FreeRTOS running, SUCCESS!
CDC receive is called when data arrive on usb (if yu ever started data rececption)
if you want to kwon who call who clik on fucntion ” call hieracachy ” feature (Ctrl + Alt +H )
All the class and itf and driver indirection make it a bit harder to find
it is called indretcly via USBD_Interface_fops_FS “Receive”
if youn open the struct and find call tree of “Receive”
you will se it get called from
USBD_CDC_DataOut that fucntion is al
that one is again indirectky caledl by “DataIn” field of typedef struct _Device_cb
One that struct “DataIn” is finaly called from usb stack all way down from USB interrupt
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