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__HAL_RCC_USB_OTG_FS_CLK_ENABLE macro
Enable or disable the AHB2 peripheral clock.
Syntax
#define __HAL_RCC_USB_OTG_FS_CLK_ENABLE() do {(RCC->AHB2ENR |= (RCC_AHB2ENR_OTGFSEN));\
__HAL_RCC_SYSCFG_CLK_ENABLE();\
}while(0U)
Notes
After reset, the peripheral clock (used for registers read/write access) is disabled and the application software has to enable this clock before using it.