Revision 61
changes
| lab3/kbc.c | ||
|---|---|---|
| 43 | 43 |
return 1; |
| 44 | 44 |
} |
| 45 | 45 |
|
| 46 |
int (kbc_issue_arg)(uint8_t arg){
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|
| 47 |
uint8_t stat; |
|
| 48 |
for(int i = 0; i < KBC_NUM_TRIES; ++i){
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|
| 49 |
if(util_sys_inb(STATUS_REG, &stat)) return 1; |
|
| 50 |
if((stat&IN_BUF_FULL) == 0){
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|
| 51 |
if(sys_outb(KBC_CMD_ARG, arg)) return 1; |
|
| 52 |
return 0; |
|
| 53 |
} |
|
| 54 |
tickdelay(micros_to_ticks(DELAY)); |
|
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} |
|
| 56 |
return 1; |
|
| 57 |
} |
|
| 58 |
|
|
| 46 | 59 |
int (kbc_read_byte)(uint8_t *byte){
|
| 47 | 60 |
uint8_t stat; |
| 48 | 61 |
while(true){
|
| lab3/kbc.h | ||
|---|---|---|
| 45 | 45 |
int (kbc_issue_cmd)(uint8_t cmd); |
| 46 | 46 |
|
| 47 | 47 |
/** |
| 48 |
* @brief Low-level function to issue an argument of a command |
|
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* @param cmd argument to be issued |
|
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* @return 0 if operation was successful, 1 otherwise |
|
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*/ |
|
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int (kbc_issue_arg)(uint8_t arg); |
|
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|
|
| 54 |
/** |
|
| 48 | 55 |
* @brief Low-level function for reading byte from keyboard |
| 49 | 56 |
* Low-level function for reading byte from keyboard. Waits until output buffer |
| 50 | 57 |
* is full |
| lab3/keyboard.c | ||
|---|---|---|
| 12 | 12 |
return (sys_irqsetpolicy(KBC_IRQ, IRQ_REENABLE | IRQ_EXCLUSIVE, interrupt_id)); |
| 13 | 13 |
} |
| 14 | 14 |
|
| 15 |
int done = 1; |
|
| 16 |
int sz = 1; |
|
| 15 | 17 |
int got_error_keyboard = 0; |
| 16 |
int two_byte_scancode = 0; |
|
| 17 | 18 |
|
| 18 | 19 |
void (kbc_ih)(void) {
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| 20 |
if(done) sz = 1; |
|
| 21 |
else sz++; |
|
| 19 | 22 |
uint8_t status = 0; |
| 20 | 23 |
got_error_keyboard = 0; |
| 21 |
|
|
| 22 | 24 |
if (util_sys_inb(STATUS_REG, &status)) {
|
| 23 | 25 |
got_error_keyboard = 1; |
| 24 | 26 |
return; |
| 25 | 27 |
} |
| 26 |
|
|
| 27 | 28 |
if (status & (TIME_OUT_REC | PARITY_ERROR)) {
|
| 28 | 29 |
got_error_keyboard = 1; |
| 29 | 30 |
return; |
| 30 | 31 |
} |
| 31 |
|
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| 32 |
if ((status & OUT_BUF_FUL) == 0 || (status & AUX_MOUSE) != 0) {
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got_error_keyboard = 1; |
|
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return; |
|
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} |
|
| 32 | 36 |
uint8_t byte = 0; |
| 33 |
|
|
| 34 | 37 |
if (util_sys_inb(OUTPUT_BUF, &byte)) {
|
| 35 | 38 |
got_error_keyboard = 1; |
| 36 | 39 |
return; |
| 37 | 40 |
} |
| 38 |
|
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| 39 |
if (two_byte_scancode) {
|
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| 40 |
scancode[1] = byte; |
|
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two_byte_scancode = 0; |
|
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} else {
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| 43 |
scancode[0] = byte; |
|
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two_byte_scancode = (byte == TWO_BYTE_CODE); |
|
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} |
|
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|
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scancode[sz-1] = byte; |
|
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done = !(TWO_BYTE_CODE == byte); |
|
| 47 | 43 |
} |
| 48 | 44 |
|
| 49 | 45 |
int (keyboard_poll)(uint8_t bytes[], uint8_t *size){
|
| lab3/keyboard.h | ||
|---|---|---|
| 14 | 14 |
int (subscribe_keyboard_interrupt)(uint8_t interrupt_bit, int *interrupt_id); |
| 15 | 15 |
|
| 16 | 16 |
uint8_t scancode[2]; |
| 17 |
int two_byte_scancode; |
|
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int done; |
|
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int sz; |
|
| 18 | 19 |
int got_error_keyboard; |
| 19 | 20 |
|
| 20 | 21 |
/** |
| lab3/lab3.c | ||
|---|---|---|
| 56 | 56 |
case HARDWARE: /* hardware interrupt notification */ |
| 57 | 57 |
if (msg.m_notify.interrupts & kbc_irq) { /* subscribed interrupt */
|
| 58 | 58 |
kbc_ih(); |
| 59 |
if (!(two_byte_scancode || got_error_keyboard)) { /* finished processing a scancode */
|
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if (scancode[0] == TWO_BYTE_CODE) kbd_print_scancode(!(scancode[1] & BREAK_CODE_BIT), 2, scancode); |
|
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else kbd_print_scancode(!(scancode[0] & BREAK_CODE_BIT), 1, scancode); |
|
| 62 |
} else { break; }
|
|
| 63 | 59 |
if(done) |
| 64 | 60 |
kbd_print_scancode(!(scancode[sz-1] & BREAK_CODE_BIT), sz, scancode); |
| 65 | 61 |
if (scancode[0] == ESC_BREAK_CODE) good = 0; |
| ... | ... | |
| 131 | 127 |
} |
| 132 | 128 |
if (msg.m_notify.interrupts & kbc_irq) { /// subscribed interrupt
|
| 133 | 129 |
kbc_ih(); |
| 134 |
|
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| 135 |
if (!(two_byte_scancode || got_error_keyboard)) { /// finished processing a scancode
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| 136 |
if (scancode[0] == TWO_BYTE_CODE) kbd_print_scancode(!(scancode[1] & BREAK_CODE_BIT), 2, scancode); |
|
| 137 |
else kbd_print_scancode(!(scancode[0] & BREAK_CODE_BIT), 1, scancode); |
|
| 138 | 130 |
if(done) {
|
| 139 | 131 |
kbd_print_scancode(!(scancode[sz-1] & BREAK_CODE_BIT), sz, scancode); |
| 140 | 132 |
time = 0; |
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