Commit348fdc4

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Use more efficient mode for STM32L4XX stop mode (#1097)

Co-authored-by: Frederic Pillon <frederic.pillon@st.com>

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+14

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Lines changed: 14 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -223,12 +223,24 @@ void LowPower_stop(serial_t *obj)`
`223`	`223`	`HAL_PWREx_EnableFastWakeUp();`
`224`	`224`	`#endif`
`225`	`225`	`#ifdef__HAL_RCC_WAKEUPSTOP_CLK_CONFIG`
`226`		`-/* Select HSI as system clock source after Wake Up from Stop mode */`
	`226`	`+/* Select MSI or HSI as system clock source after Wake Up from Stop mode */`
	`227`	`+#ifdefRCC_STOP_WAKEUPCLOCK_MSI`
	`228`	`+__HAL_RCC_WAKEUPSTOP_CLK_CONFIG(RCC_STOP_WAKEUPCLOCK_MSI);`
	`229`	`+#else`
`227`	`230`	`__HAL_RCC_WAKEUPSTOP_CLK_CONFIG(RCC_STOP_WAKEUPCLOCK_HSI);`
	`231`	`+#endif`
`228`	`232`	`#endif`
`229`	`233`
`230`	`234`	`/* Enter Stop mode */`
`231`		`-HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON,PWR_STOPENTRY_WFI);`
	`235`	`+#if defined(STM32L4xx)`
	`236`	`+if ((WakeUpUart==NULL)\|\| (WakeUpUart->Instance== (USART_TypeDef*)LPUART1_BASE)) {`
	`237`	`+// STM32L4xx supports STOP2 mode which halves consumption`
	`238`	`+HAL_PWREx_EnterSTOP2Mode(PWR_STOPENTRY_WFI);`
	`239`	`+ }else`
	`240`	`+#endif`
	`241`	`+ {`
	`242`	`+HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON,PWR_STOPENTRY_WFI);`
	`243`	`+ }`
`232`	`244`
`233`	`245`	`/* Exit Stop mode reset clocks */`
`234`	`246`	`SystemClock_ConfigFromStop();`

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