Jordan Earls / PS2_MbedConsole

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Dependents:   MbedConsole

Fork of PS2 by Shinichiro Nakamura

PS2Mouse.cpp@2:a57bbbec16b1, 2010-09-29 (annotated)

Committer:
shintamainjp
Date:
Wed Sep 29 22:15:03 2010 +0000
Revision:
2:a57bbbec16b1
Parent:
1:823c2798e398 

        

        
Who changed what in which revision?

        

            
                
UserRevisionLine numberNew contents of line

            
            


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/**





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 * PS/2 mouse interface control class (Version 0.0.1)





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 *





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 * Copyright (C) 2010 Shinichiro Nakamura (CuBeatSystems)





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 * http://shinta.main.jp/





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 */





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#include "PS2Mouse.h"





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PS2Mouse::PS2Mouse(PinName clk_pin, PinName dat_pin)





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        : ps2ms_init(clk_pin, dat_pin), ps2ms(clk_pin, dat_pin) {





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    cnt = 0;





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}





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PS2Mouse::~PS2Mouse() {





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}





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bool PS2Mouse::processing(mouse_event_t *p) {





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    bool emit = false;





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    for (int i = 0; i < 4; i++) {





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        const int c = ps2ms.getc();





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        if (0 <= c) {





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            switch (cnt % 4) {





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                case 0:





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                    mi.byte1.byte = c;





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                    /*





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                     * Check and reset a buffer if state is wrong.





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                     */





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                    if (mi.byte1.bit.always1 == 0) {





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                        cnt = 0;





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                        while (0 <= ps2ms.getc()) {





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                        }





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                    }





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                    break;





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                case 1:





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                    mi.byte2.byte = c;





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                    break;





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                case 2:





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                    mi.byte3.byte = c;





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                    break;





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                case 3:





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                    mi.byte4.byte = c;





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                    /*





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                     * Store a event data.





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                     */





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                    p->left = mi.byte1.bit.btnLeft ? true : false;





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                    p->center = mi.byte1.bit.btnCenter ? true : false;





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                    p->right = mi.byte1.bit.btnRight ? true : false;





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                    p->x = mi.byte1.bit.signX ? (-256 + mi.byte2.byte) : mi.byte2.byte;





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                    p->y = mi.byte1.bit.signY ? (-256 + mi.byte3.byte) : mi.byte3.byte;





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                    p->z = mi.byte4.bit.signZ ? (-128 + mi.byte4.bit.value) : mi.byte4.bit.value;





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                    emit = true;





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                    break;





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            }





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            cnt++;





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        }





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    }





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    return emit;





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}