root / lab3 / kbc_func.h @ 47
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#ifndef _KBC_FUNC_H_
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#define _KBC_FUNC_H_
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#include <stdint.h> |
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#define GET 0 /* @brief Argument to get counter without incrementing */ |
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#define INCREMENT 1 /* @brief Argument for incrementing counter */ |
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/**
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* @brief Subscribes KBC Interrupts and disables Minix Default Keyboard IH
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* @param interrupt_bit Bit of Interrupt Vector that will be set when KBC Interrupt is pending
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* @param interrupt_id KBC Interrupt ID to specify the KBC Interrupt in other calls
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* @return Whether operation was sucessful or not
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*/
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int (subscribe_kbc_interrupt)(uint8_t interrupt_bit, int *interrupt_id); |
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/**
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* @brief Unsubcribes Interrupts
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* @param interrupt_id Interrupt ID, value via arguments on subscription of the interrupt_id
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* @see subscribe_kbc_interrupt, subscribe_timer_interrupt
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* @return Whether operation was sucessful or not
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*/
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int (unsubscribe_interrupt)(int *interrupt_id); |
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/**
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* @brief KBC Interrupt Handler
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*/
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void (kbc_ih)(void); |
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/**
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* @brief High-level function that polls keyboard for scancode
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* High-level function that polls keyboard for scancode of up to 2 bytes. If
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* scancode has only 1 byte, the second byte is set to 0x00.
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* @param bytes Array of at least 2 bytes to store scancode
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* @param size Size of scancode in bytes
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* @return 0 if operation was successful, 1 otherwise
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*/
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int (kbd_poll)(uint8_t bytes[], uint8_t *size);
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/**
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* @brief High-level function that reads the command byte of the KBC
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* @param cmd Pointer to variable where command byte read from KBC will be stored
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* @return 0 if operation was successful, 1 otherwise
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*/
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int (kbc_read_cmd)(uint8_t *cmd);
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/**
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* @brief High-level function that changes the command byte of the KBC
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* @param cmd New value for command byte of KBC
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* @return 0 if operation was successful, 1 otherwise
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*/
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int (kbc_change_cmd)(uint8_t cmd);
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/**
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* @brief High-level function that restores KBC to normal state
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* High-level function that restores KBC to normal state, because lcf_start
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* changes the command byte of KBC. If this function is not used, there is a
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* chance that the keyboard and keyboard interrupts remain disabled.
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* @return 1 if operation was successful, 1 otherwise
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*/
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int (kbc_restore_kbd)();
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/**
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* @brief Low-level function to issue a command to keyboard
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* @param cmd command to be issued
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* @return 0 if operation was successful, 1 otherwise
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*/
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int (kbc_issue_cmd)(uint8_t cmd);
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/**
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* @brief Low-level function for reading byte from keyboard
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* Low-level function for reading byte from keyboard. Waits until output buffer
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* is full
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* @param value Pointer to variable where byte read from keyboard will be stored
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* @return 0 if operation was successful, 1 otherwise
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*/
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int (kbc_read_byte)(uint8_t *byte);
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#endif
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