stm32: Only enable one direction on usbfs double buffered end points

The bulk out endpoint should not be enabled in tx mode, and the bulk
in endpoint should not be enabled in rx mode.

Signed-off-by: Kevin O'Connor <[email protected]>

Author: KevinOConnor

src/stm32/usbfs.c

@@ -342,12 +342,12 @@ usb_reset(void)
 
     ep = USB_CDC_EP_BULK_OUT;
     USB_EPR[ep] = (USB_CDC_EP_BULK_OUT | USB_EP_BULK | USB_EP_KIND
-                   | USB_EP_RX_VALID | USB_EP_TX_NAK | USB_EP_DTOG_TX);
+                   | USB_EP_RX_NAK | USB_EP_DTOG_TX);
     bulk_out_push_flag = USB_EP_DTOG_TX;
 
     ep = USB_CDC_EP_BULK_IN;
     USB_EPR[ep] = (USB_CDC_EP_BULK_IN | USB_EP_BULK | USB_EP_KIND
-                   | USB_EP_RX_NAK | USB_EP_TX_NAK);
+                   | USB_EP_TX_NAK);
     bulk_in_pop_flag = USB_EP_DTOG_RX;
 
     USB->CNTR = USB_CNTR_CTRM | USB_CNTR_RESETM;