PS/2 Keyboard
PS2Keyboard.cpp@0:62b62530a82f, 2012-10-11 (annotated)
- Committer:
- pprasad7
- Date:
- Thu Oct 11 20:15:09 2012 +0000
- Revision:
- 0:62b62530a82f
PS/2 Input;
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
pprasad7 | 0:62b62530a82f | 1 | /** |
pprasad7 | 0:62b62530a82f | 2 | * PS/2 keyboard interface control class (Version 0.0.1) |
pprasad7 | 0:62b62530a82f | 3 | * |
pprasad7 | 0:62b62530a82f | 4 | * Copyright (C) 2010 Shinichiro Nakamura (CuBeatSystems) |
pprasad7 | 0:62b62530a82f | 5 | * http://shinta.main.jp/ |
pprasad7 | 0:62b62530a82f | 6 | */ |
pprasad7 | 0:62b62530a82f | 7 | #include "PS2Keyboard.h" |
pprasad7 | 0:62b62530a82f | 8 | |
pprasad7 | 0:62b62530a82f | 9 | PS2Keyboard::PS2Keyboard(PinName clk_pin, PinName dat_pin) |
pprasad7 | 0:62b62530a82f | 10 | : ps2kb_init(clk_pin, dat_pin), ps2kb(clk_pin, dat_pin) { |
pprasad7 | 0:62b62530a82f | 11 | } |
pprasad7 | 0:62b62530a82f | 12 | |
pprasad7 | 0:62b62530a82f | 13 | PS2Keyboard::~PS2Keyboard() { |
pprasad7 | 0:62b62530a82f | 14 | } |
pprasad7 | 0:62b62530a82f | 15 | |
pprasad7 | 0:62b62530a82f | 16 | bool PS2Keyboard::processing(keyboard_event_t *p) { |
pprasad7 | 0:62b62530a82f | 17 | bool emit = false; |
pprasad7 | 0:62b62530a82f | 18 | const int c = ps2kb.getc(); |
pprasad7 | 0:62b62530a82f | 19 | if (0 <= c) { |
pprasad7 | 0:62b62530a82f | 20 | scancode[count++] = c; |
pprasad7 | 0:62b62530a82f | 21 | switch (count) { |
pprasad7 | 0:62b62530a82f | 22 | case 1: |
pprasad7 | 0:62b62530a82f | 23 | if ((scancode[0] != 0xE0) |
pprasad7 | 0:62b62530a82f | 24 | && (scancode[0] != 0xE1) |
pprasad7 | 0:62b62530a82f | 25 | && (scancode[0] != 0xF0)) { |
pprasad7 | 0:62b62530a82f | 26 | p->type = KeyMake; |
pprasad7 | 0:62b62530a82f | 27 | p->length = count; |
pprasad7 | 0:62b62530a82f | 28 | memcpy(p->scancode, scancode, sizeof(p->scancode)); |
pprasad7 | 0:62b62530a82f | 29 | emit = true; |
pprasad7 | 0:62b62530a82f | 30 | count = 0; |
pprasad7 | 0:62b62530a82f | 31 | } |
pprasad7 | 0:62b62530a82f | 32 | break; |
pprasad7 | 0:62b62530a82f | 33 | case 2: |
pprasad7 | 0:62b62530a82f | 34 | if (scancode[0] == 0xF0) { |
pprasad7 | 0:62b62530a82f | 35 | p->type = KeyBreak; |
pprasad7 | 0:62b62530a82f | 36 | p->length = count; |
pprasad7 | 0:62b62530a82f | 37 | memcpy(p->scancode, scancode, sizeof(p->scancode)); |
pprasad7 | 0:62b62530a82f | 38 | emit = true; |
pprasad7 | 0:62b62530a82f | 39 | count = 0; |
pprasad7 | 0:62b62530a82f | 40 | } |
pprasad7 | 0:62b62530a82f | 41 | if ((scancode[0] == 0xE0) |
pprasad7 | 0:62b62530a82f | 42 | && (scancode[1] != 0xF0) |
pprasad7 | 0:62b62530a82f | 43 | && (scancode[1] != 0x12)) { |
pprasad7 | 0:62b62530a82f | 44 | p->type = KeyMake; |
pprasad7 | 0:62b62530a82f | 45 | p->length = count; |
pprasad7 | 0:62b62530a82f | 46 | memcpy(p->scancode, scancode, sizeof(p->scancode)); |
pprasad7 | 0:62b62530a82f | 47 | emit = true; |
pprasad7 | 0:62b62530a82f | 48 | count = 0; |
pprasad7 | 0:62b62530a82f | 49 | } |
pprasad7 | 0:62b62530a82f | 50 | break; |
pprasad7 | 0:62b62530a82f | 51 | case 3: |
pprasad7 | 0:62b62530a82f | 52 | if ((scancode[0] == 0xE0) |
pprasad7 | 0:62b62530a82f | 53 | && (scancode[1] == 0xF0) |
pprasad7 | 0:62b62530a82f | 54 | && (scancode[2] != 0x7C)) { |
pprasad7 | 0:62b62530a82f | 55 | p->type = KeyBreak; |
pprasad7 | 0:62b62530a82f | 56 | p->length = count; |
pprasad7 | 0:62b62530a82f | 57 | memcpy(p->scancode, scancode, sizeof(p->scancode)); |
pprasad7 | 0:62b62530a82f | 58 | emit = true; |
pprasad7 | 0:62b62530a82f | 59 | count = 0; |
pprasad7 | 0:62b62530a82f | 60 | } |
pprasad7 | 0:62b62530a82f | 61 | break; |
pprasad7 | 0:62b62530a82f | 62 | case 4: |
pprasad7 | 0:62b62530a82f | 63 | if ((scancode[0] == 0xE0) |
pprasad7 | 0:62b62530a82f | 64 | && (scancode[1] == 0x12) |
pprasad7 | 0:62b62530a82f | 65 | && (scancode[2] == 0xE0) |
pprasad7 | 0:62b62530a82f | 66 | && (scancode[3] == 0x7C)) { |
pprasad7 | 0:62b62530a82f | 67 | p->type = KeyMake; |
pprasad7 | 0:62b62530a82f | 68 | p->length = count; |
pprasad7 | 0:62b62530a82f | 69 | memcpy(p->scancode, scancode, sizeof(p->scancode)); |
pprasad7 | 0:62b62530a82f | 70 | emit = true; |
pprasad7 | 0:62b62530a82f | 71 | count = 0; |
pprasad7 | 0:62b62530a82f | 72 | } |
pprasad7 | 0:62b62530a82f | 73 | break; |
pprasad7 | 0:62b62530a82f | 74 | case 5: |
pprasad7 | 0:62b62530a82f | 75 | // Do nothing. |
pprasad7 | 0:62b62530a82f | 76 | break; |
pprasad7 | 0:62b62530a82f | 77 | case 6: |
pprasad7 | 0:62b62530a82f | 78 | if ((scancode[0] == 0xE0) |
pprasad7 | 0:62b62530a82f | 79 | && (scancode[1] == 0xF0) |
pprasad7 | 0:62b62530a82f | 80 | && (scancode[2] == 0x7C) |
pprasad7 | 0:62b62530a82f | 81 | && (scancode[3] == 0xE0) |
pprasad7 | 0:62b62530a82f | 82 | && (scancode[4] == 0xF0) |
pprasad7 | 0:62b62530a82f | 83 | && (scancode[5] == 0x12)) { |
pprasad7 | 0:62b62530a82f | 84 | p->type = KeyBreak; |
pprasad7 | 0:62b62530a82f | 85 | p->length = count; |
pprasad7 | 0:62b62530a82f | 86 | memcpy(p->scancode, scancode, sizeof(p->scancode)); |
pprasad7 | 0:62b62530a82f | 87 | emit = true; |
pprasad7 | 0:62b62530a82f | 88 | count = 0; |
pprasad7 | 0:62b62530a82f | 89 | } |
pprasad7 | 0:62b62530a82f | 90 | break; |
pprasad7 | 0:62b62530a82f | 91 | case 7: |
pprasad7 | 0:62b62530a82f | 92 | // Do nothing. |
pprasad7 | 0:62b62530a82f | 93 | break; |
pprasad7 | 0:62b62530a82f | 94 | case 8: |
pprasad7 | 0:62b62530a82f | 95 | if ((scancode[0] == 0xE1) |
pprasad7 | 0:62b62530a82f | 96 | && (scancode[1] == 0x14) |
pprasad7 | 0:62b62530a82f | 97 | && (scancode[2] == 0x77) |
pprasad7 | 0:62b62530a82f | 98 | && (scancode[3] == 0xE1) |
pprasad7 | 0:62b62530a82f | 99 | && (scancode[4] == 0xF0) |
pprasad7 | 0:62b62530a82f | 100 | && (scancode[5] == 0x14) |
pprasad7 | 0:62b62530a82f | 101 | && (scancode[6] == 0xF0) |
pprasad7 | 0:62b62530a82f | 102 | && (scancode[7] == 0x77)) { |
pprasad7 | 0:62b62530a82f | 103 | p->type = KeyMake; |
pprasad7 | 0:62b62530a82f | 104 | p->length = count; |
pprasad7 | 0:62b62530a82f | 105 | memcpy(p->scancode, scancode, sizeof(p->scancode)); |
pprasad7 | 0:62b62530a82f | 106 | emit = true; |
pprasad7 | 0:62b62530a82f | 107 | count = 0; |
pprasad7 | 0:62b62530a82f | 108 | } |
pprasad7 | 0:62b62530a82f | 109 | break; |
pprasad7 | 0:62b62530a82f | 110 | default: |
pprasad7 | 0:62b62530a82f | 111 | count = 0; |
pprasad7 | 0:62b62530a82f | 112 | break; |
pprasad7 | 0:62b62530a82f | 113 | } |
pprasad7 | 0:62b62530a82f | 114 | count = count % sizeof(scancode); |
pprasad7 | 0:62b62530a82f | 115 | } |
pprasad7 | 0:62b62530a82f | 116 | return emit; |
pprasad7 | 0:62b62530a82f | 117 | } |