USBH_MSC_CORE_Exported_FunctionsPrototype

Collaboration diagram for USBH_MSC_CORE_Exported_FunctionsPrototype:

Functions
uint8_t	USBH_MSC_IsReady (USBH_HandleTypeDef *phost)
	USBH_MSC_IsReady The function check if the MSC function is ready. More...
int8_t	USBH_MSC_GetMaxLUN (USBH_HandleTypeDef *phost)
	USBH_MSC_GetMaxLUN The function return the Max LUN supported. More...
uint8_t	USBH_MSC_UnitIsReady (USBH_HandleTypeDef *phost, uint8_t lun)
	USBH_MSC_UnitIsReady The function check whether a LUN is ready. More...
USBH_StatusTypeDef	USBH_MSC_GetLUNInfo (USBH_HandleTypeDef *phost, uint8_t lun, MSC_LUNTypeDef *info)
	USBH_MSC_GetLUNInfo The function return a LUN information. More...
USBH_StatusTypeDef	USBH_MSC_Read (USBH_HandleTypeDef *phost, uint8_t lun, uint32_t address, uint8_t *pbuf, uint32_t length)
	USBH_MSC_Read The function performs a Read operation. More...
USBH_StatusTypeDef	USBH_MSC_Write (USBH_HandleTypeDef *phost, uint8_t lun, uint32_t address, uint8_t *pbuf, uint32_t length)
	USBH_MSC_Write The function performs a Write operation. More...

Detailed Description

Function Documentation

USBH_MSC_IsReady()

uint8_t USBH_MSC_IsReady

(

USBH_HandleTypeDef *

phost

)

USBH_MSC_IsReady The function check if the MSC function is ready.

Parameters

phost

Host handle

Return values

USBH

Status

{
    MSC_HandleTypeDef *MSC_Handle =  (MSC_HandleTypeDef *) phost->pActiveClass->pData;
 
  if(phost->gState == HOST_CLASS)
  {
    return (MSC_Handle->state == MSC_IDLE);
  }
  else
  {
    return 0;
  }
}

USBH_MSC_GetMaxLUN()

int8_t USBH_MSC_GetMaxLUN

(

USBH_HandleTypeDef *

phost

)

USBH_MSC_GetMaxLUN The function return the Max LUN supported.

Parameters

phost

Host handle

Return values

logical

Unit Number supported

{
  MSC_HandleTypeDef *MSC_Handle =  (MSC_HandleTypeDef *) phost->pActiveClass->pData;
 
  if ((phost->gState == HOST_CLASS) && (MSC_Handle->state == MSC_IDLE))
  {
    return  MSC_Handle->max_lun;
  }
  return 0xFF;
}

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USBH_MSC_UnitIsReady()

uint8_t USBH_MSC_UnitIsReady	(	USBH_HandleTypeDef *	phost,
		uint8_t	lun
	)

USBH_MSC_UnitIsReady The function check whether a LUN is ready.

Parameters

phost	Host handle
lun	logical Unit Number

Return values

Lun	status (0: not ready / 1: ready)

{
  MSC_HandleTypeDef *MSC_Handle =  (MSC_HandleTypeDef *) phost->pActiveClass->pData;
 
  if(phost->gState == HOST_CLASS)
  {
    return (MSC_Handle->unit[lun].error == MSC_OK);
  }
  else
  {
    return 0;
  }
}

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USBH_MSC_GetLUNInfo()

USBH_StatusTypeDef USBH_MSC_GetLUNInfo	(	USBH_HandleTypeDef *	phost,
		uint8_t	lun,
		MSC_LUNTypeDef *	info
	)

USBH_MSC_GetLUNInfo The function return a LUN information.

Parameters

phost	Host handle
lun	logical Unit Number

Return values

USBH

Status

{
  MSC_HandleTypeDef *MSC_Handle =  (MSC_HandleTypeDef *) phost->pActiveClass->pData;
  if(phost->gState == HOST_CLASS)
  {
    USBH_memcpy(info,&MSC_Handle->unit[lun], sizeof(MSC_LUNTypeDef));
    return USBH_OK;
  }
  else
  {
    return USBH_FAIL;
  }
}

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USBH_MSC_Read()

USBH_StatusTypeDef USBH_MSC_Read	(	USBH_HandleTypeDef *	phost,
		uint8_t	lun,
		uint32_t	address,
		uint8_t *	pbuf,
		uint32_t	length
	)

USBH_MSC_Read The function performs a Read operation.

Parameters

phost	Host handle
lun	logical Unit Number
address	sector address
pbuf	pointer to data
length	number of sector to read

Return values

USBH

Status

{
  uint32_t timeout;
  MSC_HandleTypeDef *MSC_Handle =  (MSC_HandleTypeDef *) phost->pActiveClass->pData;
 
  if ((phost->device.is_connected == 0) ||
      (phost->gState != HOST_CLASS) ||
      (MSC_Handle->unit[lun].state != MSC_IDLE))
  {
    return  USBH_FAIL;
  }
  MSC_Handle->state = MSC_READ;
  MSC_Handle->unit[lun].state = MSC_READ;
  MSC_Handle->rw_lun = lun;
  USBH_MSC_SCSI_Read(phost,
                     lun,
                     address,
                     pbuf,
                     length);
 
  timeout = phost->Timer;
 
  while (USBH_MSC_RdWrProcess(phost, lun) == USBH_BUSY)
  {
    if(((phost->Timer - timeout) > (10000 * length)) || (phost->device.is_connected == 0))
    {
      MSC_Handle->state = MSC_IDLE;
      return USBH_FAIL;
    }
  }
  MSC_Handle->state = MSC_IDLE;
  return USBH_OK;
}

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USBH_MSC_Write()

USBH_StatusTypeDef USBH_MSC_Write	(	USBH_HandleTypeDef *	phost,
		uint8_t	lun,
		uint32_t	address,
		uint8_t *	pbuf,
		uint32_t	length
	)

USBH_MSC_Write The function performs a Write operation.

Parameters

phost	Host handle
lun	logical Unit Number
address	sector address
pbuf	pointer to data
length	number of sector to write

Return values

USBH

Status

{
  uint32_t timeout;
  MSC_HandleTypeDef *MSC_Handle =  (MSC_HandleTypeDef *) phost->pActiveClass->pData;
 
  if ((phost->device.is_connected == 0) ||
      (phost->gState != HOST_CLASS) ||
      (MSC_Handle->unit[lun].state != MSC_IDLE))
  {
    return  USBH_FAIL;
  }
  MSC_Handle->state = MSC_WRITE;
  MSC_Handle->unit[lun].state = MSC_WRITE;
  MSC_Handle->rw_lun = lun;
  USBH_MSC_SCSI_Write(phost,
                     lun,
                     address,
                     pbuf,
                     length);
 
  timeout = phost->Timer;
  while (USBH_MSC_RdWrProcess(phost, lun) == USBH_BUSY)
  {
    if(((phost->Timer - timeout) >  (10000 * length)) || (phost->device.is_connected == 0))
    {
      MSC_Handle->state = MSC_IDLE;
      return USBH_FAIL;
    }
  }
  MSC_Handle->state = MSC_IDLE;
  return USBH_OK;
}

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