diff --git a/conf/firmwares/subsystems/fixedwing/telemetry_transparent_usb.makefile b/conf/firmwares/subsystems/fixedwing/telemetry_transparent_usb.makefile
index 420d5492502..6f4a886bb30 100644
--- a/conf/firmwares/subsystems/fixedwing/telemetry_transparent_usb.makefile
+++ b/conf/firmwares/subsystems/fixedwing/telemetry_transparent_usb.makefile
@@ -4,8 +4,8 @@
 #serial USB (e.g. /dev/ttyACM0)
 
 ifeq ($(ARCH), lpc21)
-ap.CFLAGS += -DDOWNLINK -DPERIODIC_TELEMETRY -DDOWNLINK_DEVICE=UsbS -DPPRZ_UART=UsbS
-ap.CFLAGS += -DDOWNLINK_TRANSPORT=PprzTransport -DDATALINK=PPRZ -DUSE_USB_SERIAL -DUSE_USB_HIGH_PCLK
+ap.CFLAGS += -DDOWNLINK -DPERIODIC_TELEMETRY -DDOWNLINK_DEVICE=usb_serial -DPPRZ_UART=UsbS
+ap.CFLAGS += -DDOWNLINK_TRANSPORT=pprz_tp -DDATALINK=PPRZ -DUSE_USB_SERIAL -DUSE_USB_HIGH_PCLK
 ap.srcs += subsystems/datalink/downlink.c subsystems/datalink/pprz_transport.c
 ap.srcs += $(SRC_FIRMWARE)/datalink.c
 ap.srcs += $(SRC_ARCH)/usb_ser_hw.c $(SRC_ARCH)/lpcusb/usbhw_lpc.c $(SRC_ARCH)/lpcusb/usbcontrol.c
diff --git a/conf/firmwares/subsystems/rotorcraft/telemetry_transparent_usb.makefile b/conf/firmwares/subsystems/rotorcraft/telemetry_transparent_usb.makefile
index 9dcd3bb043b..065d599df1b 100644
--- a/conf/firmwares/subsystems/rotorcraft/telemetry_transparent_usb.makefile
+++ b/conf/firmwares/subsystems/rotorcraft/telemetry_transparent_usb.makefile
@@ -2,8 +2,8 @@
 #serial USB (e.g. /dev/ttyACM0)
 
 ifeq ($(ARCH), lpc21)
-ap.CFLAGS += -DDOWNLINK -DPERIODIC_TELEMETRY -DDOWNLINK_DEVICE=UsbS -DPPRZ_UART=UsbS
-ap.CFLAGS += -DDOWNLINK_TRANSPORT=PprzTransport -DDATALINK=PPRZ -DUSE_USB_SERIAL -DDefaultPeriodic='&telemetry_Main'
+ap.CFLAGS += -DDOWNLINK -DPERIODIC_TELEMETRY -DDOWNLINK_DEVICE=usb_serial -DPPRZ_UART=UsbS
+ap.CFLAGS += -DDOWNLINK_TRANSPORT=pprz_tp -DDATALINK=PPRZ -DUSE_USB_SERIAL -DDefaultPeriodic='&telemetry_Main'
 ap.srcs += subsystems/datalink/downlink.c subsystems/datalink/pprz_transport.c subsystems/datalink/telemetry.c
 ap.srcs += $(SRC_FIRMWARE)/datalink.c $(SRC_FIRMWARE)/rotorcraft_telemetry.c
 ap.srcs += $(SRC_ARCH)/usb_ser_hw.c $(SRC_ARCH)/lpcusb/usbhw_lpc.c $(SRC_ARCH)/lpcusb/usbcontrol.c
diff --git a/sw/airborne/arch/lpc21/usb_ser_hw.c b/sw/airborne/arch/lpc21/usb_ser_hw.c
index f848426fb59..7a880dd4081 100644
--- a/sw/airborne/arch/lpc21/usb_ser_hw.c
+++ b/sw/airborne/arch/lpc21/usb_ser_hw.c
@@ -434,7 +434,7 @@ int VCOM_check_available(void)
 	@param [in] bEP
 	@param [in] bEPStatus
  */
-static void BulkOut(U8 bEP, U8 bEPStatus)
+static void BulkOut(U8 bEP, U8 bEPStatus __attribute__((unused)))
 {
 	int i, iLen;
 
@@ -463,7 +463,7 @@ static void BulkOut(U8 bEP, U8 bEPStatus)
 	@param [in] bEP
 	@param [in] bEPStatus
  */
-static void BulkIn(U8 bEP, U8 bEPStatus)
+static void BulkIn(U8 bEP, U8 bEPStatus __attribute__((unused)))
 {
 	int i, iLen;
 
@@ -541,7 +541,7 @@ static void USBIntHandler(void)
 }
 
 
-static void USBFrameHandler(U16 wFrame)
+static void USBFrameHandler(U16 wFrame __attribute__((unused)))
 {
 	if (fifo_avail(&txfifo) > 0) {
 		// data available, enable NAK interrupt on bulk in
@@ -549,6 +549,21 @@ static void USBFrameHandler(U16 wFrame)
 	}
 }
 
+// Periph with generic device API
+struct usb_serial_periph usb_serial;
+
+// Functions for the generic device API
+static int usb_serial_check_free_space(struct usb_serial_periph* p __attribute__((unused)), uint8_t len)
+{
+  return (int)VCOM_check_free_space(len);
+}
+
+static void usb_serial_transmit(struct usb_serial_periph* p __attribute__((unused)), uint8_t byte)
+{
+  VCOM_putchar(byte);
+}
+
+static void usb_serial_send(struct usb_serial_periph* p __attribute__((unused))) { }
 
 void VCOM_init(void) {
 	// initialise stack
@@ -588,6 +603,12 @@ void VCOM_init(void) {
 
 	// connect to bus
 	USBHwConnect(TRUE);
+
+  // Configure generic device
+  usb_serial.device.periph = (void *)(&usb_serial);
+  usb_serial.device.check_free_space = (check_free_space_t) usb_serial_check_free_space;
+  usb_serial.device.transmit = (transmit_t) usb_serial_transmit;
+  usb_serial.device.send_message = (send_message_t) usb_serial_send;
 }
 
 
diff --git a/sw/airborne/mcu_periph/usb_serial.h b/sw/airborne/mcu_periph/usb_serial.h
index 996da6bb4d7..3a89e729048 100644
--- a/sw/airborne/mcu_periph/usb_serial.h
+++ b/sw/airborne/mcu_periph/usb_serial.h
@@ -30,8 +30,16 @@
 
 #include <inttypes.h>
 #include "std.h"
+#include "mcu_periph/device.h"
 //#include "usb_serial_hw.h"
 
+struct usb_serial_periph {
+  /** Generic device interface */
+  struct device device;
+};
+
+extern struct usb_serial_periph usb_serial;
+
 void VCOM_init(void);
 int  VCOM_putchar(int c);
 int  VCOM_getchar(void);