USBH_PIPES_Private_Functions

Collaboration diagram for USBH_PIPES_Private_Functions:

Functions
static uint16_t	USBH_GetFreePipe (USBH_HandleTypeDef *phost)
	USBH_GetFreePipe. More...
USBH_StatusTypeDef	USBH_OpenPipe (USBH_HandleTypeDef *phost, uint8_t pipe_num, uint8_t epnum, uint8_t dev_address, uint8_t speed, uint8_t ep_type, uint16_t mps)
	USBH_Open_Pipe Open a pipe. More...
USBH_StatusTypeDef	USBH_ClosePipe (USBH_HandleTypeDef *phost, uint8_t pipe_num)
	USBH_ClosePipe Close a pipe. More...
uint8_t	USBH_AllocPipe (USBH_HandleTypeDef *phost, uint8_t ep_addr)
	USBH_Alloc_Pipe Allocate a new Pipe. More...
USBH_StatusTypeDef	USBH_FreePipe (USBH_HandleTypeDef *phost, uint8_t idx)
	USBH_Free_Pipe Free the USB Pipe. More...

Detailed Description

Function Documentation

USBH_GetFreePipe()

static uint16_t USBH_GetFreePipe ( USBH_HandleTypeDef *  phost )

static

USBH_GetFreePipe.

Parameters

phost

Host Handle Get a free Pipe number for allocation to a device endpoint

Return values

idx	Free Pipe number

{
  uint8_t idx = 0;
 
  for (idx = 0 ; idx < 11 ; idx++)
  {
    if ((phost->Pipes[idx] & 0x8000) == 0)
    {
       return idx;
    }
  }
  return 0xFFFF;
}

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USBH_OpenPipe()

USBH_StatusTypeDef USBH_OpenPipe	(	USBH_HandleTypeDef *	phost,
		uint8_t	pipe_num,
		uint8_t	epnum,
		uint8_t	dev_address,
		uint8_t	speed,
		uint8_t	ep_type,
		uint16_t	mps
	)

USBH_Open_Pipe Open a pipe.

Parameters

phost	Host Handle
pipe_num	Pipe Number
dev_address	USB Device address allocated to attached device
speed	: USB device speed (Full/Low)
ep_type	end point type (Bulk/int/ctl)
mps	max pkt size

Return values

USBH

Status

{
 
  USBH_LL_OpenPipe(phost,
                        pipe_num,
                        epnum,
                        dev_address,
                        speed,
                        ep_type,
                        mps);
 
  return USBH_OK;
 
}

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USBH_ClosePipe()

USBH_StatusTypeDef USBH_ClosePipe	(	USBH_HandleTypeDef *	phost,
		uint8_t	pipe_num
	)

USBH_ClosePipe Close a pipe.

Parameters

phost	Host Handle
pipe_num	Pipe Number

Return values

USBH

Status

{
 
  USBH_LL_ClosePipe(phost, pipe_num);
 
  return USBH_OK;
 
}

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USBH_AllocPipe()

uint8_t USBH_AllocPipe	(	USBH_HandleTypeDef *	phost,
		uint8_t	ep_addr
	)

USBH_Alloc_Pipe Allocate a new Pipe.

Parameters

phost	Host Handle
ep_addr	End point for which the Pipe to be allocated

Return values

Pipe

number

{
  uint16_t pipe;
 
  pipe =  USBH_GetFreePipe(phost);
 
  if (pipe != 0xFFFF)
  {
    phost->Pipes[pipe] = 0x8000 | ep_addr;
  }
  return pipe;
}

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USBH_FreePipe()

USBH_StatusTypeDef USBH_FreePipe	(	USBH_HandleTypeDef *	phost,
		uint8_t	idx
	)

USBH_Free_Pipe Free the USB Pipe.

Parameters

phost	Host Handle
idx	Pipe number to be freed

Return values

USBH

Status

{
   if(idx < 11)
   {
     phost->Pipes[idx] &= 0x7FFF;
   }
   return USBH_OK;
}

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