mouse_ps2.h

#include "device.h"


namespace MOSS { namespace Input { namespace Devices {


//http://forum.osdev.org/viewtopic.php?t=10247
//http://houbysoft.com/download/ps2mouse.html (essentially the same?)
//http://wiki.osdev.org/Mouse_Input (also see http://wiki.osdev.org/PS/2_Mouse)

class ControllerPS2;

class DevicePS2Mouse : public DevicePS2Base {
    private:
        int mouse_cycle;

        //http://www.computer-engineering.org/ps2mouse/
        union {
            struct {
                bool      button_left : 1;
                bool     button_right : 1;
                bool    button_middle : 1;
                bool           unused : 1; //Should be 1
                uint32_t  dx_sign_bit : 1; //Two's complement
                uint32_t  dy_sign_bit : 1; //Two's complement
                bool    dx_overflowed : 1;
                bool    dy_overflowed : 1;
                uint32_t           dx : 8;
                uint32_t           dy : 8;
                //See http://wiki.osdev.org/Mouse_Input#Formats_of_Optional_4th_Packet_Byte
                int32_t       dwheel : 4; //Only exists and valid for Intellimouse Extensions
                bool        button_4 : 1; //Only exists and valid for Intellimouse Extensions (and only iff initialized extra)
                bool        button_5 : 1; //Only exists and valid for Intellimouse Extensions (and only iff initialized extra)
                uint8_t mostly_zero1 : 1; //Only exists for Intellimouse Extensions
                uint8_t mostly_zero2 : 1; //Only exists for Intellimouse Extensions
            };
            struct {
                uint32_t      byte1 : 8;
                uint32_t      byte2 : 8;
                uint32_t      byte3 : 8;
                uint32_t      byte4 : 8; //Only exists for Intellimouse Extensions
            };
        } received_data;

    public:
        int x,y;
        int last_x,last_y;

    public:
        DevicePS2Mouse(ControllerPS2* controller);
        virtual ~DevicePS2Mouse(void);

        void reset(void);

        void  enable(void);
        void disable(void);

        void send_command_device(uint8_t command);
        void wait_response(uint8_t wait_byte=0xFA);

    private:
        void _handle_current_packet(void);
    public:
        void handle_irq(void) override;

        void set_position(int x, int y);
};


}}}