Hi.
I want to use NUCLEO-WL55JC with 32MHz crystal, not TCXO. So i do following steps according to UM2592(User manual of STM32WL Nucleo-64 board)
- No C30 and no C38 as those capacitors are integrated into the STM32WL MCU.
- SB20 OFF in order not to supply the TCXO
- C31 OFF in order not to have a 32 MHz signal coming from the TCXO
- R39 and R40 ON to connect the X3 crystal to the STM32WL MCU
I use LoraWAN_end_node project in STM32Cube_FW_WL_V1.4.0.
So i do following steps in configuration in CubeMX (also attach clock configuration)
- Select HSE as Crsytal/Ceramic Resonator instead of TCXO
- In stm32wlxx_nucleo_radio.c, BSP_RADIO_IsTCXO function returns RADIO_CONF_TCXO_NOT_SUPPORTED instead of RADIO_CONF_TCXO_SUPPORTED.
But after that, NUCLEO board give me message MAC txTimeOut instead of success tx process. While i use TCXO, there is no problem to send tx and also connect to LoraWAN.
What can i do to use standard crsytal instead of TCXO? Because i want to use my custom board, but i stuck about crystal.
