add class flags

change keyboard_info_pool to keyboard_data

demos/host/keyboard_app.c

@@ -55,4 +55,11 @@
 void keyboard_app_task(void)
 {
 
+  for (uint8_t dev_addr = 1; dev_addr <= TUSB_CFG_HOST_DEVICE_MAX; dev_addr++)
+  {
+    if ( tusbh_device_is_configured(dev_addr) )
+    {
+
+    }
+  }
 }