diff --git a/USBHost_t36.h b/USBHost_t36.h
index 43e7310..86fa28b 100644
--- a/USBHost_t36.h
+++ b/USBHost_t36.h
@@ -32,8 +32,8 @@
 /*  Data Types                                  */
 /************************************************/
 
-These 6 types are the key to understanding how this USB Host
-library really works.
+// These 6 types are the key to understanding how this USB Host
+// library really works.
 
 // USBHost is a static class controlling the hardware.
 // All common USB functionality is implemented here.
@@ -175,6 +175,7 @@ struct Transfer_struct {
 class USBHost {
 public:
 	static void begin();
+	static void Task();
 protected:
 	static Pipe_t * new_Pipe(Device_t *dev, uint32_t type, uint32_t endpoint,
 		uint32_t direction, uint32_t maxlen, uint32_t interval=0);
@@ -318,6 +319,11 @@ protected:
 	// a timer event, this function is called.
 	virtual void timer_event(USBDriverTimer *whichTimer) { }
 
+	// When the user calls USBHost::Task, this Task function for all
+	// active drivers is called, so they may update state and/or call
+	// any attached user callback functions.
+	virtual void Task() { }
+
 	// When a device disconnects from the USB, this function is called.
 	// The driver must free all resources it allocated and update any
 	// internal state necessary to deal with the possibility of user
diff --git a/enumeration.cpp b/enumeration.cpp
index cbd5fce..0d7172d 100644
--- a/enumeration.cpp
+++ b/enumeration.cpp
@@ -40,6 +40,14 @@ static void pipe_set_maxlen(Pipe_t *pipe, uint32_t maxlen);
 static void pipe_set_addr(Pipe_t *pipe, uint32_t addr);
 
 
+void USBHost::Task()
+{
+	for (Device_t *dev = devlist; dev; dev = dev->next) {
+		for (USBDriver *driver = dev->drivers; driver; driver = driver->next) {
+			(driver->Task)();
+		}
+	}
+}
 
 void USBHost::driver_ready_for_device(USBDriver *driver)
 {
diff --git a/k66_usbhost.ino b/k66_usbhost.ino
index 1be6dea..8cba1a8 100644
--- a/k66_usbhost.ino
+++ b/k66_usbhost.ino
@@ -21,7 +21,7 @@
  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
-#include "USBHost.h"
+#include "USBHost_t36.h"
 
 USBHost myusb;
 USBHub hub1;
@@ -60,6 +60,7 @@ void setup()
 
 void loop()
 {
+	myusb.Task();
 }