root / lab4 / kbc.h @ 64
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| 1 | 58 | up20180642 | #ifndef _KBC_FUNC_H_
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| 2 | #define _KBC_FUNC_H_
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| 3 | 53 | up20180655 | |
| 4 | 58 | up20180642 | #include <stdint.h> |
| 5 | 53 | up20180655 | |
| 6 | 58 | up20180642 | #define GET 0 /* @brief Argument to get counter without incrementing */ |
| 7 | #define INCREMENT 1 /* @brief Argument for incrementing counter */ |
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| 8 | 53 | up20180655 | |
| 9 | 58 | up20180642 | /**
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| 10 | * @brief Subscribes KBC Interrupts and disables Minix Default Keyboard IH
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| 11 | * @param interrupt_bit Bit of Interrupt Vector that will be set when KBC Interrupt is pending
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| 12 | * @param interrupt_id KBC Interrupt ID to specify the KBC Interrupt in other calls
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| 13 | * @return Whether operation was sucessful or not
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| 14 | */
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| 15 | int (subscribe_kbc_interrupt)(uint8_t interrupt_bit, int *interrupt_id); |
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| 16 | 53 | up20180655 | |
| 17 | 58 | up20180642 | /**
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| 18 | * @brief Unsubcribes Interrupts
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| 19 | * @param interrupt_id Interrupt ID, value via arguments on subscription of the interrupt_id
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| 20 | * @see subscribe_kbc_interrupt, subscribe_timer_interrupt
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| 21 | * @return Whether operation was sucessful or not
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| 22 | */
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| 23 | int (unsubscribe_interrupt)(int *interrupt_id); |
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| 24 | 53 | up20180655 | |
| 25 | 58 | up20180642 | /**
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| 26 | * @brief KBC Interrupt Handler
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| 27 | */
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| 28 | void (kbc_ih)(void); |
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| 29 | 53 | up20180655 | |
| 30 | 58 | up20180642 | /**
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| 31 | * @brief High-level function that polls keyboard for scancode
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| 32 | * High-level function that polls keyboard for scancode of up to 2 bytes. If
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| 33 | * scancode has only 1 byte, the second byte is set to 0x00.
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| 34 | * @param bytes Array of at least 2 bytes to store scancode
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| 35 | * @param size Size of scancode in bytes
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| 36 | * @return 0 if operation was successful, 1 otherwise
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| 37 | */
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| 38 | int (kbd_poll)(uint8_t bytes[], uint8_t *size);
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| 39 | 53 | up20180655 | |
| 40 | 58 | up20180642 | /**
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| 41 | * @brief High-level function that reads the command byte of the KBC
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| 42 | * @param cmd Pointer to variable where command byte read from KBC will be stored
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| 43 | * @return 0 if operation was successful, 1 otherwise
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| 44 | */
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| 45 | int (kbc_read_cmd)(uint8_t *cmd);
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| 46 | 53 | up20180655 | |
| 47 | 58 | up20180642 | /**
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| 48 | * @brief High-level function that changes the command byte of the KBC
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| 49 | * @param cmd New value for command byte of KBC
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| 50 | * @return 0 if operation was successful, 1 otherwise
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| 51 | */
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| 52 | int (kbc_change_cmd)(uint8_t cmd);
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| 53 | 53 | up20180655 | |
| 54 | 58 | up20180642 | /**
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| 55 | * @brief High-level function that restores KBC to normal state
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| 56 | * High-level function that restores KBC to normal state, because lcf_start
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| 57 | * changes the command byte of KBC. If this function is not used, there is a
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| 58 | * chance that the keyboard and keyboard interrupts remain disabled.
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| 59 | * @return 1 if operation was successful, 1 otherwise
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| 60 | */
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| 61 | int (kbc_restore_kbd)();
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| 62 | 53 | up20180655 | |
| 63 | 58 | up20180642 | /**
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| 64 | * @brief Low-level function to issue a command to keyboard
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| 65 | * @param cmd command to be issued
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| 66 | * @return 0 if operation was successful, 1 otherwise
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| 67 | */
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| 68 | int (kbc_issue_cmd)(uint8_t cmd);
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| 69 | 53 | up20180655 | |
| 70 | 58 | up20180642 | /**
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| 71 | * @brief Low-level function for reading byte from keyboard
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| 72 | * Low-level function for reading byte from keyboard. Waits until output buffer
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| 73 | * is full
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| 74 | * @param value Pointer to variable where byte read from keyboard will be stored
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| 75 | * @return 0 if operation was successful, 1 otherwise
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| 76 | */
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| 77 | int (kbc_read_byte)(uint8_t *byte);
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| 78 | 53 | up20180655 | |
| 79 | |||
| 80 | #endif |