Apply fix for errata 87 (FPU issue).
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@ -251,6 +251,14 @@ void vPortSuppressTicksAndSleep( TickType_t xExpectedIdleTime )
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else
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#endif
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{
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// Fix ERRATA 87 (https://infocenter.nordicsemi.com/index.jsp?topic=%252Fcom.nordic.infocenter.sdk5.v11.0.0%252Findex.html&cp=4_0_0)
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// Clear FPU interrupt before going to sleep. This prevent unexpected wake-up.
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#define FPU_EXCEPTION_MASK 0x0000009F
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/* Clear exceptions and PendingIRQ from the FPU unit */
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__set_FPSCR(__get_FPSCR() & ~(FPU_EXCEPTION_MASK));
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(void) __get_FPSCR();
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NVIC_ClearPendingIRQ(FPU_IRQn);
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/* No SD - we would just block interrupts globally.
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* BASEPRI cannot be used for that because it would prevent WFE from wake up.
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*/
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