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CC2640R2F 关于 standby唤醒疑问?

Other Parts Discussed in Thread: LAUNCHXL-CC2640R2

您好,请教一下,进入standby,文档提示可以RTC唤醒,是使用Util_constructClock创建定时器,还是用Timer定时呢?

我用Util_constructClock定时3秒设置 Power_releaseConstraint(POWERCC26XX_SB_DISALLOW) ,可以进入低功耗,但3秒后执行Power_setConstraint (POWERCC26XX_SB_DISALLOW) ,发现并不能唤醒,是否不是使用这个,而是使用Timer?是否有例程可以参考如何RTC唤醒,谢谢