Fixed enumeration issues with low-speed devices:

- Unexpected second port-connected interrupt on cold boot with low-speed
device connected.

- Retry on failure to get device descriptor. (We still fail after three
attempts, but that is better than failing after the first one!)

Also changed eclipse project to use external builder.

Downstream/.cproject

@@ -8,6 +8,8 @@
 					<extension id="org.eclipse.cdt.core.GCCErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
 					<extension id="org.eclipse.cdt.core.GASErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
 					<extension id="org.eclipse.cdt.core.GLDErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
+					<extension id="org.eclipse.cdt.core.GmakeErrorParser" point="org.eclipse.cdt.core.ErrorParser"/>
+					<extension id="org.eclipse.cdt.core.CWDLocator" point="org.eclipse.cdt.core.ErrorParser"/>
 					<extension id="org.eclipse.cdt.core.ELF" point="org.eclipse.cdt.core.BinaryParser"/>
 				</extensions>
 			</storageModule>
@@ -45,7 +47,7 @@
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-							<builder autoBuildTarget="all" buildPath="${workspace_loc:/Downstream}/Debug" cleanBuildTarget="clean" command="${cross_make}" id="org.eclipse.cdt.build.core.internal.builder.1804403788" incrementalBuildTarget="all" keepEnvironmentInBuildfile="false" managedBuildOn="true" name="CDT Internal Builder" parallelBuildOn="true" parallelizationNumber="optimal" superClass="org.eclipse.cdt.build.core.internal.builder"/>
+							<builder buildPath="${workspace_loc:/Downstream}/Debug" id="ilg.gnuarmeclipse.managedbuild.cross.builder.2070257479" name="Gnu Make Builder" parallelBuildOn="true" parallelizationNumber="optimal" superClass="ilg.gnuarmeclipse.managedbuild.cross.builder"/>
 							<tool id="ilg.gnuarmeclipse.managedbuild.cross.tool.assembler.789837881" name="Cross ARM GNU Assembler" superClass="ilg.gnuarmeclipse.managedbuild.cross.tool.assembler">
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Downstream/Drivers/STM32F4xx_HAL_Driver/Inc/stm32f4xx_hal_hcd.h

@@ -193,6 +193,7 @@ HAL_StatusTypeDef   HAL_HCD_HC_SubmitRequest(HCD_HandleTypeDef *hhcd,
 void                HAL_HCD_IRQHandler(HCD_HandleTypeDef *hhcd);
 void                HAL_HCD_SOF_Callback(HCD_HandleTypeDef *hhcd);
 void                HAL_HCD_Connect_Callback(HCD_HandleTypeDef *hhcd);
+void                HAL_HCD_PortEnabled_Callback(HCD_HandleTypeDef *hhcd);
 void                HAL_HCD_Disconnect_Callback(HCD_HandleTypeDef *hhcd);
 void                HAL_HCD_HC_NotifyURBChange_Callback(HCD_HandleTypeDef *hhcd, 
                                                         uint8_t chnum, 

Downstream/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_hcd.c

@@ -570,6 +570,11 @@ __weak void HAL_HCD_Connect_Callback(HCD_HandleTypeDef *hhcd)
    */
 }
 
+__weak void HAL_HCD_PortEnabled_Callback(HCD_HandleTypeDef *hhcd)
+{
+
+}
+
 /**
   * @brief  Disconnection Event callback.
   * @param  hhcd: HCD handle
@@ -1055,11 +1060,11 @@ static void HCD_HC_OUT_IRQHandler  (HCD_HandleTypeDef *hhcd, uint8_t chnum)
         hhcd->hc[chnum].urb_state = URB_NOTREADY;
       }
       
-      /* re-activate the channel  */
+//      /* re-activate the channel  */
-      tmpreg = USBx_HC(chnum)->HCCHAR;
+//      tmpreg = USBx_HC(chnum)->HCCHAR;
-      tmpreg &= ~USB_OTG_HCCHAR_CHDIS;
+//      tmpreg &= ~USB_OTG_HCCHAR_CHDIS;
-      tmpreg |= USB_OTG_HCCHAR_CHENA;
+//      tmpreg |= USB_OTG_HCCHAR_CHENA;
-      USBx_HC(chnum)->HCCHAR = tmpreg;
+//      USBx_HC(chnum)->HCCHAR = tmpreg;
     }
     
     __HAL_HCD_CLEAR_HC_INT(chnum, USB_OTG_HCINT_CHH);
@@ -1174,7 +1179,7 @@ static void HCD_Port_IRQHandler  (HCD_HandleTypeDef *hhcd)
           USBx_HOST->HFIR = (uint32_t)60000;
         }
       }
-      HAL_HCD_Connect_Callback(hhcd);
+      HAL_HCD_PortEnabled_Callback(hhcd);
       
       if(hhcd->Init.speed == HCD_SPEED_HIGH)
       {

Downstream/Middlewares/ST/STM32_USB_Host_Library/Core/Inc/usbh_core.h

@@ -122,6 +122,7 @@ USBH_StatusTypeDef   USBH_LL_Start        (USBH_HandleTypeDef *phost);
 USBH_StatusTypeDef   USBH_LL_Stop         (USBH_HandleTypeDef *phost);
 
 USBH_StatusTypeDef   USBH_LL_Connect      (USBH_HandleTypeDef *phost);
+USBH_StatusTypeDef   USBH_LL_PortEnabled  (USBH_HandleTypeDef *phost);
 USBH_StatusTypeDef   USBH_LL_Disconnect   (USBH_HandleTypeDef *phost);
 USBH_SpeedTypeDef    USBH_LL_GetSpeed     (USBH_HandleTypeDef *phost);
 USBH_StatusTypeDef   USBH_LL_ResetPort    (USBH_HandleTypeDef *phost);

Downstream/Middlewares/ST/STM32_USB_Host_Library/Core/Src/usbh_core.c

@@ -24,6 +24,8 @@
   * limitations under the License.
   *
   ******************************************************************************
+  *
+  * Modifications by Robert Fisk
   */
 /* Includes ------------------------------------------------------------------*/
 
@@ -401,7 +403,7 @@ USBH_StatusTypeDef  USBH_Process(USBH_HandleTypeDef *phost)
   
   switch (phost->gState)
   {
-  case HOST_IDLE :
+  case HOST_IDLE:
     
     if (phost->device.is_connected)  
     {
@@ -836,17 +838,28 @@ USBH_StatusTypeDef  USBH_LL_Connect  (USBH_HandleTypeDef *phost)
       phost->pUser(phost, HOST_USER_CONNECTION);
     }
   }
-  else if(phost->gState == HOST_DEV_WAIT_FOR_ATTACHMENT )
+  else if (phost->gState == HOST_DEV_WAIT_FOR_ATTACHMENT)
   {
-    phost->gState = HOST_DEV_ATTACHED ;
+      //On the first boot after a power cycle with a low-speed device pre-attached,
+      //we get a second port-connected interrupt!???
+      //So go back and do the port reset again...
+      phost->gState = HOST_IDLE;
   }
-#if (USBH_USE_OS == 1)
-  osMessagePut ( phost->os_event, USBH_PORT_EVENT, 0);
-#endif 
-  
   return USBH_OK;
 }
 
+
+
+USBH_StatusTypeDef  USBH_LL_PortEnabled (USBH_HandleTypeDef *phost)
+{
+    if(phost->gState == HOST_DEV_WAIT_FOR_ATTACHMENT )
+    {
+        phost->gState = HOST_DEV_ATTACHED ;
+    }
+    return USBH_OK;
+}
+
+
 /**
   * @brief  USBH_LL_Disconnect 
   *         Handle USB Host disconnection event

Downstream/Middlewares/ST/STM32_USB_Host_Library/Core/Src/usbh_ctlreq.c

@@ -23,7 +23,10 @@
   * limitations under the License.
   *
   ******************************************************************************
+  *
+  * Modifications by Robert Fisk
   */
+
 /* Includes ------------------------------------------------------------------*/
 
 #include "usbh_ctlreq.h"
@@ -655,6 +658,12 @@ static USBH_StatusTypeDef USBH_HandleControl (USBH_HandleTypeDef *phost)
     osMessagePut ( phost->os_event, USBH_CONTROL_EVENT, 0);
 #endif      
     }
+    else if (URB_Status == USBH_URB_NOTREADY)
+    {
+        //Some mice cause a transaction error interrupt (HCINT_TXERR) at this point,
+        //so we retry and hope for the best!
+        phost->Control.state = CTRL_SETUP;
+    }
     break;
     
   case CTRL_DATA_IN:  

Downstream/Src/usbh_config.c

@@ -112,6 +112,13 @@ void HAL_HCD_Connect_Callback(HCD_HandleTypeDef *hhcd)
   USBH_LL_Connect(hhcd->pData);
 }
 
+
+void HAL_HCD_PortEnabled_Callback(HCD_HandleTypeDef *hhcd)
+{
+  USBH_LL_PortEnabled(hhcd->pData);
+}
+
+
 /**
   * @brief  SOF callback.
   * @param  hhcd: HCD handle

Upstream/.cproject

@@ -48,7 +48,7 @@
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-							<builder buildPath="${workspace_loc:/Upstream}/Debug" command="make" id="ilg.gnuarmeclipse.managedbuild.cross.builder.1480076349" name="Gnu Make Builder" parallelBuildOn="true" parallelizationNumber="optimal" superClass="ilg.gnuarmeclipse.managedbuild.cross.builder"/>
+							<builder buildPath="${workspace_loc:/Upstream}/Debug" id="ilg.gnuarmeclipse.managedbuild.cross.builder.1480076349" keepEnvironmentInBuildfile="false" name="Gnu Make Builder" parallelBuildOn="true" parallelizationNumber="optimal" superClass="ilg.gnuarmeclipse.managedbuild.cross.builder"/>
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