root / lab5 / kbc.h @ 211
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| 1 | 109 | up20180655 | /**
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| 2 | * This file concerns everything related to the KBC (KeyBoard Controller, which
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| 3 | * actually also manages the mouse)
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| 4 | */
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| 5 | |||
| 6 | #ifndef KBC_H_INCLUDED
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| 7 | #define KBC_H_INCLUDED
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| 8 | |||
| 9 | /**
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| 10 | * @brief Unsubcribes Interrupts
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| 11 | * @param interrupt_id Interrupt ID, value via arguments on subscription of the interrupt_id
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| 12 | * @see subscribe_kbc_interrupt, subscribe_timer_interrupt
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| 13 | * @return Whether operation was sucessful or not
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| 14 | */
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| 15 | int (unsubscribe_interrupt)(int *interrupt_id); |
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| 16 | |||
| 17 | /**
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| 18 | * @brief High-level function that reads the command byte of the KBC
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| 19 | * @param cmd Pointer to variable where command byte read from KBC will be stored
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| 20 | * @return 0 if operation was successful, 1 otherwise
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| 21 | */
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| 22 | int (kbc_read_cmd)(uint8_t *cmd);
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| 23 | |||
| 24 | /**
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| 25 | * @brief High-level function that changes the command byte of the KBC
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| 26 | * @param cmd New value for command byte of KBC
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| 27 | * @return 0 if operation was successful, 1 otherwise
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| 28 | */
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| 29 | int (kbc_change_cmd)(uint8_t cmd);
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| 30 | |||
| 31 | /**
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| 32 | * @brief High-level function that restores KBC to normal state
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| 33 | * High-level function that restores KBC to normal state, because lcf_start
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| 34 | * changes the command byte of KBC. If this function is not used, there is a
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| 35 | * chance that the keyboard and keyboard interrupts remain disabled.
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| 36 | * @return 0 if operation was successful, 1 otherwise
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| 37 | */
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| 38 | int (kbc_restore_keyboard)();
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| 39 | |||
| 40 | /**
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| 41 | * @brief Low-level function to issue a command to keyboard
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| 42 | * @param cmd command to be issued
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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_issue_cmd)(uint8_t cmd);
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| 46 | |||
| 47 | /**
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| 48 | * @brief Low-level function to issue an argument of a command
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| 49 | * @param cmd argument to be issued
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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_issue_arg)(uint8_t arg);
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| 53 | |||
| 54 | /**
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| 55 | * @brief Low-level function for reading byte from keyboard
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| 56 | * Low-level function for reading byte from keyboard. Waits until output buffer
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| 57 | * is full
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| 58 | * @param value Pointer to variable where byte read from keyboard will be stored
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| 59 | * @return 0 if operation was successful, 1 otherwise
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| 60 | */
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| 61 | int (kbc_read_byte)(uint8_t *byte);
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| 62 | |||
| 63 | #endif //KBC_H_INCLUDED |