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