SAM: add iSerial USB field

Author: facchinm

hardware/arduino/sam/cores/arduino/USB/PluggableUSB.cpp

@@ -52,6 +52,15 @@ int PluggableUSB_::getDescriptor(USBSetup& setup)
 	return 0;
 }
 
+void PluggableUSB_::getShortName(char *iSerialNum)
+{
+	PluggableUSBModule* node;
+	for (node = rootNode; node; node = node->next) {
+		iSerialNum += node->getShortName(iSerialNum);
+	}
+	*iSerialNum = 0;
+}
+
 bool PluggableUSB_::setup(USBSetup& setup)
 {
 	PluggableUSBModule* node;

hardware/arduino/sam/cores/arduino/USB/PluggableUSB.h

@@ -35,6 +35,7 @@ class PluggableUSBModule {
   virtual bool setup(USBSetup& setup) = 0;
   virtual int getInterface(uint8_t* interfaceCount) = 0;
   virtual int getDescriptor(USBSetup& setup) = 0;
+  virtual uint8_t getShortName(char *name) { name[0] = 'A'+pluggedInterface; return 1; }
 
   uint8_t pluggedInterface;
   uint8_t pluggedEndpoint;
@@ -55,6 +56,7 @@ class PluggableUSB_ {
   int getInterface(uint8_t* interfaceCount);
   int getDescriptor(USBSetup& setup);
   bool setup(USBSetup& setup);
+  void getShortName(char *iSerialNum);
 
 private:
   uint8_t lastIf;

hardware/arduino/sam/cores/arduino/USB/USBCore.cpp

@@ -96,10 +96,10 @@ const uint8_t STRING_MANUFACTURER[12] = USB_MANUFACTURER;
 
 //	DEVICE DESCRIPTOR
 const DeviceDescriptor USB_DeviceDescriptor =
-	D_DEVICE(0x00,0x00,0x00,64,USB_VID,USB_PID,0x100,IMANUFACTURER,IPRODUCT,0,1);
+	D_DEVICE(0x00,0x00,0x00,64,USB_VID,USB_PID,0x100,IMANUFACTURER,IPRODUCT,ISERIAL,1);
 
 const DeviceDescriptor USB_DeviceDescriptorA =
-	D_DEVICE(0xEF,0x02,0x01,64,USB_VID,USB_PID,0x100,IMANUFACTURER,IPRODUCT,0,1);
+	D_DEVICE(0xEF,0x02,0x01,64,USB_VID,USB_PID,0x100,IMANUFACTURER,IPRODUCT,ISERIAL,1);
 
 const QualifierDescriptor USB_DeviceQualifier =
 	D_QUALIFIER(0x00,0x00,0x00,64,1);
@@ -429,6 +429,13 @@ static bool USBD_SendDescriptor(USBSetup& setup)
 		else if (setup.wValueL == IMANUFACTURER) {
 			return USB_SendStringDescriptor(STRING_MANUFACTURER, setup.wLength);
 		}
+		else if (setup.wValueL == ISERIAL) {
+#ifdef PLUGGABLE_USB_ENABLED
+			char name[ISERIAL_MAX_LEN];
+			PluggableUSB().getShortName(name);
+			return USB_SendStringDescriptor((uint8_t*)name, setup.wLength);
+#endif
+		}
 		else {
 			return false;
 		}

hardware/arduino/sam/cores/arduino/USB/USBDesc.h

@@ -42,7 +42,10 @@
 #define CDC_TX CDC_ENDPOINT_IN
 #endif
 
+#define ISERIAL_MAX_LEN	20
+
 #define IMANUFACTURER	1
 #define IPRODUCT		2
+#define ISERIAL			3
 
 #endif /* __USBDESC_H__ */

hardware/arduino/sam/libraries/HID/HID.cpp

@@ -57,6 +57,16 @@ int HID_::getDescriptor(USBSetup& setup)
 	return total;
 }
 
+uint8_t HID_::getShortName(char *name)
+{
+	name[0] = 'H';
+	name[1] = 'I';
+	name[2] = 'D';
+	name[3] = 'A' + (descriptorSize & 0x0F);
+	name[4] = 'A' + ((descriptorSize >> 4) & 0x0F);
+	return 5;
+}
+
 void HID_::AppendDescriptor(HIDSubDescriptor *node)
 {
 	if (!rootNode) {

hardware/arduino/sam/libraries/HID/HID.h

@@ -96,6 +96,7 @@ class HID_ : public PluggableUSBModule
   int getInterface(uint8_t* interfaceCount);
   int getDescriptor(USBSetup& setup);
   bool setup(USBSetup& setup);
+  uint8_t getShortName(char* name);
 
 private:
   uint32_t epType[1];