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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** USBX Component */
/** */
/** Host Stack */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_stack_interface_endpoint_get PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function returns an endpoint container based on the interface */
/* handle and an endpoint index. */
/* */
/* INPUT */
/* */
/* interface Pointer to interface */
/* endpoint_index Index of endpoint to get */
/* endpoint Destination for endpoint */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* Application */
/* USBX Components */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */
/* 09-30-2020 Chaoqiong Xiao Modified comment(s), */
/* resulting in version 6.1 */
/* */
/**************************************************************************/
UINT _ux_host_stack_interface_endpoint_get(UX_INTERFACE *interface, UINT endpoint_index, UX_ENDPOINT **endpoint)
{
UINT current_endpoint_index;
UX_ENDPOINT *current_endpoint;
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_STACK_INTERFACE_ENDPOINT_GET, interface, endpoint_index, 0, 0, UX_TRACE_HOST_STACK_EVENTS, 0, 0)
/* Do a sanity check on the interface handle. */
if (interface -> ux_interface_handle != (ULONG) (ALIGN_TYPE) interface)
{
/* Error trap. */
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_ENUMERATOR, UX_INTERFACE_HANDLE_UNKNOWN);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_INTERFACE_HANDLE_UNKNOWN, interface, 0, 0, UX_TRACE_ERRORS, 0, 0)
return(UX_INTERFACE_HANDLE_UNKNOWN);
}
/* Start with the endpoint attached to the interface. */
current_endpoint = interface -> ux_interface_first_endpoint;
/* The first endpoint has the index 0. */
current_endpoint_index = 0;
/* Traverse the list of the endpoints until we found the right one. */
while (current_endpoint != UX_NULL)
{
/* Check if the endpoint index matches the current one. */
if (endpoint_index == current_endpoint_index)
{
/* Setup the return endpoint pointer. */
*endpoint=current_endpoint;
/* Return success to the caller. */
return(UX_SUCCESS);
}
/* Move to the next endpoint. */
current_endpoint = current_endpoint -> ux_endpoint_next_endpoint;
/* Move to the next index. */
current_endpoint_index++;
}
/* Error trap. */
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_ENUMERATOR, UX_ENDPOINT_HANDLE_UNKNOWN);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_ENDPOINT_HANDLE_UNKNOWN, endpoint, 0, 0, UX_TRACE_ERRORS, 0, 0)
/* Return an error! */
return(UX_ENDPOINT_HANDLE_UNKNOWN);
}