LP-EM-CC2340R5: How to know wake up mode from power on or shutdown

Hello Kevin

I hope you are well. For some quick context on the CC2340R5 Device, the PowerCC23X0.h file (C:\ti\simplelink_lowpower_f3_sdk_7_10_00_35\source\ti\drivers\power) has great information pertaining to your question.

1. For a wake up by power on from a power off state you could use PowerLPF3_RESET_PIN or try PowerLPF3_RESET_POR; these indicate Device reset due to pin reset, and Device booted due to power on reset respectively.

2. For the mode wakeup from a LEFT event (like left button?) from shutdown state you can use PowerLPF3_RESET_SHUTDOWN_IO (which if you configure wakeup on left button this would indicate when you’ve waked up from shutdown from the left button, or you can set it to any IO pin and send a signal when you want the device to wakeup).

If you need other power reason modes, there are more listed in the PowerCC23X0.h file. (Remember to use PowerLPF3_ResetReason, example code below setup by a Power_registerNotify callback event)

static const char *wake_up_mode_callback(PowerLPF3_ResetReason mode)
{
    switch(mode)
    {
    case PowerLPF3_RESET_PIN: return "reset due to pin reset, Mode 1";
    case PowerLPF3_RESET_SHUTDOWN_IO: return "wakeup event from left button, Mode 2";
    ...//add the other cases here as needed     
    }
}

Thanks,
Alex F