mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-25 07:48:10 +00:00
783 lines
16 KiB
C
783 lines
16 KiB
C
/**
|
|
******************************************************************************
|
|
* @file usbd_req.c
|
|
* @author MCD Application Team
|
|
* @version V2.4.2
|
|
* @date 11-December-2015
|
|
* @brief This file provides the standard USB requests following chapter 9.
|
|
******************************************************************************
|
|
* @attention
|
|
*
|
|
* <h2><center>© COPYRIGHT 2015 STMicroelectronics</center></h2>
|
|
*
|
|
* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
|
|
* You may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at:
|
|
*
|
|
* http://www.st.com/software_license_agreement_liberty_v2
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*
|
|
******************************************************************************
|
|
*/
|
|
|
|
/* Includes ------------------------------------------------------------------*/
|
|
#include "usbd_ctlreq.h"
|
|
#include "usbd_ioreq.h"
|
|
|
|
|
|
/** @addtogroup STM32_USBD_STATE_DEVICE_LIBRARY
|
|
* @{
|
|
*/
|
|
|
|
|
|
/** @defgroup USBD_REQ
|
|
* @brief USB standard requests module
|
|
* @{
|
|
*/
|
|
|
|
/** @defgroup USBD_REQ_Private_TypesDefinitions
|
|
* @{
|
|
*/
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
|
|
/** @defgroup USBD_REQ_Private_Defines
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
|
|
/** @defgroup USBD_REQ_Private_Macros
|
|
* @{
|
|
*/
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
|
|
/** @defgroup USBD_REQ_Private_Variables
|
|
* @{
|
|
*/
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
|
|
/** @defgroup USBD_REQ_Private_FunctionPrototypes
|
|
* @{
|
|
*/
|
|
static void USBD_GetDescriptor(USBD_HandleTypeDef *pdev ,
|
|
USBD_SetupReqTypedef *req);
|
|
|
|
static void USBD_SetAddress(USBD_HandleTypeDef *pdev ,
|
|
USBD_SetupReqTypedef *req);
|
|
|
|
static void USBD_SetConfig(USBD_HandleTypeDef *pdev ,
|
|
USBD_SetupReqTypedef *req);
|
|
|
|
static void USBD_GetConfig(USBD_HandleTypeDef *pdev ,
|
|
USBD_SetupReqTypedef *req);
|
|
|
|
static void USBD_GetStatus(USBD_HandleTypeDef *pdev ,
|
|
USBD_SetupReqTypedef *req);
|
|
|
|
static void USBD_SetFeature(USBD_HandleTypeDef *pdev ,
|
|
USBD_SetupReqTypedef *req);
|
|
|
|
static void USBD_ClrFeature(USBD_HandleTypeDef *pdev ,
|
|
USBD_SetupReqTypedef *req);
|
|
|
|
static uint8_t USBD_GetLen(uint8_t *buf);
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
|
|
/** @defgroup USBD_REQ_Private_Functions
|
|
* @{
|
|
*/
|
|
|
|
|
|
/**
|
|
* @brief USBD_StdDevReq
|
|
* Handle standard usb device requests
|
|
* @param pdev: device instance
|
|
* @param req: usb request
|
|
* @retval status
|
|
*/
|
|
USBD_StatusTypeDef USBD_StdDevReq (USBD_HandleTypeDef *pdev , USBD_SetupReqTypedef *req)
|
|
{
|
|
USBD_StatusTypeDef ret = USBD_OK;
|
|
|
|
switch (req->bRequest)
|
|
{
|
|
case USB_REQ_GET_DESCRIPTOR:
|
|
|
|
USBD_GetDescriptor (pdev, req) ;
|
|
break;
|
|
|
|
case USB_REQ_SET_ADDRESS:
|
|
USBD_SetAddress(pdev, req);
|
|
break;
|
|
|
|
case USB_REQ_SET_CONFIGURATION:
|
|
USBD_SetConfig (pdev , req);
|
|
break;
|
|
|
|
case USB_REQ_GET_CONFIGURATION:
|
|
USBD_GetConfig (pdev , req);
|
|
break;
|
|
|
|
case USB_REQ_GET_STATUS:
|
|
USBD_GetStatus (pdev , req);
|
|
break;
|
|
|
|
|
|
case USB_REQ_SET_FEATURE:
|
|
USBD_SetFeature (pdev , req);
|
|
break;
|
|
|
|
case USB_REQ_CLEAR_FEATURE:
|
|
USBD_ClrFeature (pdev , req);
|
|
break;
|
|
|
|
default:
|
|
USBD_CtlError(pdev , req);
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* @brief USBD_StdItfReq
|
|
* Handle standard usb interface requests
|
|
* @param pdev: device instance
|
|
* @param req: usb request
|
|
* @retval status
|
|
*/
|
|
USBD_StatusTypeDef USBD_StdItfReq (USBD_HandleTypeDef *pdev , USBD_SetupReqTypedef *req)
|
|
{
|
|
USBD_StatusTypeDef ret = USBD_OK;
|
|
|
|
switch (pdev->dev_state)
|
|
{
|
|
case USBD_STATE_CONFIGURED:
|
|
|
|
if (LOBYTE(req->wIndex) <= USBD_MAX_NUM_INTERFACES)
|
|
{
|
|
pdev->pClass->Setup (pdev, req);
|
|
|
|
if((req->wLength == 0)&& (ret == USBD_OK))
|
|
{
|
|
USBD_CtlSendStatus(pdev);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
USBD_CtlError(pdev , req);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
USBD_CtlError(pdev , req);
|
|
break;
|
|
}
|
|
return USBD_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief USBD_StdEPReq
|
|
* Handle standard usb endpoint requests
|
|
* @param pdev: device instance
|
|
* @param req: usb request
|
|
* @retval status
|
|
*/
|
|
USBD_StatusTypeDef USBD_StdEPReq (USBD_HandleTypeDef *pdev , USBD_SetupReqTypedef *req)
|
|
{
|
|
|
|
uint8_t ep_addr;
|
|
USBD_StatusTypeDef ret = USBD_OK;
|
|
USBD_EndpointTypeDef *pep;
|
|
ep_addr = LOBYTE(req->wIndex);
|
|
|
|
/* Check if it is a class request */
|
|
if ((req->bmRequest & 0x60) == 0x20)
|
|
{
|
|
pdev->pClass->Setup (pdev, req);
|
|
|
|
return USBD_OK;
|
|
}
|
|
|
|
switch (req->bRequest)
|
|
{
|
|
|
|
case USB_REQ_SET_FEATURE :
|
|
|
|
switch (pdev->dev_state)
|
|
{
|
|
case USBD_STATE_ADDRESSED:
|
|
if ((ep_addr != 0x00) && (ep_addr != 0x80))
|
|
{
|
|
USBD_LL_StallEP(pdev , ep_addr);
|
|
}
|
|
break;
|
|
|
|
case USBD_STATE_CONFIGURED:
|
|
if (req->wValue == USB_FEATURE_EP_HALT)
|
|
{
|
|
if ((ep_addr != 0x00) && (ep_addr != 0x80))
|
|
{
|
|
USBD_LL_StallEP(pdev , ep_addr);
|
|
|
|
}
|
|
}
|
|
pdev->pClass->Setup (pdev, req);
|
|
USBD_CtlSendStatus(pdev);
|
|
|
|
break;
|
|
|
|
default:
|
|
USBD_CtlError(pdev , req);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case USB_REQ_CLEAR_FEATURE :
|
|
|
|
switch (pdev->dev_state)
|
|
{
|
|
case USBD_STATE_ADDRESSED:
|
|
if ((ep_addr != 0x00) && (ep_addr != 0x80))
|
|
{
|
|
USBD_LL_StallEP(pdev , ep_addr);
|
|
}
|
|
break;
|
|
|
|
case USBD_STATE_CONFIGURED:
|
|
if (req->wValue == USB_FEATURE_EP_HALT)
|
|
{
|
|
if ((ep_addr & 0x7F) != 0x00)
|
|
{
|
|
USBD_LL_ClearStallEP(pdev , ep_addr);
|
|
pdev->pClass->Setup (pdev, req);
|
|
}
|
|
USBD_CtlSendStatus(pdev);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
USBD_CtlError(pdev , req);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case USB_REQ_GET_STATUS:
|
|
switch (pdev->dev_state)
|
|
{
|
|
case USBD_STATE_ADDRESSED:
|
|
if ((ep_addr & 0x7F) != 0x00)
|
|
{
|
|
USBD_LL_StallEP(pdev , ep_addr);
|
|
}
|
|
break;
|
|
|
|
case USBD_STATE_CONFIGURED:
|
|
pep = ((ep_addr & 0x80) == 0x80) ? &pdev->ep_in[ep_addr & 0x7F]:\
|
|
&pdev->ep_out[ep_addr & 0x7F];
|
|
if(USBD_LL_IsStallEP(pdev, ep_addr))
|
|
{
|
|
pep->status = 0x0001;
|
|
}
|
|
else
|
|
{
|
|
pep->status = 0x0000;
|
|
}
|
|
|
|
USBD_CtlSendData (pdev,
|
|
(uint8_t *)&pep->status,
|
|
2);
|
|
break;
|
|
|
|
default:
|
|
USBD_CtlError(pdev , req);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
/**
|
|
* @brief USBD_GetDescriptor
|
|
* Handle Get Descriptor requests
|
|
* @param pdev: device instance
|
|
* @param req: usb request
|
|
* @retval status
|
|
*/
|
|
static void USBD_GetDescriptor(USBD_HandleTypeDef *pdev ,
|
|
USBD_SetupReqTypedef *req)
|
|
{
|
|
uint16_t len;
|
|
uint8_t *pbuf;
|
|
|
|
|
|
switch (req->wValue >> 8)
|
|
{
|
|
#if (USBD_LPM_ENABLED == 1)
|
|
case USB_DESC_TYPE_BOS:
|
|
pbuf = pdev->pDesc->GetBOSDescriptor(pdev->dev_speed, &len);
|
|
break;
|
|
#endif
|
|
case USB_DESC_TYPE_DEVICE:
|
|
pbuf = pdev->pDesc->GetDeviceDescriptor(pdev->dev_speed, &len);
|
|
break;
|
|
|
|
case USB_DESC_TYPE_CONFIGURATION:
|
|
if(pdev->dev_speed == USBD_SPEED_HIGH )
|
|
{
|
|
pbuf = (uint8_t *)pdev->pClass->GetHSConfigDescriptor(&len);
|
|
pbuf[1] = USB_DESC_TYPE_CONFIGURATION;
|
|
}
|
|
else
|
|
{
|
|
pbuf = (uint8_t *)pdev->pClass->GetFSConfigDescriptor(&len);
|
|
pbuf[1] = USB_DESC_TYPE_CONFIGURATION;
|
|
}
|
|
break;
|
|
|
|
case USB_DESC_TYPE_STRING:
|
|
switch ((uint8_t)(req->wValue))
|
|
{
|
|
case USBD_IDX_LANGID_STR:
|
|
pbuf = pdev->pDesc->GetLangIDStrDescriptor(pdev->dev_speed, &len);
|
|
break;
|
|
|
|
case USBD_IDX_MFC_STR:
|
|
pbuf = pdev->pDesc->GetManufacturerStrDescriptor(pdev->dev_speed, &len);
|
|
break;
|
|
|
|
case USBD_IDX_PRODUCT_STR:
|
|
pbuf = pdev->pDesc->GetProductStrDescriptor(pdev->dev_speed, &len);
|
|
break;
|
|
|
|
case USBD_IDX_SERIAL_STR:
|
|
pbuf = pdev->pDesc->GetSerialStrDescriptor(pdev->dev_speed, &len);
|
|
break;
|
|
|
|
case USBD_IDX_CONFIG_STR:
|
|
pbuf = pdev->pDesc->GetConfigurationStrDescriptor(pdev->dev_speed, &len);
|
|
break;
|
|
|
|
case USBD_IDX_INTERFACE_STR:
|
|
pbuf = pdev->pDesc->GetInterfaceStrDescriptor(pdev->dev_speed, &len);
|
|
break;
|
|
|
|
default:
|
|
#if (USBD_SUPPORT_USER_STRING == 1)
|
|
pbuf = pdev->pClass->GetUsrStrDescriptor(pdev, (req->wValue) , &len);
|
|
break;
|
|
#else
|
|
USBD_CtlError(pdev , req);
|
|
return;
|
|
#endif
|
|
}
|
|
break;
|
|
case USB_DESC_TYPE_DEVICE_QUALIFIER:
|
|
|
|
if(pdev->dev_speed == USBD_SPEED_HIGH )
|
|
{
|
|
pbuf = (uint8_t *)pdev->pClass->GetDeviceQualifierDescriptor(&len);
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
USBD_CtlError(pdev , req);
|
|
return;
|
|
}
|
|
|
|
case USB_DESC_TYPE_OTHER_SPEED_CONFIGURATION:
|
|
if(pdev->dev_speed == USBD_SPEED_HIGH )
|
|
{
|
|
pbuf = (uint8_t *)pdev->pClass->GetOtherSpeedConfigDescriptor(&len);
|
|
pbuf[1] = USB_DESC_TYPE_OTHER_SPEED_CONFIGURATION;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
USBD_CtlError(pdev , req);
|
|
return;
|
|
}
|
|
|
|
default:
|
|
USBD_CtlError(pdev , req);
|
|
return;
|
|
}
|
|
|
|
if((len != 0)&& (req->wLength != 0))
|
|
{
|
|
|
|
len = MIN(len , req->wLength);
|
|
|
|
USBD_CtlSendData (pdev,
|
|
pbuf,
|
|
len);
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* @brief USBD_SetAddress
|
|
* Set device address
|
|
* @param pdev: device instance
|
|
* @param req: usb request
|
|
* @retval status
|
|
*/
|
|
static void USBD_SetAddress(USBD_HandleTypeDef *pdev ,
|
|
USBD_SetupReqTypedef *req)
|
|
{
|
|
uint8_t dev_addr;
|
|
|
|
if ((req->wIndex == 0) && (req->wLength == 0))
|
|
{
|
|
dev_addr = (uint8_t)(req->wValue) & 0x7F;
|
|
|
|
if (pdev->dev_state == USBD_STATE_CONFIGURED)
|
|
{
|
|
USBD_CtlError(pdev , req);
|
|
}
|
|
else
|
|
{
|
|
pdev->dev_address = dev_addr;
|
|
USBD_LL_SetUSBAddress(pdev, dev_addr);
|
|
USBD_CtlSendStatus(pdev);
|
|
|
|
if (dev_addr != 0)
|
|
{
|
|
pdev->dev_state = USBD_STATE_ADDRESSED;
|
|
}
|
|
else
|
|
{
|
|
pdev->dev_state = USBD_STATE_DEFAULT;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
USBD_CtlError(pdev , req);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief USBD_SetConfig
|
|
* Handle Set device configuration request
|
|
* @param pdev: device instance
|
|
* @param req: usb request
|
|
* @retval status
|
|
*/
|
|
static void USBD_SetConfig(USBD_HandleTypeDef *pdev ,
|
|
USBD_SetupReqTypedef *req)
|
|
{
|
|
|
|
static uint8_t cfgidx;
|
|
|
|
cfgidx = (uint8_t)(req->wValue);
|
|
|
|
if (cfgidx > USBD_MAX_NUM_CONFIGURATION )
|
|
{
|
|
USBD_CtlError(pdev , req);
|
|
}
|
|
else
|
|
{
|
|
switch (pdev->dev_state)
|
|
{
|
|
case USBD_STATE_ADDRESSED:
|
|
if (cfgidx)
|
|
{
|
|
pdev->dev_config = cfgidx;
|
|
pdev->dev_state = USBD_STATE_CONFIGURED;
|
|
if(USBD_SetClassConfig(pdev , cfgidx) == USBD_FAIL)
|
|
{
|
|
USBD_CtlError(pdev , req);
|
|
return;
|
|
}
|
|
USBD_CtlSendStatus(pdev);
|
|
}
|
|
else
|
|
{
|
|
USBD_CtlSendStatus(pdev);
|
|
}
|
|
break;
|
|
|
|
case USBD_STATE_CONFIGURED:
|
|
if (cfgidx == 0)
|
|
{
|
|
pdev->dev_state = USBD_STATE_ADDRESSED;
|
|
pdev->dev_config = cfgidx;
|
|
USBD_ClrClassConfig(pdev , cfgidx);
|
|
USBD_CtlSendStatus(pdev);
|
|
|
|
}
|
|
else if (cfgidx != pdev->dev_config)
|
|
{
|
|
/* Clear old configuration */
|
|
USBD_ClrClassConfig(pdev , pdev->dev_config);
|
|
|
|
/* set new configuration */
|
|
pdev->dev_config = cfgidx;
|
|
if(USBD_SetClassConfig(pdev , cfgidx) == USBD_FAIL)
|
|
{
|
|
USBD_CtlError(pdev , req);
|
|
return;
|
|
}
|
|
USBD_CtlSendStatus(pdev);
|
|
}
|
|
else
|
|
{
|
|
USBD_CtlSendStatus(pdev);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
USBD_CtlError(pdev , req);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief USBD_GetConfig
|
|
* Handle Get device configuration request
|
|
* @param pdev: device instance
|
|
* @param req: usb request
|
|
* @retval status
|
|
*/
|
|
static void USBD_GetConfig(USBD_HandleTypeDef *pdev ,
|
|
USBD_SetupReqTypedef *req)
|
|
{
|
|
|
|
if (req->wLength != 1)
|
|
{
|
|
USBD_CtlError(pdev , req);
|
|
}
|
|
else
|
|
{
|
|
switch (pdev->dev_state )
|
|
{
|
|
case USBD_STATE_ADDRESSED:
|
|
pdev->dev_default_config = 0;
|
|
USBD_CtlSendData (pdev,
|
|
(uint8_t *)&pdev->dev_default_config,
|
|
1);
|
|
break;
|
|
|
|
case USBD_STATE_CONFIGURED:
|
|
|
|
USBD_CtlSendData (pdev,
|
|
(uint8_t *)&pdev->dev_config,
|
|
1);
|
|
break;
|
|
|
|
default:
|
|
USBD_CtlError(pdev , req);
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief USBD_GetStatus
|
|
* Handle Get Status request
|
|
* @param pdev: device instance
|
|
* @param req: usb request
|
|
* @retval status
|
|
*/
|
|
static void USBD_GetStatus(USBD_HandleTypeDef *pdev ,
|
|
USBD_SetupReqTypedef *req)
|
|
{
|
|
|
|
|
|
switch (pdev->dev_state)
|
|
{
|
|
case USBD_STATE_ADDRESSED:
|
|
case USBD_STATE_CONFIGURED:
|
|
|
|
#if ( USBD_SELF_POWERED == 1)
|
|
pdev->dev_config_status = USB_CONFIG_SELF_POWERED;
|
|
#else
|
|
pdev->dev_config_status = 0;
|
|
#endif
|
|
|
|
if (pdev->dev_remote_wakeup)
|
|
{
|
|
pdev->dev_config_status |= USB_CONFIG_REMOTE_WAKEUP;
|
|
}
|
|
|
|
USBD_CtlSendData (pdev,
|
|
(uint8_t *)& pdev->dev_config_status,
|
|
2);
|
|
break;
|
|
|
|
default :
|
|
USBD_CtlError(pdev , req);
|
|
break;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief USBD_SetFeature
|
|
* Handle Set device feature request
|
|
* @param pdev: device instance
|
|
* @param req: usb request
|
|
* @retval status
|
|
*/
|
|
static void USBD_SetFeature(USBD_HandleTypeDef *pdev ,
|
|
USBD_SetupReqTypedef *req)
|
|
{
|
|
|
|
if (req->wValue == USB_FEATURE_REMOTE_WAKEUP)
|
|
{
|
|
pdev->dev_remote_wakeup = 1;
|
|
pdev->pClass->Setup (pdev, req);
|
|
USBD_CtlSendStatus(pdev);
|
|
}
|
|
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief USBD_ClrFeature
|
|
* Handle clear device feature request
|
|
* @param pdev: device instance
|
|
* @param req: usb request
|
|
* @retval status
|
|
*/
|
|
static void USBD_ClrFeature(USBD_HandleTypeDef *pdev ,
|
|
USBD_SetupReqTypedef *req)
|
|
{
|
|
switch (pdev->dev_state)
|
|
{
|
|
case USBD_STATE_ADDRESSED:
|
|
case USBD_STATE_CONFIGURED:
|
|
if (req->wValue == USB_FEATURE_REMOTE_WAKEUP)
|
|
{
|
|
pdev->dev_remote_wakeup = 0;
|
|
pdev->pClass->Setup (pdev, req);
|
|
USBD_CtlSendStatus(pdev);
|
|
}
|
|
break;
|
|
|
|
default :
|
|
USBD_CtlError(pdev , req);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief USBD_ParseSetupRequest
|
|
* Copy buffer into setup structure
|
|
* @param pdev: device instance
|
|
* @param req: usb request
|
|
* @retval None
|
|
*/
|
|
|
|
void USBD_ParseSetupRequest(USBD_SetupReqTypedef *req, uint8_t *pdata)
|
|
{
|
|
req->bmRequest = *(uint8_t *) (pdata);
|
|
req->bRequest = *(uint8_t *) (pdata + 1);
|
|
req->wValue = SWAPBYTE (pdata + 2);
|
|
req->wIndex = SWAPBYTE (pdata + 4);
|
|
req->wLength = SWAPBYTE (pdata + 6);
|
|
|
|
}
|
|
|
|
/**
|
|
* @brief USBD_CtlError
|
|
* Handle USB low level Error
|
|
* @param pdev: device instance
|
|
* @param req: usb request
|
|
* @retval None
|
|
*/
|
|
|
|
void USBD_CtlError( USBD_HandleTypeDef *pdev ,
|
|
USBD_SetupReqTypedef *req)
|
|
{
|
|
USBD_LL_StallEP(pdev , 0x80);
|
|
USBD_LL_StallEP(pdev , 0);
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief USBD_GetString
|
|
* Convert Ascii string into unicode one
|
|
* @param desc : descriptor buffer
|
|
* @param unicode : Formatted string buffer (unicode)
|
|
* @param len : descriptor length
|
|
* @retval None
|
|
*/
|
|
void USBD_GetString(uint8_t *desc, uint8_t *unicode, uint16_t *len)
|
|
{
|
|
uint8_t idx = 0;
|
|
|
|
if (desc != NULL)
|
|
{
|
|
*len = USBD_GetLen(desc) * 2 + 2;
|
|
unicode[idx++] = *len;
|
|
unicode[idx++] = USB_DESC_TYPE_STRING;
|
|
|
|
while (*desc != '\0')
|
|
{
|
|
unicode[idx++] = *desc++;
|
|
unicode[idx++] = 0x00;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief USBD_GetLen
|
|
* return the string length
|
|
* @param buf : pointer to the ascii string buffer
|
|
* @retval string length
|
|
*/
|
|
static uint8_t USBD_GetLen(uint8_t *buf)
|
|
{
|
|
uint8_t len = 0;
|
|
|
|
while (*buf != '\0')
|
|
{
|
|
len++;
|
|
buf++;
|
|
}
|
|
|
|
return len;
|
|
}
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|