EndpointStream.c

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/*
 * @brief Endpoint data stream transmission and reception management for the LPC microcontrollers
 *
 * @note
 * Copyright(C) NXP Semiconductors, 2012
 * All rights reserved.
 *
 * @par
 * Software that is described herein is for illustrative purposes only
 * which provides customers with programming information regarding the
 * LPC products.  This software is supplied "AS IS" without any warranties of
 * any kind, and NXP Semiconductors and its licensor disclaim any and
 * all warranties, express or implied, including all implied warranties of
 * merchantability, fitness for a particular purpose and non-infringement of
 * intellectual property rights.  NXP Semiconductors assumes no responsibility
 * or liability for the use of the software, conveys no license or rights under any
 * patent, copyright, mask work right, or any other intellectual property rights in
 * or to any products. NXP Semiconductors reserves the right to make changes
 * in the software without notification. NXP Semiconductors also makes no
 * representation or warranty that such application will be suitable for the
 * specified use without further testing or modification.
 *
 * @par
 * Permission to use, copy, modify, and distribute this software and its
 * documentation is hereby granted, under NXP Semiconductors' and its
 * licensor's relevant copyrights in the software, without fee, provided that it
 * is used in conjunction with NXP Semiconductors microcontrollers.  This
 * copyright, permission, and disclaimer notice must appear in all copies of
 * this code.
 */

#define  __INCLUDE_FROM_USB_DRIVER
#include "USBMode.h"

#if defined(USB_CAN_BE_DEVICE)

#include "EndpointStream.h"

#if !defined(CONTROL_ONLY_DEVICE)
uint8_t Endpoint_Discard_Stream(uint8_t corenum,
        uint16_t Length,
        uint16_t *const BytesProcessed)
{
 uint32_t i;
 for (i = 0; i < Length; i++)
  Endpoint_Discard_8(corenum);
 return ENDPOINT_RWSTREAM_NoError;
}

uint8_t Endpoint_Null_Stream(uint8_t corenum,
        uint16_t Length,
        uint16_t *const BytesProcessed)
{
 uint32_t i;

 while ( !Endpoint_IsINReady(corenum) ) { /*-- Wait until ready --*/
  Delay_MS(2);
 }
 for (i = 0; i < Length; i++)
  Endpoint_Write_8(corenum, 0);
 return ENDPOINT_RWSTREAM_NoError;
}

uint8_t Endpoint_Write_Stream_LE(uint8_t corenum,
         const void *const Buffer,
         uint16_t Length,
         uint16_t *const BytesProcessed)
{
 uint16_t i;

 while ( !Endpoint_IsINReady(corenum) ) { /*-- Wait until ready --*/
  Delay_MS(2);
 }
 for (i = 0; i < Length; i++)
  Endpoint_Write_8(corenum, ((uint8_t *) Buffer)[i]);

 return ENDPOINT_RWSTREAM_NoError;
}

uint8_t Endpoint_Write_Stream_BE(uint8_t corenum,
         const void *const Buffer,
         uint16_t Length,
         uint16_t *const BytesProcessed)
{
 uint16_t i;

 for (i = 0; i < Length; i++)
  Endpoint_Write_8(corenum, ((uint8_t *) Buffer)[Length - 1 - i]);
 return ENDPOINT_RWSTREAM_NoError;
}

uint8_t Endpoint_Read_Stream_LE(uint8_t corenum,
        void *const Buffer,
        uint16_t Length,
        uint16_t *const BytesProcessed)
{
 uint16_t i;
 if (endpointselected[corenum] == ENDPOINT_CONTROLEP) {
  if (usb_data_buffer_size[corenum] == 0) {
   return ENDPOINT_RWSTREAM_IncompleteTransfer;
  }
 }
 else if (usb_data_buffer_OUT_size[corenum] == 0)    {
  return ENDPOINT_RWSTREAM_IncompleteTransfer;
 }

 for (i = 0; i < Length; i++) {
  #if defined(__LPC175X_6X__) || defined(__LPC177X_8X__) || defined(__LPC407X_8X__)
  if (endpointselected[corenum] != ENDPOINT_CONTROLEP) {
   while (usb_data_buffer_OUT_size[corenum] == 0) ; /* Current Fix for LPC17xx, havent checked for others */
  }
  #endif
  ((uint8_t *) Buffer)[i] = Endpoint_Read_8(corenum);
 }
 return ENDPOINT_RWSTREAM_NoError;
}

uint8_t Endpoint_Read_Stream_BE(void *const Buffer,
        uint16_t Length,
        uint16_t *const BytesProcessed)
{
 return ENDPOINT_RWSTREAM_NoError;
}

#endif

uint8_t Endpoint_Write_Control_Stream_LE(uint8_t corenum, const void *const Buffer,
           uint16_t Length)
{
 Endpoint_Write_Stream_LE(corenum, (uint8_t *) Buffer, MIN(Length, USB_ControlRequest.wLength), NULL);
 Endpoint_ClearIN(corenum);
 //  while (!(Endpoint_IsOUTReceived()))
 //  {
 //  }
 return ENDPOINT_RWCSTREAM_NoError;
}

uint8_t Endpoint_Write_Control_Stream_BE(const void *const Buffer,
           uint16_t Length)
{
 return ENDPOINT_RWCSTREAM_NoError;
}

uint8_t Endpoint_Read_Control_Stream_LE(uint8_t corenum, void *const Buffer,
          uint16_t Length)
{
 while (!Endpoint_IsOUTReceived(corenum)) ; // FIXME: this safe checking is fine for LPC18xx
 Endpoint_Read_Stream_LE(corenum, Buffer, Length, NULL);  // but hangs LPC17xx --> comment out
 Endpoint_ClearOUT(corenum);
 return ENDPOINT_RWCSTREAM_NoError;
}

uint8_t Endpoint_Read_Control_Stream_BE(void *const Buffer,
          uint16_t Length)
{
 return ENDPOINT_RWCSTREAM_NoError;
}

#endif