Send set interface to any hub with more than 1 interface altsetting

USBHost_t36.h

@@ -56,7 +56,7 @@
 // your best effort to read chapter 4 before asking USB questions!
 
 
-//#define USBHOST_PRINT_DEBUG
+#define USBHOST_PRINT_DEBUG
 
 /************************************************/
 /*  Data Types                                  */
@@ -563,6 +563,7 @@ protected:
 	void send_clearstatus_overcurrent(uint32_t port);
 	void send_clearstatus_reset(uint32_t port);
 	void send_setreset(uint32_t port);
+	void send_setinterface();
 	static void callback(const Transfer_t *transfer);
 	void status_change(const Transfer_t *transfer);
 	void new_port_status(uint32_t port, uint32_t status);

hub.cpp

@@ -215,6 +215,14 @@ void USBHub::send_setreset(uint32_t port)
 	}
 }
 
+void USBHub::send_setinterface()
+{
+	// assumes not already sending another control transfer
+	mk_setup(setup, 1, 11, altsetting, interface_number, 0);
+	queue_Control_Transfer(device, &setup, NULL, this);
+	sending_control_transfer = 1;
+}
+
 static uint32_t lowestbit(uint32_t bitmask)
 {
 	return __builtin_ctz(bitmask);
@@ -234,6 +242,9 @@ void USBHub::control(const Transfer_t *transfer)
 		numports = hub_desc[2];
 		characteristics = hub_desc[3];
 		powertime = hub_desc[5];
+		if (interface_count > 1) {
+			send_setinterface();
+		}
 		// TODO: do we need to use the DeviceRemovable
 		// bits to make synthetic device connect events?
 		println("Hub ports = ", numports);