root / lab3 / kbc.c @ 36
History | View | Annotate | Download (2.09 KB)
| 1 | 30 | up20180655 | #include <lcom/lcf.h> |
|---|---|---|---|
| 2 | |||
| 3 | #include "kbc.h" |
||
| 4 | #include "kbc_func.h" |
||
| 5 | |||
| 6 | int (subscribe_kbc_interrupt)(uint8_t interrupt_bit, int *interrupt_id) { |
||
| 7 | if (interrupt_id == NULL) return 1; |
||
| 8 | *interrupt_id = interrupt_bit; |
||
| 9 | return (sys_irqsetpolicy(KBC_IRQ, IRQ_REENABLE | IRQ_EXCLUSIVE, interrupt_id));
|
||
| 10 | } |
||
| 11 | |||
| 12 | int (unsubscribe_kbc_interrupt)(int *interrupt_id) { |
||
| 13 | if (interrupt_id == NULL) return 1; |
||
| 14 | return sys_irqrmpolicy(interrupt_id);
|
||
| 15 | } |
||
| 16 | |||
| 17 | uint8_t scancode[2];
|
||
| 18 | int two_byte_scancode = 0; |
||
| 19 | 31 | up20180655 | int got_error = 0; |
| 20 | 30 | up20180655 | |
| 21 | void (kbc_ih)(void) { |
||
| 22 | uint8_t status = 0;
|
||
| 23 | 31 | up20180655 | got_error = 0;
|
| 24 | 30 | up20180655 | |
| 25 | #ifdef LAB3
|
||
| 26 | sys_inb_counter(INCREMENT); |
||
| 27 | #endif
|
||
| 28 | |||
| 29 | 31 | up20180655 | if (util_sys_inb(STATUS_REG, &status)) {
|
| 30 | got_error = 1;
|
||
| 31 | return;
|
||
| 32 | } |
||
| 33 | 30 | up20180655 | |
| 34 | 31 | up20180655 | if (status & (TIME_OUT_REC | PARITY_ERROR)) {
|
| 35 | got_error = 1;
|
||
| 36 | return;
|
||
| 37 | } |
||
| 38 | 30 | up20180655 | |
| 39 | #ifdef LAB3
|
||
| 40 | sys_inb_counter(INCREMENT); |
||
| 41 | #endif
|
||
| 42 | |||
| 43 | uint8_t byte = 0;
|
||
| 44 | |||
| 45 | 31 | up20180655 | if (util_sys_inb(OUTPUT_BUF, &byte)) {
|
| 46 | got_error = 1;
|
||
| 47 | return;
|
||
| 48 | } |
||
| 49 | 30 | up20180655 | |
| 50 | if (two_byte_scancode) {
|
||
| 51 | scancode[1] = byte;
|
||
| 52 | two_byte_scancode = 0;
|
||
| 53 | } else {
|
||
| 54 | scancode[0] = byte;
|
||
| 55 | two_byte_scancode = (byte == TWO_BYTE_CODE); |
||
| 56 | } |
||
| 57 | |||
| 58 | } |
||
| 59 | |||
| 60 | 31 | up20180655 | uint32_t (sys_inb_counter)(int increment) {
|
| 61 | 30 | up20180655 | static uint32_t counter = 0; |
| 62 | if (increment) return ++counter; |
||
| 63 | return counter;
|
||
| 64 | } |
||
| 65 | 36 | up20180642 | |
| 66 | int (kbd_poll)(uint8_t bytes[], uint8_t *size){
|
||
| 67 | if(bytes == NULL || size == NULL) return 1; |
||
| 68 | uint8_t c; |
||
| 69 | if(kbd_read_byte(&c)) return 1; |
||
| 70 | if(c == TWO_BYTE_CODE){
|
||
| 71 | if(kbd_read_byte(&bytes[0])) return 1; |
||
| 72 | bytes[1] = c;
|
||
| 73 | *size = 2;
|
||
| 74 | }else{
|
||
| 75 | bytes[1] = 0; |
||
| 76 | bytes[0] = c;
|
||
| 77 | *size = 1;
|
||
| 78 | } |
||
| 79 | return 0; |
||
| 80 | } |
||
| 81 | |||
| 82 | int (kbd_read_byte)(uint8_t *value){
|
||
| 83 | uint8_t stat; |
||
| 84 | while(1){ |
||
| 85 | if(util_sys_inb(STATUS_REG, &stat)) return 1; |
||
| 86 | if((stat&OUT_BUF_FUL) && ((stat&AUX_MOUSE)^AUX_MOUSE)){
|
||
| 87 | if(stat & (PARITY_ERROR | TIME_OUT_REC)) return 1; |
||
| 88 | else return util_sys_inb(OUTPUT_BUF, value); |
||
| 89 | } |
||
| 90 | tickdelay(micros_to_ticks(DELAY)); |
||
| 91 | } |
||
| 92 | } |