diff --git a/firmware/target/arm/as3525/usb-drv-as3525v2.c b/firmware/target/arm/as3525/usb-drv-as3525v2.c
index e324a16..e7dad85 100644
--- a/firmware/target/arm/as3525/usb-drv-as3525v2.c
+++ b/firmware/target/arm/as3525/usb-drv-as3525v2.c
@@ -427,6 +427,36 @@ static void disable_global_interrupts(void)
     VIC_INT_EN_CLEAR = INTERRUPT_USB;
 }
 
+static void dump_regs(void)
+{
+    logf("DSTS: %lx", DSTS);
+    logf("DOEPCTL0=%lx", DOEPCTL(0));
+    logf("DOEPTSIZ=%lx", DOEPTSIZ(0));
+    logf("DIEPCTL0=%lx", DIEPCTL(0));
+    logf("DOEPMSK=%lx", DOEPMSK);
+    logf("DIEPMSK=%lx", DIEPMSK);
+    logf("DAINTMSK=%lx", DAINTMSK);
+    logf("DAINT=%lx", DAINT);
+    logf("GINTSTS=%lx", GINTSTS);
+    logf("GINTMSK=%lx", GINTMSK);
+    logf("DCTL=%lx", DCTL);
+    logf("GAHBCFG=%lx", GAHBCFG);
+    logf("GUSBCFG=%lx", GUSBCFG);
+    logf("DCFG=%lx", DCFG);
+    logf("DTHRCTL=%lx", DTHRCTL);
+}
+
+static void usb_tick(void)
+{
+    static int last_tick = 0;
+    if(TIME_AFTER(current_tick, last_tick + 5 * HZ))
+    {
+        logf("usb-drv: tick %ld", current_tick);
+        dump_regs();
+        last_tick = current_tick;
+    }
+}
+
 void usb_drv_init(void)
 {
     unsigned i, ep;
@@ -444,6 +474,8 @@ void usb_drv_init(void)
         wakeup_init(&endpoints[ep][DIR_OUT].complete);
     /* Enable global interrupts */
     enable_global_interrupts();
+
+    tick_add_task(&usb_tick);
 }
 
 void usb_drv_exit(void)
diff --git a/firmware/usbstack/usb_core.c b/firmware/usbstack/usb_core.c
index 549e15d..41eab28 100644
--- a/firmware/usbstack/usb_core.c
+++ b/firmware/usbstack/usb_core.c
@@ -671,7 +671,7 @@ static void request_handler_device(struct usb_ctrlrequest* req)
                 unsigned char address = req->wValue;
                 logf("usb_core: SET_ADR %d", address);
                 usb_drv_send(EP_CONTROL, NULL, 0);
-                usb_drv_cancel_all_transfers();
+                //usb_drv_cancel_all_transfers();
                 usb_address = address;
                 usb_drv_set_address(usb_address);
                 usb_state = ADDRESS;