Where FE_CTRL1, FE_CTRL2 and FE_CTRL3 are used with STM32WL55 ?

[SBaro.11]

Hi all,

I'm here beceause I have a question about STM32WL55, I have this board STM32WL55JC and I I look in CAD ressources in schematic file , there is a switch to chosse between High or Low power emission and receive mode. This switch U7 is is ordered by FE_CTRL1/2/3 but where these pin are used in STM32WLxx-HAL_Driver maybe when we call SUBGRF_SetSwitch ?

Thanks

[mckenney · Accepted solution]

They are used/configured in the BSP, e.g. stm32wlxx_nucleo_radio.[c/h]. Look for RF_SW_CTRL1_PIN (and similar).

The usage is different between the MB1389 (Nucleo) and MB1842 (i4s) reference designs. MB1842 has its own BSP.

[SBaro.11]

many thanks to you 😀