Mercurial > lcfOS
annotate cos/kernel/keyboard.c @ 299:674789d9ff37
Added a doc
| author | Windel Bouwman |
|---|---|
| date | Sun, 01 Dec 2013 18:37:23 +0100 |
| parents | 8012221dd740 |
| children |
| rev | line source |
|---|---|
| 24 | 1 #include "kernel.h" |
| 2 | |
| 3 static int shiftstate = 0; | |
| 4 static volatile uint8_t charAvail = 0; | |
| 5 static volatile char kbdchar = ' '; | |
| 6 | |
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7 // TODO: move to user land: |
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8 static char keymap[128] = |
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9 { |
| 24 | 10 '?','?','1','2', '3', '4', '5','6', '7', '8','9', '0', '-','=', 0xe, '?', |
| 11 'q','w','e','r', 't', 'y', 'u','i', 'o', 'p','[', ']', '\n','?', 'a', 's', | |
| 12 'd','f','g','h', 'j', 'k', 'l',';', '\'', '?','?', '?', 'z','x', 'c', 'v', | |
| 13 'b','n','m',',', '.', '/', '?','?', '?', ' ','?', '?', '?','?', '?', '?', | |
| 14 | |
| 15 '?','?','?','?', '?', '?', '?','?', '?', '?','?', '?', '?','?', '?', '?', | |
| 16 '?','?','?','?', '?', '?', '?','?', '?', '?','?', '?', '?','?', '?', '?', | |
| 17 '?','?','?','?', '?', '?', '?','?', '?', '?','?', '?', '?','?', '?', '?', | |
| 18 '?','?','?','?', '?', '?', '?','?', '?', '?','?', '?', '?','?', '?', '?' | |
| 19 }; | |
| 20 | |
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21 static char keymapUPPER[128] = |
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22 { |
| 24 | 23 '?','?','!','@', '#', '$', '%','^', '&', '*','(', ')', '_','+', '?', '?', |
| 24 'Q','W','E','R', 'T', 'Y', 'U','I', 'O', 'P','{', '}', '|','?', 'A', 'S', | |
| 25 'D','F','G','H', 'J', 'K', 'L',':', '"', '?','?', '?', 'Z','X', 'C', 'V', | |
| 26 'B','N','M','<', '>', '?', '?','?', '?', ' ','?', '?', '?','?', '?', '?', | |
| 27 | |
| 28 '?','?','?','?', '?', '?', '?','?', '?', '?','?', '?', '?','?', '?', '?', | |
| 29 '?','?','?','?', '?', '?', '?','?', '?', '?','?', '?', '?','?', '?', '?', | |
| 30 '?','?','?','?', '?', '?', '?','?', '?', '?','?', '?', '?','?', '?', '?', | |
| 31 '?','?','?','?', '?', '?', '?','?', '?', '?','?', '?', '?','?', '?', '?' | |
| 32 }; | |
| 33 | |
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34 void keyboard_init() |
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35 { |
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36 shiftstate = 0; |
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37 charAvail = 0; |
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38 } |
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39 |
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40 void keyboardDriverUpdate() |
| 24 | 41 { |
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42 unsigned char scancode = inb(0x60); |
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43 |
| 24 | 44 switch(scancode) { |
| 45 case 0x2a: | |
| 46 shiftstate = 1; | |
| 47 break; | |
| 48 case 0xaa: | |
| 49 shiftstate = 0; | |
| 50 break; | |
| 51 default: | |
| 52 if (scancode < 128) { | |
| 53 if (charAvail == 0) { | |
| 54 if (shiftstate == 0) { | |
| 55 kbdchar = keymap[scancode]; | |
| 56 } else { | |
| 57 kbdchar = keymapUPPER[scancode]; | |
| 58 } | |
| 59 | |
| 60 charAvail = 1; | |
| 61 } | |
| 62 } else { | |
| 63 // Key release | |
| 64 //printf("Unhandled scancode: 0x%x\n", scancode); | |
| 65 } | |
| 66 break; | |
| 67 } | |
| 68 } | |
| 69 | |
| 70 char getChar() | |
| 71 { | |
| 72 while (charAvail == 0); | |
| 73 char c = kbdchar; | |
| 74 charAvail = 0; | |
| 75 return c; | |
| 76 } | |
| 77 | |
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78 // Move to user code: |
| 24 | 79 void getline(char *buffer, int len) |
| 80 { | |
| 81 char c; | |
| 82 int i = 0; | |
| 83 while (i < len-1) { | |
| 84 c = getChar(); | |
| 85 //printf("%x", c); | |
| 86 if (c == '\n') { | |
| 87 // Enter | |
| 88 break; | |
| 89 } | |
| 90 if (c == 0x0e) | |
| 91 { | |
| 92 // Backspace | |
| 93 if (i>0) | |
| 94 { | |
| 95 int r, c; | |
| 96 get_cursor(&r, &c); | |
| 97 set_cursor(r, c - 1); | |
| 98 printf(" "); | |
| 99 set_cursor(r, c - 1); | |
| 100 i--; | |
| 101 } | |
| 102 continue; | |
| 103 } | |
| 104 buffer[i] = c; | |
| 105 printf("%c", c); | |
| 106 i++; | |
| 107 } | |
| 108 buffer[i] = 0; | |
| 109 } | |
| 110 |