Fix unused warning to make gcc happy.

STMicroelectronics / stm32f4xx-hal-driver

Provides the STM32Cube MCU Component "hal_driver" of the STM32F4 series.

BSD 3-Clause "New" or "Revised" License

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Closed Linjieqiang closed 3 years ago

Linjieqiang commented 3 years ago

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