When spi.port=16 in the wiced_spi_flash definition, the init may be re written in the stm32fxxx_platform.c as the use of the wiced init wiced_spi_init makes the platform crash :
BCM9WCDUSI09 eval board
spi to communicate with a 433 MHz tranceiver
Thank you for the extra information.
This has highlighted an item that's been on our todo list and has now been bumped up in priority.