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#ifndef PS2_H
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#define PS2_H
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/**
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 * @file
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 * @brief PS/2 mouse and keyboard support.
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 * @author http://www.nedopc.com
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 *
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 * PS/2 keyboard support (read only).
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 *
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 * PS/2 mouse support (read/write).
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 * ZX Kempston mouse interface emulation.
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 *
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 * Support PS/2 mouses:
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 * - "microsoft" mouses with wheel (4bytes data);
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 * - classic mouses (3bytes data).
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 */
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/**
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 * Decode received data.
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 * @return decoded data.
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 * @param count - counter.
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 * @param shifter - received bits.
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 */
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UBYTE ps2_decode(UBYTE count, UWORD shifter);
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/**
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 * Encode (prepare) sended data.
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 * @return encoded data.
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 * @param data - data to send.
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 */
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UWORD ps2_encode(UBYTE data);
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/** Timeout value for PS/2 keyboard. */
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#define PS2KEYBOARD_TIMEOUT 20
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/** Command to reset PS2 keyboard. */
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#define PS2KEYBOARD_CMD_RESET 0xFF
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/** Command to enable PS2 keyboard. */
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#define PS2KEYBOARD_CMD_ENABLE 0xF4
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/** Command to set leds on PS2 keyboard. */
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#define PS2KEYBOARD_CMD_SETLED 0xED
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/** "Caps Lock" led bit in set leds command on PS2 keyboard. */
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#define PS2KEYBOARD_LED_CAPSLOCK 0x04
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/** "Num Lock" led bit in set leds command on PS2 keyboard. */
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#define PS2KEYBOARD_LED_NUMLOCK 0x02
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/** "Scroll Lock" led bit in set leds command on PS2 keyboard. */
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#define PS2KEYBOARD_LED_SCROLLOCK 0x01
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/** Received PS/2 keyboard data register. */
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extern volatile UWORD ps2keyboard_shifter;
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/** Counter of current PS/2 keyboard data bit. */
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extern volatile UBYTE ps2keyboard_count;
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/** Timeout register for detecting PS/2 keyboard timeouts. */
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extern volatile UBYTE ps2keyboard_timeout;
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/** Counter of stages PS/2 keyboard command. */
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extern volatile UBYTE ps2keyboard_cmd_count;
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/** Current PS/2 keyboard command (0 - none). */
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extern volatile UBYTE ps2keyboard_cmd;
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/** Reset PS2 keyboard log. */
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void ps2keyboard_reset_log(void);
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/**
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 * Get data from PS2 keyboard log.
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 * @return data byte (0 - log empty, 0xFF - log overload).
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 */
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UBYTE ps2keyboard_from_log(void);
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/**
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 * Send command to PS/2 keboard.
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 * @param cmd [in] - command.
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 */
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void ps2keyboard_send_cmd(UBYTE cmd);
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/** PS/2 keyboard task. */
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void ps2keyboard_task(void);
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/**
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 * Parsing PS/2 keboard recived bytes .
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 * @param recbyte [in] - received byte.
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 */
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void ps2keyboard_parse(UBYTE recbyte);
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/** Timeout for waiting response from mouse. */
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#define PS2MOUSE_TIMEOUT 20
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/** Received/sended PS/2 mouse data register. */
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extern volatile UWORD ps2mouse_shifter;
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/** Counter of current PS/2 mouse data bit. */
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extern volatile UBYTE ps2mouse_count;
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/** Timeout register for detecting PS/2 mouse timeouts. */
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extern volatile UBYTE ps2mouse_timeout;
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/** Index of PS/2 mouse initialization step (@see ps2mouse_init_sequence). */
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extern volatile UBYTE ps2mouse_initstep;
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/** Counter of PS/2 mouse response bytes. */
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extern volatile UBYTE ps2mouse_resp_count;
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/** Current PS/2 keyboard command (0 - none). */
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extern volatile UBYTE ps2mouse_cmd;
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/** Command to reset PS2 mouse. */
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#define PS2MOUSE_CMD_RESET          0xFF
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/** Command get type of PS2 mouse. */
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#define PS2MOUSE_CMD_GET_TYPE       0xF2
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/** Command to set resolution PS2 mouse. */
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#define PS2MOUSE_CMD_SET_RESOLUTION 0xE8
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/** PS/2 mouse task. */
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void ps2mouse_task(void);
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/**
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 * Set PS/2 mouse resolution.
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 * If left and right mouse buttons and some keyboard button pressed then resolution set.
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 * @param code [in] - control codes:
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 *        <B>0x7C</B> (keypad '*') - set default resolution;
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 *        <B>0x79</B> (keypad '+') - inc resolution;
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 *        <B>0x7B</B> (keypad '-') - dec resolution.
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 */
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void ps2mouse_set_resolution(UBYTE code);
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#endif //PS2_H
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