined有錯誤,請問我怎麼創建一個global variable讓BLE發送測量數據?