diff --git a/firmware/hw_layer/openblt/openblt.mk b/firmware/hw_layer/openblt/openblt.mk
index d91250ada8..a3a4e75fde 100644
--- a/firmware/hw_layer/openblt/openblt.mk
+++ b/firmware/hw_layer/openblt/openblt.mk
@@ -85,6 +85,18 @@ PROJ_FILES += $(PROJECT_DIR)/hw_layer/openblt/led.h
PROJ_FILES += $(PROJECT_DIR)/hw_layer/openblt/shared_params.c
PROJ_FILES += $(PROJECT_DIR)/hw_layer/openblt/shared_params.h
PROJ_FILES += $(PROJECT_DIR)/hw_layer/openblt/usbd_core.h
+PROJ_FILES += $(PROJECT_DIR)/hw_layer/openblt/usbd_conf.h
+PROJ_FILES += $(PROJECT_DIR)/hw_layer/openblt/usbd_def.h
+PROJ_FILES += $(PROJECT_DIR)/hw_layer/openblt/usbd_desc.c
+PROJ_FILES += $(PROJECT_DIR)/hw_layer/openblt/usbd_desc.h
+PROJ_FILES += $(PROJECT_DIR)/hw_layer/openblt/usbd_ctlreq.h
+PROJ_FILES += $(PROJECT_DIR)/ext/openblt/Target/Demo/ARMCM4_STM32F4_Nucleo_F429ZI_GCC/Boot/usbd_bulk.h
+PROJ_FILES += $(PROJECT_DIR)/ext/openblt/Target/Demo/ARMCM4_STM32F4_Nucleo_F429ZI_GCC/Boot/lib/STM32_USB_Device_Library/Core/Src/usbd_core.c
+PROJ_FILES += $(PROJECT_DIR)/ext/openblt/Target/Demo/ARMCM4_STM32F4_Nucleo_F429ZI_GCC/Boot/lib/STM32_USB_Device_Library/Core/Src/usbd_ctlreq.c
+PROJ_FILES += $(PROJECT_DIR)/ext/openblt/Target/Demo/ARMCM4_STM32F4_Nucleo_F429ZI_GCC/Boot/lib/STM32_USB_Device_Library/Core/Src/usbd_ioreq.c
+PROJ_FILES += $(PROJECT_DIR)/ext/openblt/Target/Source/backdoor.c
+PROJ_FILES += $(PROJECT_DIR)/ext/openblt/Target/Demo/ARMCM4_STM32F4_Nucleo_F429ZI_GCC/Boot/usbd_bulk.c
+PROJ_FILES += $(PROJECT_DIR)/ext/openblt/Target/Demo/ARMCM4_STM32F4_Nucleo_F429ZI_GCC/Boot/usbd_conf.c
# CPU-dependent sources
ifeq ($(PROJECT_CPU),ARCH_STM32F4)
diff --git a/firmware/hw_layer/openblt/usbd_conf.h b/firmware/hw_layer/openblt/usbd_conf.h
new file mode 100644
index 0000000000..80c3498403
--- /dev/null
+++ b/firmware/hw_layer/openblt/usbd_conf.h
@@ -0,0 +1,176 @@
+/* USER CODE BEGIN Header */
+/**
+ ******************************************************************************
+ * @file : usbd_conf.h
+ * @version : v1.0_Cube
+ * @brief : Header for usbd_conf.c file.
+ ******************************************************************************
+ * @attention
+ *
+ * © Copyright (c) 2021 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under Ultimate Liberty license
+ * SLA0044, the "License"; You may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at:
+ * www.st.com/SLA0044
+ *
+ ******************************************************************************
+ */
+/* USER CODE END Header */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __USBD_CONF__H__
+#define __USBD_CONF__H__
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include
+#include
+#include
+#include "stm32f4xx.h"
+#include "stm32f4xx_hal.h"
+
+/* USER CODE BEGIN INCLUDE */
+
+/* USER CODE END INCLUDE */
+
+/** @addtogroup USBD_OTG_DRIVER
+ * @brief Driver for Usb device.
+ * @{
+ */
+
+/** @defgroup USBD_CONF USBD_CONF
+ * @brief Configuration file for Usb otg low level driver.
+ * @{
+ */
+
+/** @defgroup USBD_CONF_Exported_Variables USBD_CONF_Exported_Variables
+ * @brief Public variables.
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+/** @defgroup USBD_CONF_Exported_Defines USBD_CONF_Exported_Defines
+ * @brief Defines for configuration of the Usb device.
+ * @{
+ */
+
+/*---------- -----------*/
+#define USBD_MAX_NUM_INTERFACES 1U
+/*---------- -----------*/
+#define USBD_MAX_NUM_CONFIGURATION 1U
+/*---------- -----------*/
+#define USBD_MAX_STR_DESC_SIZ 512U
+/*---------- -----------*/
+#define USBD_DEBUG_LEVEL 0U
+/*---------- -----------*/
+#define USBD_LPM_ENABLED 0U
+/*---------- -----------*/
+#define USBD_SELF_POWERED 1U
+
+/****************************************/
+/* #define for FS and HS identification */
+#define DEVICE_FS 0
+#define DEVICE_HS 1
+
+/* Inform USB core that a full speed device is used. */
+#define USE_USB_FS
+
+/**
+ * @}
+ */
+
+/** @defgroup USBD_CONF_Exported_Macros USBD_CONF_Exported_Macros
+ * @brief Aliases.
+ * @{
+ */
+
+/* Memory management macros */
+
+/** Alias for memory allocation. */
+#define USBD_malloc malloc
+
+/** Alias for memory release. */
+#define USBD_free free
+
+/** Alias for memory set. */
+#define USBD_memset memset
+
+/** Alias for memory copy. */
+#define USBD_memcpy memcpy
+
+/** Alias for delay. */
+#define USBD_Delay HAL_Delay
+
+/* DEBUG macros */
+
+#if (USBD_DEBUG_LEVEL > 0)
+#define USBD_UsrLog(...) printf(__VA_ARGS__);\
+ printf("\n");
+#else
+#define USBD_UsrLog(...)
+#endif
+
+#if (USBD_DEBUG_LEVEL > 1)
+
+#define USBD_ErrLog(...) printf("ERROR: ") ;\
+ printf(__VA_ARGS__);\
+ printf("\n");
+#else
+#define USBD_ErrLog(...)
+#endif
+
+#if (USBD_DEBUG_LEVEL > 2)
+#define USBD_DbgLog(...) printf("DEBUG : ") ;\
+ printf(__VA_ARGS__);\
+ printf("\n");
+#else
+#define USBD_DbgLog(...)
+#endif
+
+/**
+ * @}
+ */
+
+/** @defgroup USBD_CONF_Exported_Types USBD_CONF_Exported_Types
+ * @brief Types.
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+/** @defgroup USBD_CONF_Exported_FunctionsPrototype USBD_CONF_Exported_FunctionsPrototype
+ * @brief Declaration of public functions for Usb device.
+ * @{
+ */
+
+/* Exported functions -------------------------------------------------------*/
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __USBD_CONF__H__ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/firmware/hw_layer/openblt/usbd_ctlreq.h b/firmware/hw_layer/openblt/usbd_ctlreq.h
new file mode 100644
index 0000000000..f973a8b1b2
--- /dev/null
+++ b/firmware/hw_layer/openblt/usbd_ctlreq.h
@@ -0,0 +1,103 @@
+/**
+ ******************************************************************************
+ * @file usbd_req.h
+ * @author MCD Application Team
+ * @brief Header file for the usbd_req.c file
+ ******************************************************************************
+ * @attention
+ *
+ * © Copyright (c) 2015 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under Ultimate Liberty license
+ * SLA0044, the "License"; You may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at:
+ * www.st.com/SLA0044
+ *
+ ******************************************************************************
+ */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __USB_REQUEST_H
+#define __USB_REQUEST_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "usbd_def.h"
+
+
+/** @addtogroup STM32_USB_DEVICE_LIBRARY
+ * @{
+ */
+
+/** @defgroup USBD_REQ
+ * @brief header file for the usbd_req.c file
+ * @{
+ */
+
+/** @defgroup USBD_REQ_Exported_Defines
+ * @{
+ */
+/**
+ * @}
+ */
+
+
+/** @defgroup USBD_REQ_Exported_Types
+ * @{
+ */
+/**
+ * @}
+ */
+
+
+
+/** @defgroup USBD_REQ_Exported_Macros
+ * @{
+ */
+/**
+ * @}
+ */
+
+/** @defgroup USBD_REQ_Exported_Variables
+ * @{
+ */
+/**
+ * @}
+ */
+
+/** @defgroup USBD_REQ_Exported_FunctionsPrototype
+ * @{
+ */
+
+USBD_StatusTypeDef USBD_StdDevReq(USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req);
+USBD_StatusTypeDef USBD_StdItfReq(USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req);
+USBD_StatusTypeDef USBD_StdEPReq(USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req);
+
+void USBD_CtlError(USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req);
+void USBD_ParseSetupRequest(USBD_SetupReqTypedef *req, uint8_t *pdata);
+void USBD_GetString(uint8_t *desc, uint8_t *unicode, uint16_t *len);
+
+/**
+ * @}
+ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __USB_REQUEST_H */
+
+/**
+ * @}
+ */
+
+/**
+* @}
+*/
+
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/firmware/hw_layer/openblt/usbd_def.h b/firmware/hw_layer/openblt/usbd_def.h
new file mode 100644
index 0000000000..0463e2f31f
--- /dev/null
+++ b/firmware/hw_layer/openblt/usbd_def.h
@@ -0,0 +1,393 @@
+/**
+ ******************************************************************************
+ * @file usbd_def.h
+ * @author MCD Application Team
+ * @brief General defines for the usb device library
+ ******************************************************************************
+ * @attention
+ *
+ * © Copyright (c) 2015 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under Ultimate Liberty license
+ * SLA0044, the "License"; You may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at:
+ * www.st.com/SLA0044
+ *
+ ******************************************************************************
+ */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __USBD_DEF_H
+#define __USBD_DEF_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "usbd_conf.h"
+
+/** @addtogroup STM32_USBD_DEVICE_LIBRARY
+ * @{
+ */
+
+/** @defgroup USB_DEF
+ * @brief general defines for the usb device library file
+ * @{
+ */
+
+/** @defgroup USB_DEF_Exported_Defines
+ * @{
+ */
+
+#ifndef NULL
+#define NULL 0U
+#endif /* NULL */
+
+#ifndef USBD_MAX_NUM_INTERFACES
+#define USBD_MAX_NUM_INTERFACES 1U
+#endif /* USBD_MAX_NUM_CONFIGURATION */
+
+#ifndef USBD_MAX_NUM_CONFIGURATION
+#define USBD_MAX_NUM_CONFIGURATION 1U
+#endif /* USBD_MAX_NUM_CONFIGURATION */
+
+#ifndef USBD_LPM_ENABLED
+#define USBD_LPM_ENABLED 0U
+#endif /* USBD_LPM_ENABLED */
+
+#ifndef USBD_SELF_POWERED
+#define USBD_SELF_POWERED 1U
+#endif /*USBD_SELF_POWERED */
+
+#ifndef USBD_SUPPORT_USER_STRING_DESC
+#define USBD_SUPPORT_USER_STRING_DESC 0U
+#endif /* USBD_SUPPORT_USER_STRING_DESC */
+
+#ifndef USBD_CLASS_USER_STRING_DESC
+#define USBD_CLASS_USER_STRING_DESC 0U
+#endif /* USBD_CLASS_USER_STRING_DESC */
+
+#define USB_LEN_DEV_QUALIFIER_DESC 0x0AU
+#define USB_LEN_DEV_DESC 0x12U
+#define USB_LEN_CFG_DESC 0x09U
+#define USB_LEN_IF_DESC 0x09U
+#define USB_LEN_EP_DESC 0x07U
+#define USB_LEN_OTG_DESC 0x03U
+#define USB_LEN_LANGID_STR_DESC 0x04U
+#define USB_LEN_OTHER_SPEED_DESC_SIZ 0x09U
+
+#define USBD_IDX_LANGID_STR 0x00U
+#define USBD_IDX_MFC_STR 0x01U
+#define USBD_IDX_PRODUCT_STR 0x02U
+#define USBD_IDX_SERIAL_STR 0x03U
+#define USBD_IDX_CONFIG_STR 0x04U
+#define USBD_IDX_INTERFACE_STR 0x05U
+
+#define USB_REQ_TYPE_STANDARD 0x00U
+#define USB_REQ_TYPE_CLASS 0x20U
+#define USB_REQ_TYPE_VENDOR 0x40U
+#define USB_REQ_TYPE_MASK 0x60U
+
+#define USB_REQ_RECIPIENT_DEVICE 0x00U
+#define USB_REQ_RECIPIENT_INTERFACE 0x01U
+#define USB_REQ_RECIPIENT_ENDPOINT 0x02U
+#define USB_REQ_RECIPIENT_MASK 0x03U
+
+#define USB_REQ_GET_STATUS 0x00U
+#define USB_REQ_CLEAR_FEATURE 0x01U
+#define USB_REQ_SET_FEATURE 0x03U
+#define USB_REQ_SET_ADDRESS 0x05U
+#define USB_REQ_GET_DESCRIPTOR 0x06U
+#define USB_REQ_SET_DESCRIPTOR 0x07U
+#define USB_REQ_GET_CONFIGURATION 0x08U
+#define USB_REQ_SET_CONFIGURATION 0x09U
+#define USB_REQ_GET_INTERFACE 0x0AU
+#define USB_REQ_SET_INTERFACE 0x0BU
+#define USB_REQ_SYNCH_FRAME 0x0CU
+
+#define USB_DESC_TYPE_DEVICE 0x01U
+#define USB_DESC_TYPE_CONFIGURATION 0x02U
+#define USB_DESC_TYPE_STRING 0x03U
+#define USB_DESC_TYPE_INTERFACE 0x04U
+#define USB_DESC_TYPE_ENDPOINT 0x05U
+#define USB_DESC_TYPE_DEVICE_QUALIFIER 0x06U
+#define USB_DESC_TYPE_OTHER_SPEED_CONFIGURATION 0x07U
+#define USB_DESC_TYPE_BOS 0x0FU
+
+#define USB_CONFIG_REMOTE_WAKEUP 0x02U
+#define USB_CONFIG_SELF_POWERED 0x01U
+
+#define USB_FEATURE_EP_HALT 0x00U
+#define USB_FEATURE_REMOTE_WAKEUP 0x01U
+#define USB_FEATURE_TEST_MODE 0x02U
+
+#define USB_DEVICE_CAPABITY_TYPE 0x10U
+
+#define USB_HS_MAX_PACKET_SIZE 512U
+#define USB_FS_MAX_PACKET_SIZE 64U
+#define USB_MAX_EP0_SIZE 64U
+
+/* Device Status */
+#define USBD_STATE_DEFAULT 0x01U
+#define USBD_STATE_ADDRESSED 0x02U
+#define USBD_STATE_CONFIGURED 0x03U
+#define USBD_STATE_SUSPENDED 0x04U
+
+
+/* EP0 State */
+#define USBD_EP0_IDLE 0x00U
+#define USBD_EP0_SETUP 0x01U
+#define USBD_EP0_DATA_IN 0x02U
+#define USBD_EP0_DATA_OUT 0x03U
+#define USBD_EP0_STATUS_IN 0x04U
+#define USBD_EP0_STATUS_OUT 0x05U
+#define USBD_EP0_STALL 0x06U
+
+#define USBD_EP_TYPE_CTRL 0x00U
+#define USBD_EP_TYPE_ISOC 0x01U
+#define USBD_EP_TYPE_BULK 0x02U
+#define USBD_EP_TYPE_INTR 0x03U
+
+
+/**
+ * @}
+ */
+
+
+/** @defgroup USBD_DEF_Exported_TypesDefinitions
+ * @{
+ */
+
+typedef struct usb_setup_req
+{
+ uint8_t bmRequest;
+ uint8_t bRequest;
+ uint16_t wValue;
+ uint16_t wIndex;
+ uint16_t wLength;
+} USBD_SetupReqTypedef;
+
+typedef struct
+{
+ uint8_t bLength;
+ uint8_t bDescriptorType;
+ uint8_t wDescriptorLengthLow;
+ uint8_t wDescriptorLengthHigh;
+ uint8_t bNumInterfaces;
+ uint8_t bConfigurationValue;
+ uint8_t iConfiguration;
+ uint8_t bmAttributes;
+ uint8_t bMaxPower;
+} USBD_ConfigDescTypedef;
+
+typedef struct
+{
+ uint8_t bLength;
+ uint8_t bDescriptorType;
+ uint16_t wTotalLength;
+ uint8_t bNumDeviceCaps;
+} USBD_BosDescTypedef;
+
+
+struct _USBD_HandleTypeDef;
+
+typedef struct _Device_cb
+{
+ uint8_t (*Init)(struct _USBD_HandleTypeDef *pdev, uint8_t cfgidx);
+ uint8_t (*DeInit)(struct _USBD_HandleTypeDef *pdev, uint8_t cfgidx);
+ /* Control Endpoints*/
+ uint8_t (*Setup)(struct _USBD_HandleTypeDef *pdev, USBD_SetupReqTypedef *req);
+ uint8_t (*EP0_TxSent)(struct _USBD_HandleTypeDef *pdev);
+ uint8_t (*EP0_RxReady)(struct _USBD_HandleTypeDef *pdev);
+ /* Class Specific Endpoints*/
+ uint8_t (*DataIn)(struct _USBD_HandleTypeDef *pdev, uint8_t epnum);
+ uint8_t (*DataOut)(struct _USBD_HandleTypeDef *pdev, uint8_t epnum);
+ uint8_t (*SOF)(struct _USBD_HandleTypeDef *pdev);
+ uint8_t (*IsoINIncomplete)(struct _USBD_HandleTypeDef *pdev, uint8_t epnum);
+ uint8_t (*IsoOUTIncomplete)(struct _USBD_HandleTypeDef *pdev, uint8_t epnum);
+
+ uint8_t *(*GetHSConfigDescriptor)(uint16_t *length);
+ uint8_t *(*GetFSConfigDescriptor)(uint16_t *length);
+ uint8_t *(*GetOtherSpeedConfigDescriptor)(uint16_t *length);
+ uint8_t *(*GetDeviceQualifierDescriptor)(uint16_t *length);
+#if (USBD_SUPPORT_USER_STRING_DESC == 1U)
+ uint8_t *(*GetUsrStrDescriptor)(struct _USBD_HandleTypeDef *pdev, uint8_t index, uint16_t *length);
+#endif
+
+} USBD_ClassTypeDef;
+
+/* Following USB Device Speed */
+typedef enum
+{
+ USBD_SPEED_HIGH = 0U,
+ USBD_SPEED_FULL = 1U,
+ USBD_SPEED_LOW = 2U,
+} USBD_SpeedTypeDef;
+
+/* Following USB Device status */
+typedef enum
+{
+ USBD_OK = 0U,
+ USBD_BUSY,
+ USBD_EMEM,
+ USBD_FAIL,
+} USBD_StatusTypeDef;
+
+/* USB Device descriptors structure */
+typedef struct
+{
+ uint8_t *(*GetDeviceDescriptor)(USBD_SpeedTypeDef speed, uint16_t *length);
+ uint8_t *(*GetLangIDStrDescriptor)(USBD_SpeedTypeDef speed, uint16_t *length);
+ uint8_t *(*GetManufacturerStrDescriptor)(USBD_SpeedTypeDef speed, uint16_t *length);
+ uint8_t *(*GetProductStrDescriptor)(USBD_SpeedTypeDef speed, uint16_t *length);
+ uint8_t *(*GetSerialStrDescriptor)(USBD_SpeedTypeDef speed, uint16_t *length);
+ uint8_t *(*GetConfigurationStrDescriptor)(USBD_SpeedTypeDef speed, uint16_t *length);
+ uint8_t *(*GetInterfaceStrDescriptor)(USBD_SpeedTypeDef speed, uint16_t *length);
+#if (USBD_CLASS_USER_STRING_DESC == 1)
+ uint8_t *(*GetUserStrDescriptor)(USBD_SpeedTypeDef speed, uint8_t idx, uint16_t *length);
+#endif
+#if ((USBD_LPM_ENABLED == 1U) || (USBD_CLASS_BOS_ENABLED == 1))
+ uint8_t *(*GetBOSDescriptor)(USBD_SpeedTypeDef speed, uint16_t *length);
+#endif
+} USBD_DescriptorsTypeDef;
+
+/* USB Device handle structure */
+typedef struct
+{
+ uint32_t status;
+ uint32_t total_length;
+ uint32_t rem_length;
+ uint32_t maxpacket;
+ uint16_t is_used;
+ uint16_t bInterval;
+} USBD_EndpointTypeDef;
+
+/* USB Device handle structure */
+typedef struct _USBD_HandleTypeDef
+{
+ uint8_t id;
+ uint32_t dev_config;
+ uint32_t dev_default_config;
+ uint32_t dev_config_status;
+ USBD_SpeedTypeDef dev_speed;
+ USBD_EndpointTypeDef ep_in[16];
+ USBD_EndpointTypeDef ep_out[16];
+ uint32_t ep0_state;
+ uint32_t ep0_data_len;
+ uint8_t dev_state;
+ uint8_t dev_old_state;
+ uint8_t dev_address;
+ uint8_t dev_connection_status;
+ uint8_t dev_test_mode;
+ uint32_t dev_remote_wakeup;
+ uint8_t ConfIdx;
+
+ USBD_SetupReqTypedef request;
+ USBD_DescriptorsTypeDef *pDesc;
+ USBD_ClassTypeDef *pClass;
+ void *pClassData;
+ void *pUserData;
+ void *pData;
+ void *pBosDesc;
+ void *pConfDesc;
+} USBD_HandleTypeDef;
+
+/**
+ * @}
+ */
+
+
+
+/** @defgroup USBD_DEF_Exported_Macros
+ * @{
+ */
+__STATIC_INLINE uint16_t SWAPBYTE(uint8_t *addr)
+{
+ uint16_t _SwapVal, _Byte1, _Byte2;
+ uint8_t *_pbuff = addr;
+
+ _Byte1 = *(uint8_t *)_pbuff;
+ _pbuff++;
+ _Byte2 = *(uint8_t *)_pbuff;
+
+ _SwapVal = (_Byte2 << 8) | _Byte1;
+
+ return _SwapVal;
+}
+
+#define LOBYTE(x) ((uint8_t)((x) & 0x00FFU))
+#define HIBYTE(x) ((uint8_t)(((x) & 0xFF00U) >> 8U))
+#define MIN(a, b) (((a) < (b)) ? (a) : (b))
+#define MAX(a, b) (((a) > (b)) ? (a) : (b))
+
+
+#if defined ( __GNUC__ )
+#ifndef __weak
+#define __weak __attribute__((weak))
+#endif /* __weak */
+#ifndef __packed
+#define __packed __attribute__((__packed__))
+#endif /* __packed */
+#endif /* __GNUC__ */
+
+
+/* In HS mode and when the DMA is used, all variables and data structures dealing
+ with the DMA during the transaction process should be 4-bytes aligned */
+
+#if defined ( __GNUC__ ) && !defined (__CC_ARM) /* GNU Compiler */
+#ifndef __ALIGN_END
+#define __ALIGN_END __attribute__ ((aligned (4U)))
+#endif /* __ALIGN_END */
+#ifndef __ALIGN_BEGIN
+#define __ALIGN_BEGIN
+#endif /* __ALIGN_BEGIN */
+#else
+#ifndef __ALIGN_END
+#define __ALIGN_END
+#endif /* __ALIGN_END */
+#ifndef __ALIGN_BEGIN
+#if defined (__CC_ARM) /* ARM Compiler */
+#define __ALIGN_BEGIN __align(4U)
+#elif defined (__ICCARM__) /* IAR Compiler */
+#define __ALIGN_BEGIN
+#endif /* __CC_ARM */
+#endif /* __ALIGN_BEGIN */
+#endif /* __GNUC__ */
+
+
+/**
+ * @}
+ */
+
+/** @defgroup USBD_DEF_Exported_Variables
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+/** @defgroup USBD_DEF_Exported_FunctionsPrototype
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __USBD_DEF_H */
+
+/**
+ * @}
+ */
+
+/**
+* @}
+*/
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/firmware/hw_layer/openblt/usbd_desc.h b/firmware/hw_layer/openblt/usbd_desc.h
new file mode 100644
index 0000000000..8d75caa30f
--- /dev/null
+++ b/firmware/hw_layer/openblt/usbd_desc.h
@@ -0,0 +1,145 @@
+/* USER CODE BEGIN Header */
+/**
+ ******************************************************************************
+ * @file : usbd_desc.h
+ * @version : v1.0_Cube
+ * @brief : Header for usbd_conf.c file.
+ ******************************************************************************
+ * @attention
+ *
+ * © Copyright (c) 2021 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under Ultimate Liberty license
+ * SLA0044, the "License"; You may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at:
+ * www.st.com/SLA0044
+ *
+ ******************************************************************************
+ */
+/* USER CODE END Header */
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __USBD_DESC__H__
+#define __USBD_DESC__H__
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "usbd_def.h"
+
+/* USER CODE BEGIN INCLUDE */
+
+/* USER CODE END INCLUDE */
+
+/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
+ * @{
+ */
+
+/** @defgroup USBD_DESC USBD_DESC
+ * @brief Usb device descriptors module.
+ * @{
+ */
+
+/** @defgroup USBD_DESC_Exported_Constants USBD_DESC_Exported_Constants
+ * @brief Constants.
+ * @{
+ */
+#define DEVICE_ID1 (UID_BASE)
+#define DEVICE_ID2 (UID_BASE + 0x4)
+#define DEVICE_ID3 (UID_BASE + 0x8)
+
+#define USB_SIZ_STRING_SERIAL 0x1A
+
+/* USER CODE BEGIN EXPORTED_CONSTANTS */
+
+/* USER CODE END EXPORTED_CONSTANTS */
+
+/**
+ * @}
+ */
+
+/** @defgroup USBD_DESC_Exported_Defines USBD_DESC_Exported_Defines
+ * @brief Defines.
+ * @{
+ */
+
+/* USER CODE BEGIN EXPORTED_DEFINES */
+
+/* USER CODE END EXPORTED_DEFINES */
+
+/**
+ * @}
+ */
+
+/** @defgroup USBD_DESC_Exported_TypesDefinitions USBD_DESC_Exported_TypesDefinitions
+ * @brief Types.
+ * @{
+ */
+
+/* USER CODE BEGIN EXPORTED_TYPES */
+
+/* USER CODE END EXPORTED_TYPES */
+
+/**
+ * @}
+ */
+
+/** @defgroup USBD_DESC_Exported_Macros USBD_DESC_Exported_Macros
+ * @brief Aliases.
+ * @{
+ */
+
+/* USER CODE BEGIN EXPORTED_MACRO */
+
+/* USER CODE END EXPORTED_MACRO */
+
+/**
+ * @}
+ */
+
+/** @defgroup USBD_DESC_Exported_Variables USBD_DESC_Exported_Variables
+ * @brief Public variables.
+ * @{
+ */
+
+/** Descriptor for the Usb device. */
+extern USBD_DescriptorsTypeDef FS_Desc;
+
+/* USER CODE BEGIN EXPORTED_VARIABLES */
+
+/* USER CODE END EXPORTED_VARIABLES */
+
+/**
+ * @}
+ */
+
+/** @defgroup USBD_DESC_Exported_FunctionsPrototype USBD_DESC_Exported_FunctionsPrototype
+ * @brief Public functions declaration.
+ * @{
+ */
+
+/* USER CODE BEGIN EXPORTED_FUNCTIONS */
+
+/* USER CODE END EXPORTED_FUNCTIONS */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+/**
+ * @}
+ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __USBD_DESC__H__ */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
diff --git a/firmware/hw_layer/openblt/usbd_ioreq.h b/firmware/hw_layer/openblt/usbd_ioreq.h
new file mode 100644
index 0000000000..b7159d53b6
--- /dev/null
+++ b/firmware/hw_layer/openblt/usbd_ioreq.h
@@ -0,0 +1,114 @@
+/**
+ ******************************************************************************
+ * @file usbd_ioreq.h
+ * @author MCD Application Team
+ * @brief Header file for the usbd_ioreq.c file
+ ******************************************************************************
+ * @attention
+ *
+ * © Copyright (c) 2015 STMicroelectronics.
+ * All rights reserved.
+ *
+ * This software component is licensed by ST under Ultimate Liberty license
+ * SLA0044, the "License"; You may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at:
+ * www.st.com/SLA0044
+ *
+ ******************************************************************************
+ */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __USBD_IOREQ_H
+#define __USBD_IOREQ_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "usbd_def.h"
+#include "usbd_core.h"
+
+/** @addtogroup STM32_USB_DEVICE_LIBRARY
+ * @{
+ */
+
+/** @defgroup USBD_IOREQ
+ * @brief header file for the usbd_ioreq.c file
+ * @{
+ */
+
+/** @defgroup USBD_IOREQ_Exported_Defines
+ * @{
+ */
+/**
+ * @}
+ */
+
+
+/** @defgroup USBD_IOREQ_Exported_Types
+ * @{
+ */
+
+
+/**
+ * @}
+ */
+
+
+
+/** @defgroup USBD_IOREQ_Exported_Macros
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+/** @defgroup USBD_IOREQ_Exported_Variables
+ * @{
+ */
+
+/**
+ * @}
+ */
+
+/** @defgroup USBD_IOREQ_Exported_FunctionsPrototype
+ * @{
+ */
+
+USBD_StatusTypeDef USBD_CtlSendData(USBD_HandleTypeDef *pdev,
+ uint8_t *pbuf, uint32_t len);
+
+USBD_StatusTypeDef USBD_CtlContinueSendData(USBD_HandleTypeDef *pdev,
+ uint8_t *pbuf, uint32_t len);
+
+USBD_StatusTypeDef USBD_CtlPrepareRx(USBD_HandleTypeDef *pdev,
+ uint8_t *pbuf, uint32_t len);
+
+USBD_StatusTypeDef USBD_CtlContinueRx(USBD_HandleTypeDef *pdev,
+ uint8_t *pbuf, uint32_t len);
+
+USBD_StatusTypeDef USBD_CtlSendStatus(USBD_HandleTypeDef *pdev);
+USBD_StatusTypeDef USBD_CtlReceiveStatus(USBD_HandleTypeDef *pdev);
+
+uint32_t USBD_GetRxCount(USBD_HandleTypeDef *pdev, uint8_t ep_addr);
+
+/**
+ * @}
+ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __USBD_IOREQ_H */
+
+/**
+ * @}
+ */
+
+/**
+* @}
+*/
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/