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CC2564: 移植Bluetopia跑spp demo时,Stack Init Failed: -4.

Part Number: CC2564

使用的是stm32 NUCLEO-F446RE开发板和CC2564蓝牙评估板,下载CC256x STM32 Bluetopia SDK,参考SDK中的文档Enable_STM32_Discovery.pdf,移植spp demo程序