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CC2541 FLASH NV函数使用困惑



使用“SimpleBLECentral”工程,想要掉电保存数据,发现osal_snv_read(0x80, 16, pBuffer); osal_snv_write(0X80, 16, pBuffer)均返回返回 "NV_OPER_FAILED”,  遂向上查找原因,发现osal_snv_init()初始化,返回失败 "FAILURE”, 请教如何正常使用NV,需要做哪些配置或者声明?