1 /**************************************************************************/ 2 /* */ 3 /* Copyright (c) Microsoft Corporation. All rights reserved. */ 4 /* */ 5 /* This software is licensed under the Microsoft Software License */ 6 /* Terms for Microsoft Azure RTOS. Full text of the license can be */ 7 /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */ 8 /* and in the root directory of this software. */ 9 /* */ 10 /**************************************************************************/ 11 12 13 /**************************************************************************/ 14 /**************************************************************************/ 15 /** */ 16 /** USBX Component */ 17 /** */ 18 /** HID Mouse Client Class */ 19 /** */ 20 /**************************************************************************/ 21 /**************************************************************************/ 22 23 24 /* Include necessary system files. */ 25 26 #define UX_SOURCE_CODE 27 28 #include "ux_api.h" 29 #include "ux_host_class_hid.h" 30 #include "ux_host_class_hid_mouse.h" 31 #include "ux_host_stack.h" 32 33 34 /**************************************************************************/ 35 /* */ 36 /* FUNCTION RELEASE */ 37 /* */ 38 /* _ux_host_class_hid_mouse_callback PORTABLE C */ 39 /* 6.1 */ 40 /* AUTHOR */ 41 /* */ 42 /* Chaoqiong Xiao, Microsoft Corporation */ 43 /* */ 44 /* DESCRIPTION */ 45 /* */ 46 /* This function is the callback mechanism for a report registration. */ 47 /* For the mouse, we filter the mouse coordinate changes and the */ 48 /* state of the buttons. */ 49 /* */ 50 /* INPUT */ 51 /* */ 52 /* callback Pointer to callback */ 53 /* */ 54 /* OUTPUT */ 55 /* */ 56 /* None */ 57 /* */ 58 /* CALLS */ 59 /* */ 60 /* None */ 61 /* */ 62 /* CALLED BY */ 63 /* */ 64 /* HID Class */ 65 /* */ 66 /* RELEASE HISTORY */ 67 /* */ 68 /* DATE NAME DESCRIPTION */ 69 /* */ 70 /* 05-19-2020 Chaoqiong Xiao Initial Version 6.0 */ 71 /* 09-30-2020 Chaoqiong Xiao Modified comment(s), */ 72 /* resulting in version 6.1 */ 73 /* */ 74 /**************************************************************************/ _ux_host_class_hid_mouse_callback(UX_HOST_CLASS_HID_REPORT_CALLBACK * callback)75VOID _ux_host_class_hid_mouse_callback(UX_HOST_CLASS_HID_REPORT_CALLBACK *callback) 76 { 77 78 UX_HOST_CLASS_HID_CLIENT *hid_client; 79 UX_HOST_CLASS_HID_MOUSE *mouse_instance; 80 81 /* Get the HID client instance that issued the callback. */ 82 hid_client = callback -> ux_host_class_hid_report_callback_client; 83 84 /* Get the mouse local instance */ 85 mouse_instance = (UX_HOST_CLASS_HID_MOUSE *) hid_client -> ux_host_class_hid_client_local_instance; 86 87 /* Analyze the usage we have received. */ 88 switch (callback -> ux_host_class_hid_report_callback_usage) 89 { 90 91 92 /* X/Y Axis movement. */ 93 case UX_HOST_CLASS_HID_MOUSE_AXIS_X : 94 95 /* Add the deplacement to the position. */ 96 mouse_instance -> ux_host_class_hid_mouse_x_position += (SCHAR) callback -> ux_host_class_hid_report_callback_value; 97 98 break; 99 100 case UX_HOST_CLASS_HID_MOUSE_AXIS_Y : 101 102 /* Add the deplacement to the position. */ 103 mouse_instance -> ux_host_class_hid_mouse_y_position += (SCHAR) callback -> ux_host_class_hid_report_callback_value; 104 break; 105 106 /* Buttons. */ 107 case UX_HOST_CLASS_HID_MOUSE_BUTTON_1 : 108 109 /* Check the state of button 1. */ 110 if (callback -> ux_host_class_hid_report_callback_value == UX_TRUE) 111 mouse_instance -> ux_host_class_hid_mouse_buttons |= UX_HOST_CLASS_HID_MOUSE_BUTTON_1_PRESSED; 112 else 113 mouse_instance -> ux_host_class_hid_mouse_buttons &= (ULONG)~UX_HOST_CLASS_HID_MOUSE_BUTTON_1_PRESSED; 114 break; 115 116 case UX_HOST_CLASS_HID_MOUSE_BUTTON_2 : 117 118 /* Check the state of button 2. */ 119 if (callback -> ux_host_class_hid_report_callback_value == UX_TRUE) 120 mouse_instance -> ux_host_class_hid_mouse_buttons |= UX_HOST_CLASS_HID_MOUSE_BUTTON_2_PRESSED; 121 else 122 mouse_instance -> ux_host_class_hid_mouse_buttons &= (ULONG)~UX_HOST_CLASS_HID_MOUSE_BUTTON_2_PRESSED; 123 break; 124 125 case UX_HOST_CLASS_HID_MOUSE_BUTTON_3 : 126 127 /* Check the state of button 3. */ 128 if (callback -> ux_host_class_hid_report_callback_value == UX_TRUE) 129 mouse_instance -> ux_host_class_hid_mouse_buttons |= UX_HOST_CLASS_HID_MOUSE_BUTTON_3_PRESSED; 130 else 131 mouse_instance -> ux_host_class_hid_mouse_buttons &= (ULONG)~UX_HOST_CLASS_HID_MOUSE_BUTTON_3_PRESSED; 132 break; 133 134 135 /* Wheel movement. */ 136 case UX_HOST_CLASS_HID_MOUSE_WHEEL : 137 138 mouse_instance -> ux_host_class_hid_mouse_wheel += (SCHAR) callback -> ux_host_class_hid_report_callback_value; 139 140 break; 141 142 default : 143 144 /* We have received a Usage we don't know about. Ignore it. */ 145 break; 146 } 147 148 /* Return to caller. */ 149 return; 150 } 151 152
