rework PUSBCallbacks initialization

Author: Martino Facchin

Diff for: hardware/arduino/avr/cores/arduino/PluggableUSB.cpp

@@ -27,12 +27,6 @@
 static u8 lastIf = CDC_ACM_INTERFACE + CDC_INTERFACE_COUNT;
 static u8 lastEp = CDC_FIRST_ENDPOINT + CDC_ENPOINT_COUNT;
 
-class PUSBListNode {
-public:
-	PUSBListNode *next = NULL;
-	PUSBCallbacks cb;
-};
-
 extern u8 _initEndpoints[];
 
 //PUSBCallbacks cbs[MAX_MODULES];
@@ -46,7 +40,7 @@ int8_t PUSB_GetInterface(u8* interfaceNum)
 	int8_t ret = 0;
 	PUSBListNode* node = rootNode;
 	for (u8 i=0; i<modules_count; i++) {
-		ret = node->cb.getInterface(interfaceNum);
+		ret = node->cb->getInterface(interfaceNum);
 		node = node->next;
 	}
 	return ret;
@@ -57,7 +51,7 @@ int8_t PUSB_GetDescriptor(int8_t t)
 	int8_t ret = 0;
 	PUSBListNode* node = rootNode;
 	for (u8 i=0; i<modules_count && ret == 0; i++) {
-		ret = node->cb.getDescriptor(t);
+		ret = node->cb->getDescriptor(t);
 		node = node->next;
 	}
 	return ret;
@@ -68,24 +62,18 @@ bool PUSB_Setup(Setup& setup, u8 j)
 	bool ret = false;
 	PUSBListNode* node = rootNode;
 	for (u8 i=0; i<modules_count && ret == false; i++) {
-		ret = node->cb.setup(setup, j);
+		ret = node->cb->setup(setup, j);
 		node = node->next;
 	}
 	return ret;
 }
 
-int8_t PUSB_AddFunction(PUSBCallbacks *cb, u8* interface) 
+int8_t PUSB_AddFunction(PUSBListNode *node, u8* interface)
 {
 	if (modules_count >= MAX_MODULES) {
 		return 0;
 	}
 
-	PUSBListNode *node = new PUSBListNode;
-
-	node->cb.setup = cb->setup;
-	node->cb.getInterface = cb->getInterface;
-	node->cb.getDescriptor = cb->getDescriptor;
-
 	if (modules_count == 0) {
 		rootNode = node;
 		lastNode = node;
@@ -94,13 +82,13 @@ int8_t PUSB_AddFunction(PUSBCallbacks *cb, u8* interface)
 	}
 
 	*interface = lastIf;
-	lastIf += cb->numInterfaces;
-	for ( u8 i = 0; i< cb->numEndpoints; i++) {
-		_initEndpoints[lastEp] = cb->endpointType[i];
+	lastIf += node->cb->numInterfaces;
+	for ( u8 i = 0; i< node->cb->numEndpoints; i++) {
+		_initEndpoints[lastEp] = node->cb->endpointType[i];
 		lastEp++;
 	}
 	modules_count++;
-	return lastEp - cb->numEndpoints;
+	return lastEp - node->cb->numEndpoints;
 	// restart USB layer???
 }
 

Diff for: hardware/arduino/avr/cores/arduino/PluggableUSB.h

@@ -32,7 +32,7 @@ typedef struct
   int8_t (*getDescriptor)(int8_t t);
   int8_t numEndpoints;
   int8_t numInterfaces;
-  u8 endpointType[];
+  uint8_t *endpointType;
 } PUSBCallbacks;
 
 typedef struct
@@ -41,7 +41,14 @@ typedef struct
   u8 firstEndpoint;
 } PUSBReturn;
 
-int8_t PUSB_AddFunction(PUSBCallbacks *cb, u8 *interface);
+class PUSBListNode {
+public:
+  PUSBListNode *next = NULL;
+  PUSBCallbacks *cb;
+  PUSBListNode(PUSBCallbacks *ncb) {cb = ncb;}
+};
+
+int8_t PUSB_AddFunction(PUSBListNode *node, u8 *interface);
 
 int8_t PUSB_GetInterface(u8* interfaceNum);
 

Diff for: libraries/HID/HID.cpp

@@ -114,15 +114,22 @@ bool WEAK HID_Setup(Setup& setup, u8 i)
 // to be called by begin(), will trigger USB disconnection and reconnection
 int8_t HID_Plug(void)
 {
-	PUSBCallbacks cb;
-
-	cb.setup = &HID_Setup;
-	cb.getInterface = &HID_GetInterface;
-	cb.getDescriptor = &HID_GetDescriptor;
-	cb.numEndpoints = 1;
-	cb.numInterfaces = 1;
-	cb.endpointType[0] = EP_TYPE_INTERRUPT_IN;
-	HID_ENDPOINT_INT = PUSB_AddFunction(&cb, &HID_INTERFACE);
+	static uint8_t endpointType[1];
+
+	endpointType[0] = EP_TYPE_INTERRUPT_IN;
+
+	static PUSBCallbacks cb = {
+		.setup = &HID_Setup,
+		.getInterface = &HID_GetInterface,
+		.getDescriptor = &HID_GetDescriptor,
+		.numEndpoints = 1,
+		.numInterfaces = 1,
+		.endpointType = endpointType,
+	};
+
+	static PUSBListNode node(&cb);
+
+	HID_ENDPOINT_INT = PUSB_AddFunction(&node, &HID_INTERFACE);
 
 	_hidInterface =
 	{

Diff for: libraries/MIDIUSB/MIDIUSB.cpp

@@ -16,7 +16,7 @@
 #include "PluggableUSB.h"
 #include "MIDIUSB.h"
 
-#define MIDI_BUFFER_SIZE	128
+#define MIDI_BUFFER_SIZE	16
 
 
 static u8 MIDI_AC_INTERFACE;	// MIDI AC Interface
@@ -173,17 +173,24 @@ void MIDI_::sendMIDI(midiEventPacket_t event)
 
 int8_t MIDI_plug(void)
 {
-	PUSBCallbacks cb;
 
-	cb.setup = &MIDI_Setup;
-	cb.getInterface = &MIDI_GetInterface;
-	cb.getDescriptor = &MIDI_GetDescriptor;
-	cb.numEndpoints = 2;
-	cb.numInterfaces = 2;
-	cb.endpointType[0] = EP_TYPE_BULK_OUT_MIDI;		// MIDI_ENDPOINT_OUT
-	cb.endpointType[1] = EP_TYPE_BULK_IN_MIDI;		// MIDI_ENDPOINT_IN
+	static uint8_t endpointType[2];
 
-	MIDI_ENDPOINT_OUT = PUSB_AddFunction(&cb, &MIDI_AC_INTERFACE);
+	endpointType[0] = EP_TYPE_BULK_OUT_MIDI;	// MIDI_ENDPOINT_OUT
+	endpointType[1] = EP_TYPE_BULK_IN_MIDI;		// MIDI_ENDPOINT_IN
+
+	static PUSBCallbacks cb = {
+		.setup = &MIDI_Setup,
+		.getInterface = &MIDI_GetInterface,
+		.getDescriptor = &MIDI_GetDescriptor,
+		.numEndpoints = 1,
+		.numInterfaces = 2,
+		.endpointType = endpointType,
+	};
+
+	static PUSBListNode node(&cb);
+
+	MIDI_ENDPOINT_OUT = PUSB_AddFunction(&node, &MIDI_AC_INTERFACE);
 	MIDI_ENDPOINT_IN =  MIDI_ENDPOINT_OUT + 1;
 	MIDI_INTERFACE = MIDI_AC_INTERFACE + 1;