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Add fix for STM32F4 hardfault in sleep mode #12717

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Merged
merged 2 commits into from
Apr 8, 2020
Merged

Add fix for STM32F4 hardfault in sleep mode #12717

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723f311
Disable sleep on STM32F4 as an workaround for stability issues.
teetak01 Jan 23, 2020
b21aeaf
Add workaround for F429 hardfault
Mar 27, 2020
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3 changes: 3 additions & 0 deletions targets/TARGET_STM/TARGET_STM32F4/device/stm32f4xx_hal_pwr.c
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Expand Up @@ -392,6 +392,9 @@ void HAL_PWR_EnterSLEEPMode(uint32_t Regulator, uint8_t SLEEPEntry)
{
/* Request Wait For Interrupt */
__WFI();
__NOP(); // Workaround for STM32F4 errata
__NOP(); // see chapter 2.1.3 - Debugging Sleep/Stop mode with WFE/WFI entry
__NOP(); // https://www.st.com/resource/en/errata_sheet/dm00037591-stm32f405-407xx-and-stm32f415-417xx-device-limitations-stmicroelectronics.pdf
}
else
{
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