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Differentiation between USB_OTG_HS and USB_OTG_FS in STM32F4xx

nagahimanshu7
Associate

Hi,

I am working on USB CDC on STM32F469NI. For USB_OTG_FS and USB_OTG_HS, the auto generated USB handles are

 
USBD_HandleTypeDef hUsbDeviceFS;
USBD_HandleTypeDef hUsbDeviceHS;

Is there any macro in HAL or while auto generation, that I can get to know which of the USB_OTG_xx is being used, so that I can extern the proper variable into my firmware?

Thanks,

Himanshu

2 REPLIES 2
FBL
ST Employee

Hi @nagahimanshu7 

You can define your own macros, PCD Speed is defined in HAL and you should select one of these predefined constants:
#define PCD_SPEED_HIGH USBD_HS_SPEED
#define PCD_SPEED_HIGH_IN_FULL USBD_HSINFS_SPEED
#define PCD_SPEED_FULL USBD_FS_SPEED

Using CubeMX you can select which instance to be used.

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TDK
Guru

There isn't a macro, but the choice is based on the peripheral you've configured in CubeMX. It shouldn't be a mystery. Similar to if you used I2C1 or I2C2.

If you feel a post has answered your question, please click "Accept as Solution".