This test case provides the following tests:
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EXT0 wake up test, we use rtc_io 34 as trigger source. After entering light_sleep mode, set this io low will wake up system.
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EXT1 wake up test, we use rtc_io 34, 35, 36 and 39 as trigger source. After entering light_sleep mode, set them all low at the sametime will wake system up.
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Timer wakeup, 50 seconds later , system will waked up by timer after entering light_sleep mode.
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Touch_Pad wake_up, touch pad_7 will wake up system during light_sleep mode.
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After system waked up, you can run
Deep_sleep get wake_up cause test
to get what waked the system up.