Revision 31
Minor changes
| kbc.c | ||
|---|---|---|
| 16 | 16 |
|
| 17 | 17 |
uint8_t scancode[2]; |
| 18 | 18 |
int two_byte_scancode = 0; |
| 19 |
int got_error = 0; |
|
| 19 | 20 |
|
| 20 | 21 |
void (kbc_ih)(void) {
|
| 21 | 22 |
uint8_t status = 0; |
| 23 |
got_error = 0; |
|
| 22 | 24 |
|
| 23 | 25 |
#ifdef LAB3 |
| 24 | 26 |
sys_inb_counter(INCREMENT); |
| 25 | 27 |
#endif |
| 26 | 28 |
|
| 27 |
if (util_sys_inb(STATUS_REG, &status)) return; |
|
| 29 |
if (util_sys_inb(STATUS_REG, &status)) {
|
|
| 30 |
got_error = 1; |
|
| 31 |
return; |
|
| 32 |
} |
|
| 28 | 33 |
|
| 29 |
if (status & (TIME_OUT_REC | PARITY_ERROR)) return; |
|
| 34 |
if (status & (TIME_OUT_REC | PARITY_ERROR)) {
|
|
| 35 |
got_error = 1; |
|
| 36 |
return; |
|
| 37 |
} |
|
| 30 | 38 |
|
| 31 | 39 |
#ifdef LAB3 |
| 32 | 40 |
sys_inb_counter(INCREMENT); |
| ... | ... | |
| 34 | 42 |
|
| 35 | 43 |
uint8_t byte = 0; |
| 36 | 44 |
|
| 37 |
if (util_sys_inb(OUTPUT_BUF, &byte)) return; |
|
| 45 |
if (util_sys_inb(OUTPUT_BUF, &byte)) {
|
|
| 46 |
got_error = 1; |
|
| 47 |
return; |
|
| 48 |
} |
|
| 38 | 49 |
|
| 39 | 50 |
if (two_byte_scancode) {
|
| 40 | 51 |
scancode[1] = byte; |
| ... | ... | |
| 46 | 57 |
|
| 47 | 58 |
} |
| 48 | 59 |
|
| 49 |
uint32_t sys_inb_counter(int increment) {
|
|
| 60 |
uint32_t (sys_inb_counter)(int increment) {
|
|
| 50 | 61 |
static uint32_t counter = 0; |
| 51 | 62 |
if (increment) return ++counter; |
| 52 | 63 |
return counter; |
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