dev_snd.c
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/*HEADER******************************************************************
**************************************************************************
***
*** Copyright (c) 2001-2002 ARC International.
*** All rights reserved
***
*** This software embodies materials and concepts which are
*** confidential to ARC International and is made
*** available solely pursuant to the terms of a written license
*** agreement with ARC International
***
*** $Workfile:devapi.c$
*** $Revision: 1.1 $
*** $Date: 2003/02/17 20:49:01 $
***
*** Comments:
*** This file contains the USB device API.
***
**************************************************************************
*END*********************************************************************/
#ifdef __USB_OS_MQX__
#include "mqx.h"
#include "bsp.h"
#else
#include "devapi.h"
#include "usb.h"
#include "vusb11.h"
#endif
#include "usbprv.h"
#include "usbdprv.h"
/*FUNCTION*----------------------------------------------------------------
*
* Function Name : _usb_device_send_data
* Returned Value : USB_OK or error code
* Comments :
* The Send Data routine is non-blocking routine that causes a block of data up
* to 64k bytes long to be made available for transmission to the USB host. The
* inputs to send data are bEP a byte endpoint number in the range 0-15
* Send_Data returns a status byte indicating whether the transfer
* will be initiated.
*
*END*--------------------------------------------------------------------*/
uint_8 _usb_device_send_data
(
/* [IN] handle to USB device */
_usb_device_handle handle,
/* [IN] Endpoint to send data to */
uint_8 endpoint_number,
/* [IN] Pointer to data to send */
uchar_ptr buff_ptr,
/* [IN] Length of data to send */
uint_32 size
)
{ /* Body */
XD_STRUCT_PTR pxd;
USB_DEV_STATE_STRUCT_PTR usb_dev_ptr;
usb_dev_ptr = (USB_DEV_STATE_STRUCT_PTR)handle;
USB_lock();
pxd = &usb_dev_ptr->XDSEND[endpoint_number];
/*
** Check if the endpoint is disabled
*/
if (pxd->STATUS == USB_STATUS_DISABLED) {
USB_unlock();
return USBERR_ENDPOINT_DISABLED;
} /* Endif */
/*
** Check if any transfer is in progress on this endpoint
*/
if (pxd->STATUS == USB_STATUS_TRANSFER_IN_PROGRESS) {
USB_unlock();
return USBERR_TRANSFER_IN_PROGRESS;
} /* Endif */
if (pxd->TYPE == USB_ISOCHRONOUS_ENDPOINT) {
/* if Isochronous */
if (size > pxd->MAXPACKET) {
/*
** if asked for more than maxPacket
** limit request to maxPacket
*/
size = pxd->MAXPACKET;
} /* Endif */
} /* Endif */
/* The endpoint is enabled and no transfers are pending so queue the
** transmit transfer.
*/
pxd->STARTADDRESS = buff_ptr;
pxd->NEXTADDRESS = buff_ptr;
pxd->TODO = size;
pxd->SOFAR = 0;
pxd->UNACKNOWLEDGEDBYTES = size;
pxd->DIRECTION = USB_SEND;
/* return successful transfer initiation status. */
pxd->STATUS = USB_STATUS_TRANSFER_PENDING;
#ifdef __USB_OS_MQX__
((USB_CALLBACK_FUNCTIONS_STRUCT_PTR)usb_dev_ptr->CALLBACK_STRUCT_PTR)->\
DEV_SEND(handle, USB_SEND, endpoint_number);
#else
_usb_dci_vusb11_submit_transfer(handle, USB_SEND, endpoint_number);
#endif
/*
** If the endpoint is currently stalled notify the user after the
** transfer has been queued. By queuing the transfer the
** operation to revert the stall condition may be separated from
** the the data transfer code.
*/
if (pxd->STATUS == USB_STATUS_STALLED) {
USB_unlock();
return USBERR_ENDPOINT_STALLED;
} /* Endif */
USB_unlock();
return USB_OK;
} /* EndBody */
/* EOF */