| 1 | /*
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| 2 | * Copyright (c) 2011 Martin Decky
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup mouse_proto
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| 30 | * @ingroup input
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| 31 | * @{
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| 32 | */
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| 33 | /**
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| 34 | * @file
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| 35 | * @brief ADB protocol driver.
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| 36 | */
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| 37 |
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| 38 | #include <bool.h>
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| 39 | #include <mouse.h>
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| 40 | #include <mouse_port.h>
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| 41 | #include <mouse_proto.h>
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| 42 |
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| 43 | static mouse_dev_t *mouse_dev;
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| 44 | static bool b1_pressed;
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| 45 | static bool b2_pressed;
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| 46 |
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| 47 | static int adb_proto_init(mouse_dev_t *mdev)
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| 48 | {
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| 49 | mouse_dev = mdev;
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| 50 | b1_pressed = false;
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| 51 | b2_pressed = false;
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| 52 |
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| 53 | return 0;
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| 54 | }
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| 55 |
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| 56 | /** Process mouse data */
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| 57 | static void adb_proto_parse(sysarg_t data)
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| 58 | {
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| 59 | bool b1, b2;
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| 60 | uint16_t udx, udy;
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| 61 | int dx, dy;
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| 62 |
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| 63 | /* Extract fields. */
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| 64 | b1 = ((data >> 15) & 1) == 0;
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| 65 | udy = (data >> 8) & 0x7f;
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| 66 | b2 = ((data >> 7) & 1) == 0;
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| 67 | udx = data & 0x7f;
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| 68 |
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| 69 | /* Decode 7-bit two's complement signed values. */
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| 70 | dx = (udx & 0x40) ? (udx - 0x80) : udx;
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| 71 | dy = (udy & 0x40) ? (udy - 0x80) : udy;
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| 72 |
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| 73 | if (b1 != b1_pressed) {
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| 74 | mouse_push_event_button(mouse_dev, 1, b1);
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| 75 | b1_pressed = b1;
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| 76 | }
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| 77 |
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| 78 | if (b2 != b2_pressed) {
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| 79 | mouse_push_event_button(mouse_dev, 2, b2);
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| 80 | b1_pressed = b1;
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| 81 | }
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| 82 |
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| 83 | if (dx != 0 || dy != 0)
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| 84 | mouse_push_event_move(mouse_dev, dx, dy, 0);
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| 85 | }
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| 86 |
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| 87 | mouse_proto_ops_t adb_proto = {
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| 88 | .parse = adb_proto_parse,
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| 89 | .init = adb_proto_init
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| 90 | };
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| 91 |
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| 92 | /**
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| 93 | * @}
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| 94 | */
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