root / lab4 / kbc.h @ 66
History | View | Annotate | Download (2.75 KB)
| 1 |
#ifndef _KBC_FUNC_H_
|
|---|---|
| 2 |
#define _KBC_FUNC_H_
|
| 3 |
|
| 4 |
#include <stdint.h> |
| 5 |
|
| 6 |
#define GET 0 /* @brief Argument to get counter without incrementing */ |
| 7 |
#define INCREMENT 1 /* @brief Argument for incrementing counter */ |
| 8 |
|
| 9 |
/**
|
| 10 |
* @brief Subscribes KBC Interrupts and disables Minix Default Keyboard IH
|
| 11 |
* @param interrupt_bit Bit of Interrupt Vector that will be set when KBC Interrupt is pending
|
| 12 |
* @param interrupt_id KBC Interrupt ID to specify the KBC Interrupt in other calls
|
| 13 |
* @return Whether operation was sucessful or not
|
| 14 |
*/
|
| 15 |
int (subscribe_kbc_interrupt)(uint8_t interrupt_bit, int *interrupt_id); |
| 16 |
|
| 17 |
/**
|
| 18 |
* @brief Unsubcribes Interrupts
|
| 19 |
* @param interrupt_id Interrupt ID, value via arguments on subscription of the interrupt_id
|
| 20 |
* @see subscribe_kbc_interrupt, subscribe_timer_interrupt
|
| 21 |
* @return Whether operation was sucessful or not
|
| 22 |
*/
|
| 23 |
int (unsubscribe_interrupt)(int *interrupt_id); |
| 24 |
|
| 25 |
/**
|
| 26 |
* @brief KBC Interrupt Handler
|
| 27 |
*/
|
| 28 |
void (kbc_ih)(void); |
| 29 |
|
| 30 |
/**
|
| 31 |
* @brief High-level function that polls keyboard for scancode
|
| 32 |
* High-level function that polls keyboard for scancode of up to 2 bytes. If
|
| 33 |
* scancode has only 1 byte, the second byte is set to 0x00.
|
| 34 |
* @param bytes Array of at least 2 bytes to store scancode
|
| 35 |
* @param size Size of scancode in bytes
|
| 36 |
* @return 0 if operation was successful, 1 otherwise
|
| 37 |
*/
|
| 38 |
int (kbd_poll)(uint8_t bytes[], uint8_t *size);
|
| 39 |
|
| 40 |
/**
|
| 41 |
* @brief High-level function that reads the command byte of the KBC
|
| 42 |
* @param cmd Pointer to variable where command byte read from KBC will be stored
|
| 43 |
* @return 0 if operation was successful, 1 otherwise
|
| 44 |
*/
|
| 45 |
int (kbc_read_cmd)(uint8_t *cmd);
|
| 46 |
|
| 47 |
/**
|
| 48 |
* @brief High-level function that changes the command byte of the KBC
|
| 49 |
* @param cmd New value for command byte of KBC
|
| 50 |
* @return 0 if operation was successful, 1 otherwise
|
| 51 |
*/
|
| 52 |
int (kbc_change_cmd)(uint8_t cmd);
|
| 53 |
|
| 54 |
/**
|
| 55 |
* @brief High-level function that restores KBC to normal state
|
| 56 |
* High-level function that restores KBC to normal state, because lcf_start
|
| 57 |
* changes the command byte of KBC. If this function is not used, there is a
|
| 58 |
* chance that the keyboard and keyboard interrupts remain disabled.
|
| 59 |
* @return 1 if operation was successful, 1 otherwise
|
| 60 |
*/
|
| 61 |
int (kbc_restore_kbd)();
|
| 62 |
|
| 63 |
/**
|
| 64 |
* @brief Low-level function to issue a command to keyboard
|
| 65 |
* @param cmd command to be issued
|
| 66 |
* @return 0 if operation was successful, 1 otherwise
|
| 67 |
*/
|
| 68 |
int (kbc_issue_cmd)(uint8_t cmd);
|
| 69 |
|
| 70 |
/**
|
| 71 |
* @brief Low-level function for reading byte from keyboard
|
| 72 |
* Low-level function for reading byte from keyboard. Waits until output buffer
|
| 73 |
* is full
|
| 74 |
* @param value Pointer to variable where byte read from keyboard will be stored
|
| 75 |
* @return 0 if operation was successful, 1 otherwise
|
| 76 |
*/
|
| 77 |
int (kbc_read_byte)(uint8_t *byte);
|
| 78 |
|
| 79 |
|
| 80 |
#endif
|