root / lab3 / keyboard.c @ 64
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| 1 | 60 | up20180642 | #include <lcom/lcf.h> |
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| 2 | |||
| 3 | #include "keyboard.h" |
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| 4 | |||
| 5 | #include "kbc.h" |
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| 6 | #include "kbc_macros.h" |
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| 7 | #include "utils.h" |
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| 8 | |||
| 9 | int (subscribe_keyboard_interrupt)(uint8_t interrupt_bit, int *interrupt_id) { |
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| 10 | if (interrupt_id == NULL) return 1; |
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| 11 | *interrupt_id = interrupt_bit; |
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| 12 | return (sys_irqsetpolicy(KBC_IRQ, IRQ_REENABLE | IRQ_EXCLUSIVE, interrupt_id));
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| 13 | } |
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| 14 | |||
| 15 | 61 | up20180642 | int done = 1; |
| 16 | int sz = 1; |
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| 17 | 60 | up20180642 | int got_error_keyboard = 0; |
| 18 | |||
| 19 | void (kbc_ih)(void) { |
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| 20 | 61 | up20180642 | if(done) sz = 1; |
| 21 | else sz++;
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| 22 | 60 | up20180642 | uint8_t status = 0;
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| 23 | got_error_keyboard = 0;
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| 24 | if (util_sys_inb(STATUS_REG, &status)) {
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| 25 | got_error_keyboard = 1;
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| 26 | return;
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| 27 | } |
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| 28 | if (status & (TIME_OUT_REC | PARITY_ERROR)) {
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| 29 | got_error_keyboard = 1;
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| 30 | return;
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| 31 | } |
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| 32 | 61 | up20180642 | if ((status & OUT_BUF_FUL) == 0 || (status & AUX_MOUSE) != 0) { |
| 33 | got_error_keyboard = 1;
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| 34 | return;
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| 35 | } |
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| 36 | 60 | up20180642 | uint8_t byte = 0;
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| 37 | if (util_sys_inb(OUTPUT_BUF, &byte)) {
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| 38 | got_error_keyboard = 1;
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| 39 | return;
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| 40 | } |
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| 41 | 61 | up20180642 | scancode[sz-1] = byte;
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| 42 | done = !(TWO_BYTE_CODE == byte); |
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| 43 | 60 | up20180642 | } |
| 44 | |||
| 45 | int (keyboard_poll)(uint8_t bytes[], uint8_t *size){
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| 46 | if(bytes == NULL || size == NULL) return 1; |
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| 47 | uint8_t c; |
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| 48 | if(kbc_read_byte(&c)) return 1; |
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| 49 | if(c == TWO_BYTE_CODE){
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| 50 | if(kbc_read_byte(&bytes[1])) return 1; |
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| 51 | bytes[0] = c;
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| 52 | *size = 2;
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| 53 | }else{
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| 54 | bytes[1] = 0; |
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| 55 | bytes[0] = c;
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| 56 | *size = 1;
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| 57 | } |
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| 58 | return 0; |
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| 59 | } |