host_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
***
*** File: hostapi.c
***
*** Comments:
*** This file contains the USB Host API specific functions.
***
**************************************************************************
*END*********************************************************************/
#ifdef __USB_OS_MQX__
#include "mqx.h"
#include "bsp.h"
#else
#include "types.h"
#include "vusb11.h"
#include "usb.h"
#include "hostapi.h"
#endif
#include "usbprv.h"
#include "usbhprv.h"
/*FUNCTION*-------------------------------------------------------------
*
* Function Name : _usb_host_send_data
* Returned Value : error or status of the transfer
* Comments :
* The Send Data routine is non-blocking routine that causes a block of data
* to be made available for transmission to the USB host.
*
*END*-----------------------------------------------------------------*/
uint_8 _usb_host_send_data
(
/* [IN] the USB Host state structure */
_usb_host_handle handle,
/* Index into the Pipe Descriptor Array */
int_16 pipeid,
/* Address of the data to send */
uchar_ptr buff_ptr,
/* Number of bytes to Send */
uint_32 length
)
{ /* Body */
PIPE_DESCRIPTOR_STRUCT_PTR pipe_descr_ptr;
USB_HOST_STATE_STRUCT_PTR usb_host_ptr;
usb_host_ptr = (USB_HOST_STATE_STRUCT_PTR)handle;
/* Check if pipe id is valid */
if (pipeid < usb_host_ptr->MAX_PIPES) {
pipe_descr_ptr = &usb_host_ptr->PIPE_DESCRIPTOR_BASE_PTR[pipeid];
} else {
return USBERR_INVALID_PIPE_ID;
} /* Endif */
USB_lock();
/* Check if a previously queued transfer is still in progress */
if (pipe_descr_ptr->STATUS != USB_STATUS_IDLE) {
USB_unlock();
return USB_STATUS_TRANSFER_IN_PROGRESS;
} else {
USB_unlock();
/* Initialize the pipe descriptor with the new send request */
pipe_descr_ptr->SOFAR = 0;
pipe_descr_ptr->TX1_PTR = buff_ptr;
if ((pipe_descr_ptr->PIPETYPE == USB_ISOCHRONOUS_PIPE) &&
(pipe_descr_ptr->TODO1 > pipe_descr_ptr->MAX_PKT_SIZE))
{
/* For isochronous pipes, we transfer a mzximum of MAX_PKT_SIZE
** packet
*/
pipe_descr_ptr->TODO1 = pipe_descr_ptr->MAX_PKT_SIZE;
} else {
/* For all others max of 64KB */
pipe_descr_ptr->TODO1 = length;
} /* Endif */
USB_lock();
/* return successful transfer initiation status */
pipe_descr_ptr->STATUS = USB_STATUS_TRANSFER_QUEUED;
#ifdef __USB_OS_MQX__
/* Call the low-level send routine */
((USB_CALLBACK_FUNCTIONS_STRUCT_PTR)usb_host_ptr->CALLBACK_STRUCT_PTR)->\
HOST_SEND(handle, pipe_descr_ptr);
#else
_usb_hci_vusb11_send_data(handle, pipe_descr_ptr);
#endif
/* Indicate that a packet is pending */
pipe_descr_ptr->PACKETPENDING = TRUE;
USB_unlock();
} /* Endif */
return USB_STATUS_TRANSFER_QUEUED;
} /* Endbody */
/* EOF */