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 /** GUIX Component                                                        */
17 /**                                                                       */
18 /**   System Management (System)                                          */
19 /**                                                                       */
20 /**************************************************************************/
21 
22 #define GX_SOURCE_CODE
23 
24 
25 /* Include necessary system files.  */
26 
27 #include "gx_api.h"
28 #include "gx_system.h"
29 
30 /**************************************************************************/
31 /*                                                                        */
32 /*  FUNCTION                                               RELEASE        */
33 /*                                                                        */
34 /*    _gx_system_pen_speed_update                         PORTABLE C      */
35 /*                                                           6.1          */
36 /*  AUTHOR                                                                */
37 /*                                                                        */
38 /*    Kenneth Maxwell, Microsoft Corporation                              */
39 /*                                                                        */
40 /*  DESCRIPTION                                                           */
41 /*                                                                        */
42 /*    This service sends the specified event for processing.              */
43 /*                                                                        */
44 /*  INPUT                                                                 */
45 /*                                                                        */
46 /*    event                                 Pointer to event              */
47 /*                                                                        */
48 /*  OUTPUT                                                                */
49 /*                                                                        */
50 /*    status                                Completion status             */
51 /*                                                                        */
52 /*  CALLS                                                                 */
53 /*                                                                        */
54 /*    GX_ABS                                Compute the absolute value    */
55 /*    tx_queue_send                         Send message through ThreadX  */
56 /*                                            queue                       */
57 /*                                                                        */
58 /*  CALLED BY                                                             */
59 /*                                                                        */
60 /*    _gx_system_event_fold                 Fold GUIX system events       */
61 /*    _gx_system_event_send                 Send GUIX system event        */
62 /*                                                                        */
63 /*  RELEASE HISTORY                                                       */
64 /*                                                                        */
65 /*    DATE              NAME                      DESCRIPTION             */
66 /*                                                                        */
67 /*  05-19-2020     Kenneth Maxwell          Initial Version 6.0           */
68 /*  09-30-2020     Kenneth Maxwell          Modified comment(s),          */
69 /*                                            resulting in version 6.1    */
70 /*                                                                        */
71 /**************************************************************************/
_gx_system_pen_speed_update(GX_POINT * current)72 VOID _gx_system_pen_speed_update(GX_POINT *current)
73 {
74 ULONG current_clock;
75 
76 #ifdef GX_THREADX_BINDING
77     current_clock = tx_time_get();
78 #else
79     current_clock = GX_SYSTEM_TIME_GET;
80 #endif
81 
82     _gx_system_clock_delta = (LONG)(current_clock - _gx_system_last_clock);
83 
84     if (_gx_system_clock_delta > 0)
85     {
86         if (_gx_system_clock_delta < (LONG)_gx_system_pen_configuration.gx_pen_configuration_max_pen_speed_ticks)
87         {
88             _gx_system_pen_speed_x = GX_FIXED_VAL_MAKE(current -> gx_point_x - _gx_system_last_pen_point.gx_point_x);
89             _gx_system_pen_speed_x /= _gx_system_clock_delta;
90             _gx_system_pen_speed_y = GX_FIXED_VAL_MAKE(current -> gx_point_y - _gx_system_last_pen_point.gx_point_y);
91             _gx_system_pen_speed_y /= _gx_system_clock_delta;
92         }
93         else
94         {
95             _gx_system_pen_speed_x = _gx_system_pen_speed_y = 0;
96         }
97         _gx_system_last_clock = current_clock;
98         _gx_system_last_pen_point = *current;
99     }
100 }
101 
102