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common/usbx_host_classes/src/ux_host_class_hid_mouse_callback.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_callback PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function is the callback mechanism for a report registration. */
/* For the mouse, we filter the mouse coordinate changes and the */
/* state of the buttons. */
/* */
/* INPUT */
/* */
/* callback Pointer to callback */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* HID 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 */
/* */
/**************************************************************************/
VOID _ux_host_class_hid_mouse_callback(UX_HOST_CLASS_HID_REPORT_CALLBACK *callback)
{
UX_HOST_CLASS_HID_CLIENT *hid_client;
UX_HOST_CLASS_HID_MOUSE *mouse_instance;
/* Get the HID client instance that issued the callback. */
hid_client = callback -> ux_host_class_hid_report_callback_client;
/* Get the mouse local instance */
mouse_instance = (UX_HOST_CLASS_HID_MOUSE *) hid_client -> ux_host_class_hid_client_local_instance;
/* Analyze the usage we have received. */
switch (callback -> ux_host_class_hid_report_callback_usage)
{
/* X/Y Axis movement. */
case UX_HOST_CLASS_HID_MOUSE_AXIS_X :
/* Add the deplacement to the position. */
mouse_instance -> ux_host_class_hid_mouse_x_position += (SCHAR) callback -> ux_host_class_hid_report_callback_value;
break;
case UX_HOST_CLASS_HID_MOUSE_AXIS_Y :
/* Add the deplacement to the position. */
mouse_instance -> ux_host_class_hid_mouse_y_position += (SCHAR) callback -> ux_host_class_hid_report_callback_value;
break;
/* Buttons. */
case UX_HOST_CLASS_HID_MOUSE_BUTTON_1 :
/* Check the state of button 1. */
if (callback -> ux_host_class_hid_report_callback_value == UX_TRUE)
mouse_instance -> ux_host_class_hid_mouse_buttons |= UX_HOST_CLASS_HID_MOUSE_BUTTON_1_PRESSED;
else
mouse_instance -> ux_host_class_hid_mouse_buttons &= (ULONG)~UX_HOST_CLASS_HID_MOUSE_BUTTON_1_PRESSED;
break;
case UX_HOST_CLASS_HID_MOUSE_BUTTON_2 :
/* Check the state of button 2. */
if (callback -> ux_host_class_hid_report_callback_value == UX_TRUE)
mouse_instance -> ux_host_class_hid_mouse_buttons |= UX_HOST_CLASS_HID_MOUSE_BUTTON_2_PRESSED;
else
mouse_instance -> ux_host_class_hid_mouse_buttons &= (ULONG)~UX_HOST_CLASS_HID_MOUSE_BUTTON_2_PRESSED;
break;
case UX_HOST_CLASS_HID_MOUSE_BUTTON_3 :
/* Check the state of button 3. */
if (callback -> ux_host_class_hid_report_callback_value == UX_TRUE)
mouse_instance -> ux_host_class_hid_mouse_buttons |= UX_HOST_CLASS_HID_MOUSE_BUTTON_3_PRESSED;
else
mouse_instance -> ux_host_class_hid_mouse_buttons &= (ULONG)~UX_HOST_CLASS_HID_MOUSE_BUTTON_3_PRESSED;
break;
/* Wheel movement. */
case UX_HOST_CLASS_HID_MOUSE_WHEEL :
mouse_instance -> ux_host_class_hid_mouse_wheel += (SCHAR) callback -> ux_host_class_hid_report_callback_value;
break;
default :
/* We have received a Usage we don't know about. Ignore it. */
break;
}
/* Return to caller. */
return;
}