root / lab4 / utils.c @ 305
History | View | Annotate | Download (757 Bytes)
| 1 | 53 | up20180655 | #include <lcom/lcf.h> |
|---|---|---|---|
| 2 | |||
| 3 | 68 | up20180642 | #include "utils.h" |
| 4 | |||
| 5 | 53 | up20180655 | #include <stdint.h> |
| 6 | 68 | up20180642 | #include "errors.h" |
| 7 | 53 | up20180655 | |
| 8 | 64 | up20180642 | int(util_get_LSB)(uint16_t val, uint8_t *lsb) {
|
| 9 | 68 | up20180642 | if (lsb == NULL) return NULL_PTR; |
| 10 | 64 | up20180642 | *lsb = val; |
| 11 | 68 | up20180642 | return SUCCESS;
|
| 12 | 64 | up20180642 | } |
| 13 | |||
| 14 | int(util_get_MSB)(uint16_t val, uint8_t *msb) {
|
||
| 15 | 68 | up20180642 | if (msb == NULL) return NULL_PTR; |
| 16 | 64 | up20180642 | *msb = (val >> 8);
|
| 17 | 68 | up20180642 | return SUCCESS;
|
| 18 | 64 | up20180642 | } |
| 19 | |||
| 20 | #ifdef LAB3
|
||
| 21 | uint32_t sys_inb_counter = 0;
|
||
| 22 | #endif
|
||
| 23 | |||
| 24 | 53 | up20180655 | int (util_sys_inb)(int port, uint8_t *value) { |
| 25 | 68 | up20180642 | if(value == NULL) return NULL_PTR; |
| 26 | 53 | up20180655 | uint32_t n = 0;
|
| 27 | 68 | up20180642 | if(sys_inb(port, &n)) return READ_ERROR; |
| 28 | 53 | up20180655 | *value = n; |
| 29 | 64 | up20180642 | #ifdef LAB3
|
| 30 | ++sys_inb_counter; |
||
| 31 | #endif
|
||
| 32 | 68 | up20180642 | return SUCCESS;
|
| 33 | 53 | up20180655 | } |
| 34 | 79 | up20180655 | |
| 35 | int16_t abs16(int16_t x) {
|
||
| 36 | return (x >= 0) ? (int16_t)(x) : (int16_t)(-x); |
||
| 37 | } |