Fixed bug #786.

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@9879 35acf78f-673a-0410-8e92-d51de3d6d3f4

os/hal/ports/STM32/LLD/OTGv1/hal_usb_lld.c

@@ -414,11 +414,17 @@ static void otg_epout_handler(USBDriver *usbp, usbep_t ep) {
     /* Setup packets handling, setup packets are handled using a
        specific callback.*/
     _usb_isr_invoke_setup_cb(usbp, ep);
-
   }
   if ((epint & DOEPINT_XFRC) && (otgp->DOEPMSK & DOEPMSK_XFRCM)) {
-    /* Receive transfer complete.*/
-    USBOutEndpointState *osp = usbp->epc[ep]->out_state;
+    USBOutEndpointState *osp;
+
+    /* Receive transfer complete, checking if it is a SETUP transfer on EP0,
+       that it must be ignored, the STUPM handler will take care of it.*/
+    if ((ep == 0) && (usbp->ep0state == USB_EP0_WAITING_SETUP))
+      return;
+
+    /* OUT state structure pointer for this endpoint.*/
+    osp = usbp->epc[ep]->out_state;
 
     /* A short packet always terminates a transaction.*/
     if (((osp->rxcnt % usbp->epc[ep]->out_maxsize) == 0) &&

readme.txt

@@ -147,6 +147,8 @@
 - RT:  Merged RT4.
 - NIL: Merged NIL2.
 - NIL: Added STM32F7 demo.
+- HAL: Fixed OTGv1 driver not functional on STM32L4 (bug #786)(backported
+       to 16.1.6).
 - HAL: Fixed wrong bit offset in STM32F37x ADC_CR2_EXTSEL_SRC() macro
        (bug #785)(backported to 16.1.6, 3.0.6).
 - RT:  Fixed tick-less mode can fail in RT for very large delays (bug #784)