1 files changed, 11 insertions, 0 deletions

diff --git a/firmware/usbstack/usb_serial.c b/firmware/usbstack/usb_serial.c
index 4a80433435..e3ef4f5814 100644
--- a/firmware/usbstack/usb_serial.c
+++ b/firmware/usbstack/usb_serial.c
@@ -19,6 +19,7 @@
  *
  ****************************************************************************/
 #include "string.h"
+#include "config.h"
 #include "system.h"
 #include "usb_core.h"
 #include "usb_drv.h"
@@ -60,6 +61,11 @@ static unsigned char send_buffer[BUFFER_SIZE]
     USB_DEVBSS_ATTR __attribute__((aligned(32)));
 static unsigned char receive_buffer[32]
     USB_DEVBSS_ATTR __attribute__((aligned(32)));
+#if CONFIG_USBOTG == USBOTG_DESIGNWARE
+/* Aligned transit buffer */
+static unsigned char transit_buffer[32]
+    USB_DEVBSS_ATTR __attribute__((aligned(4)));
+#endif
 
 static void sendout(void);
 
@@ -163,8 +169,13 @@ static void sendout(void)
     if(buffer_transitlength > 0)
     {
         buffer_length -= buffer_transitlength;
+#if CONFIG_USBOTG == USBOTG_DESIGNWARE
+        memcpy(transit_buffer,&send_buffer[buffer_start],buffer_transitlength);
+        usb_drv_send_nonblocking(ep_in,transit_buffer,buffer_transitlength);
+#else
         usb_drv_send_nonblocking(ep_in, &send_buffer[buffer_start],
                 buffer_transitlength);
+#endif
     }
 }