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common/usbx_host_classes/src/ux_host_class_hid_mouse_wheel_get.c
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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 */
/** */
/** HID Mouse Client Class */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_class_hid.h"
#include "ux_host_class_hid_mouse.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_class_hid_mouse_wheel_get PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function reads the mouse wheel position (up or down). */
/* */
/* INPUT */
/* */
/* mouse_instance Pointer to mouse instance */
/* mouse_wheel_movement Current Mouse wheel movement */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* HID Mouse Class */
/* */
/* 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_class_hid_mouse_wheel_get(UX_HOST_CLASS_HID_MOUSE *mouse_instance,
SLONG *mouse_wheel_movement)
{
UX_HOST_CLASS_HID *hid;
/* Get the HID class associated with the HID client. */
hid = mouse_instance -> ux_host_class_hid_mouse_hid;
/* Ensure the instance is valid. */
if (_ux_host_stack_class_instance_verify(_ux_system_host_class_hid_name, (VOID *) hid) != UX_SUCCESS)
{
/* Error trap. */
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_HOST_CLASS_INSTANCE_UNKNOWN);
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_HOST_CLASS_INSTANCE_UNKNOWN, hid, 0, 0, UX_TRACE_ERRORS, 0, 0)
return(UX_HOST_CLASS_INSTANCE_UNKNOWN);
}
/* Report the mouse wheel movement. */
*mouse_wheel_movement = (SLONG)(mouse_instance -> ux_host_class_hid_mouse_wheel);
/* The status will tell the application there is something valid in the usage/value. */
return(UX_SUCCESS);
}