Reinventing the Wheel, because why not
should be slightly better than the USB CDC provided by stm32cubemx in terms of speed and code size, didn't bother to actually get some data.
create instances of the handles:
SWHAL_USB_PCD_HandleTypeDef swpcd;
SWHAL_USB_CDC_HandleTypeDef swcdc;
then call init function:
SWHAL_USB_CDC_Init(&hpcd_USB_FS, &swpcd, &swcdc);
then use SWHAL_USB_CDC_Transmit and SWHAL_USB_CDC_Receive
- receive buffer need to be 32-bit aligned and must be 64 bytes long
- have been tested on stm32l151(USB_FS) and stm32l411(USB_OTG), basic function should work fine