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CC2640开启POWER_SAVING后唤醒,使用SPI出现死机

根据调试发现死在int bspSpiWrite(const uint8_t *buf, size_t len),这个函数中的ROM_SSIDataGet(BLS_SPI_BASE, &ul);

关闭POWER_SAVING,进行调试能正常使用,这是怎么回事?