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Unfortunately there is no plan to upgrade the HAL layer in WICED as it would involve significant engineering effort to do so across several platforms.
The latest STM32F4xx Standard Peripherals Drivers does not change a lot.
It mainly adds support for new STM32F413xx and STM32F423xx devices.
If WICED want to add support for STM32F413xx and STM32F423xx devices, you will have to upgrade the peripherals drivers anyway.