root / lab3 / kbc_func.h @ 43
History | View | Annotate | Download (2.74 KB)
| 1 | 30 | up20180655 | #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 KBC Interrupts
|
||
| 19 | * @param interrupt_id KBC Interrupt ID, value via arguments on subscription of the interrupt_id
|
||
| 20 | * @see subscribe_kbc_interrupt
|
||
| 21 | * @return Whether operation was sucessful or not
|
||
| 22 | */
|
||
| 23 | int (unsubscribe_kbc_interrupt)(int *interrupt_id); |
||
| 24 | |||
| 25 | /**
|
||
| 26 | * @brief KBC Interrupt Handler
|
||
| 27 | */
|
||
| 28 | void (kbc_ih)(void); |
||
| 29 | |||
| 30 | /**
|
||
| 31 | 36 | up20180642 | * @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 | 39 | up20180642 | /**
|
| 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 | 38 | up20180642 | |
| 47 | 36 | up20180642 | /**
|
| 48 | 39 | up20180642 | * @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 | 43 | up20180642 | * @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 | 39 | up20180642 | * @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 | 36 | up20180642 | * @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 | 39 | up20180642 | int (kbc_read_byte)(uint8_t *byte);
|
| 78 | 36 | up20180642 | |
| 79 | 38 | up20180642 | |
| 80 | 30 | up20180655 | #endif |