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April 8, 2021
Question

CubeMX LPUART Low speed external clock - possible initialization bug

  • April 8, 2021
  • 0 replies
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Hi when trying to get some of the examples for the STM32WL devkit (Nucleo-WL55JC1) working for LL LPUART serial with the external 32kHz crystal, I've noticed that LL_RCC_LSE_EnablePropagation() is never called in SystemClock_Config. It looks like this is needed for LPUART to use the crystal as its clock?

I also can't seem to find an option in CubeMX to enable LSE as a system clock for LPUART

The examples I've tried from STM32Cube_FW_WL_V1.0.0:

Examples_LL -> LPUART -> LPUART_WakeUpFromStop_Init

Examples_LL -> USART -> USART_Communication_TxRx_DMA_Init

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