add PluggableUSB module

hardware/arduino/avr/cores/arduino/PluggableUSB.cpp

@@ -0,0 +1,86 @@
+/*
+  PluggableUSB.cpp
+  Copyright (c) 2015 Arduino LLC
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#include "USBAPI.h"
+#include "PluggableUSB.h"
+
+#if defined(USBCON)	
+#ifdef PLUGGABLE_USB_ENABLED
+
+#define MAX_MODULES	6
+
+static u8 startIf = CDC_ACM_INTERFACE + CDC_INTERFACE_COUNT;
+static u8 firstEp = CDC_FIRST_ENDPOINT + CDC_ENPOINT_COUNT;
+
+static u8 lastIf = CDC_ACM_INTERFACE + CDC_INTERFACE_COUNT;
+static u8 lastEp = CDC_FIRST_ENDPOINT + CDC_ENPOINT_COUNT;
+
+extern u8 _initEndpoints[];
+
+PUSBCallbacks cbs[MAX_MODULES];
+u8 modules_count = 0;
+
+int PUSB_GetInterface(u8* interfaceNum)
+{
+	int ret = 0;
+	for (u8 i=0; i<modules_count; i++) {
+		ret = cbs[i].getInterface(interfaceNum);
+	}
+	return ret;
+}
+
+int PUSB_GetDescriptor(int t)
+{
+	int ret = 0;
+	for (u8 i=0; i<modules_count && ret == 0; i++) {
+		ret = cbs[i].getDescriptor(t);
+	}
+	return ret;
+}
+
+bool PUSB_Setup(Setup& setup, u8 j)
+{
+	bool ret = false;
+	for (u8 i=0; i<modules_count && ret == false; i++) {
+		ret = cbs[i].setup(setup, j);
+	}
+	return ret;
+}
+
+int PUSB_AddFunction(PUSBCallbacks *cb, u8* interface) 
+{
+	if (modules_count >= MAX_MODULES) {
+		return 0;
+	}
+	cbs[modules_count] = *cb;
+
+	*interface = lastIf;
+	lastIf++;
+	for ( u8 i = 0; i< cb->numEndpoints; i++) {
+		_initEndpoints[lastEp] = cb->endpointType[i];
+		lastEp++;
+	}
+	modules_count++;
+	return lastEp-1;
+	// restart USB layer???
+}
+
+#endif
+
+#endif /* if defined(USBCON) */

hardware/arduino/avr/cores/arduino/PluggableUSB.h

@@ -0,0 +1,55 @@
+/*
+  PluggableUSB.h
+  Copyright (c) 2015 Arduino LLC
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef PUSB_h
+#define PUSB_h
+
+#include "USBAPI.h"
+#include <stdint.h>
+
+#if defined(USBCON)
+
+typedef struct
+{
+  bool (*setup)(Setup& setup, u8 i);
+  int (*getInterface)(u8* interfaceNum);
+  int (*getDescriptor)(int t);
+  int numEndpoints;
+  u8 endpointType[6];
+} PUSBCallbacks;
+
+typedef struct
+{
+  u8 interface;
+  u8 firstEndpoint;
+} PUSBReturn;
+
+int PUSB_AddFunction(PUSBCallbacks *cb, u8 *interface);
+
+int PUSB_GetInterface(u8* interfaceNum);
+
+int PUSB_GetDescriptor(int t);
+
+bool PUSB_Setup(Setup& setup, u8 i);
+
+void PUSB_Begin();
+
+#endif
+
+#endif

hardware/arduino/avr/cores/arduino/USBCore.cpp

@@ -17,6 +17,7 @@
 */
 
 #include "USBAPI.h"
+#include "PluggableUSB.h"
 
 #if defined(USBCON)
 
@@ -323,8 +324,14 @@ u8 _initEndpoints[] =
 	EP_TYPE_BULK_IN,			// CDC_ENDPOINT_IN
 #endif
 
-#ifdef HID_ENABLED
-	EP_TYPE_INTERRUPT_IN		// HID_ENDPOINT_INT
+#ifdef PLUGGABLE_USB_ENABLED
+	//allocate 6 endpoints and remove const so they can be changed by the user
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
 #endif
 };
 
@@ -365,9 +372,8 @@ bool ClassInterfaceRequest(Setup& setup)
 		return CDC_Setup(setup);
 #endif
 
-#ifdef HID_ENABLED
-	if (HID_INTERFACE == i)
-		return HID_Setup(setup);
+#ifdef PLUGGABLE_USB_ENABLED
+	return PUSB_Setup(setup, i);
 #endif
 	return false;
 }
@@ -447,8 +453,8 @@ int SendInterfaces()
 	total = CDC_GetInterface(&interfaces);
 #endif
 
-#ifdef HID_ENABLED
-	total += HID_GetInterface(&interfaces);
+#ifdef PLUGGABLE_USB_ENABLED
+	PUSB_GetInterface(&interfaces);
 #endif
 
 	return interfaces;
@@ -477,14 +483,17 @@ u8 _cdcComposite = 0;
 static
 bool SendDescriptor(Setup& setup)
 {
+	int ret;
 	u8 t = setup.wValueH;
 	if (USB_CONFIGURATION_DESCRIPTOR_TYPE == t)
 		return SendConfiguration(setup.wLength);
 
 	InitControl(setup.wLength);
-#ifdef HID_ENABLED
-	if (HID_REPORT_DESCRIPTOR_TYPE == t)
-		return HID_GetDescriptor(t);
+#ifdef PLUGGABLE_USB_ENABLED
+	ret = PUSB_GetDescriptor(t);
+	if (ret != 0) {
+		return (ret > 0 ? true : false);
+	}
 #endif
 
 	const u8* desc_addr = 0;

hardware/arduino/avr/cores/arduino/USBCore.h

@@ -18,6 +18,8 @@
 #ifndef __USBCORE_H__
 #define __USBCORE_H__
 
+#include "USBAPI.h"
+
 //	Standard requests
 #define GET_STATUS			0
 #define CLEAR_FEATURE		1

hardware/arduino/avr/cores/arduino/USBDesc.h

@@ -17,7 +17,7 @@
 */
 
 #define CDC_ENABLED
-#define HID_ENABLED
+#define PLUGGABLE_USB_ENABLED
 
 
 #ifdef CDC_ENABLED