hidboot.cpp

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/* Copyright (C) 2011 Circuits At Home, LTD. All rights reserved.

This software may be distributed and modified under the terms of the GNU
General Public License version 2 (GPL2) as published by the Free Software
Foundation and appearing in the file GPL2.TXT included in the packaging of
this file. Please note that GPL2 Section 2[b] requires that all works based
on this software must also be made publicly available under the terms of
the GPL2 ("Copyleft").

Contact information
-------------------

Circuits At Home, LTD
Web      :  http://www.circuitsathome.com
e-mail   :  support@circuitsathome.com
*/
#include "hidboot.h"

void MouseReportParser::Parse(HID *hid, bool is_rpt_id, uint8_t len, uint8_t *buf)
{
    MOUSEINFO   *pmi = (MOUSEINFO*)buf;

    if (prevState.mouseInfo.bmLeftButton == 0 && pmi->bmLeftButton == 1)
        OnLeftButtonDown(pmi);

    if (prevState.mouseInfo.bmLeftButton == 1 && pmi->bmLeftButton == 0)
        OnLeftButtonUp(pmi);

    if (prevState.mouseInfo.bmRightButton == 0 && pmi->bmRightButton == 1)
        OnRightButtonDown(pmi);

    if (prevState.mouseInfo.bmRightButton == 1 && pmi->bmRightButton == 0)
        OnRightButtonUp(pmi);

    if (prevState.mouseInfo.bmMiddleButton == 0 && pmi->bmMiddleButton == 1)
        OnMiddleButtonDown(pmi);

    if (prevState.mouseInfo.bmMiddleButton == 1 && pmi->bmMiddleButton == 0)
        OnMiddleButtonUp(pmi);

    if (prevState.mouseInfo.dX != pmi->dX || prevState.mouseInfo.dY != pmi->dY)
        OnMouseMove(pmi);

    for (uint8_t i=0; i<3; i++)
        prevState.bInfo[i] = buf[i];
};

void KeyboardReportParser::Parse(HID *hid, bool is_rpt_id, uint8_t len, uint8_t *buf)
{
    // On error - return
    if (buf[2] == 1)
        return;

    KBDINFO *pki = (KBDINFO*)buf;

    for (uint8_t i=2; i<8; i++)
    {
        bool down = false;
        bool up   = false;

        for (uint8_t j=2; j<8; j++)
        {
            if (buf[i] == prevState.bInfo[j] && buf[i] != 1)
                down = true;
            if (buf[j] == prevState.bInfo[i] && prevState.bInfo[i] != 1)
                up = true;
        }
        if (!down)
        {
            HandleLockingKeys(hid, buf[i]);
            OnKeyDown(*buf, buf[i]);
        }
        if (!up)
            OnKeyUp(prevState.bInfo[0], prevState.bInfo[i]);
    }
    for (uint8_t i=0; i<8; i++)
        prevState.bInfo[i] = buf[i];
};

uint8_t KeyboardReportParser::HandleLockingKeys(HID *hid, uint8_t key)
{
    uint8_t old_keys = kbdLockingKeys.bLeds;

    switch (key)
    {
    case KEY_NUM_LOCK:
        kbdLockingKeys.kbdLeds.bmNumLock = ~kbdLockingKeys.kbdLeds.bmNumLock;
        break;
    case KEY_CAPS_LOCK:
        kbdLockingKeys.kbdLeds.bmCapsLock = ~kbdLockingKeys.kbdLeds.bmCapsLock;
        break;
    case KEY_SCROLL_LOCK:
        kbdLockingKeys.kbdLeds.bmScrollLock = ~kbdLockingKeys.kbdLeds.bmScrollLock;
        break;
    }

    if (old_keys != kbdLockingKeys.bLeds && hid)
            return (hid->SetReport(0, 0/*hid->GetIface()*/, 2, 0, 1, &kbdLockingKeys.bLeds));
    
    return 0;
}

const uint8_t KeyboardReportParser::numKeys[]   PROGMEM = { '!', '@', '#', '$', '%', '^', '&', '*', '(', ')' };
const uint8_t KeyboardReportParser::symKeysUp[] PROGMEM = { '_', '+', '{', '}', '|', '~', ':', '"', '~', '<', '>', '?' };
const uint8_t KeyboardReportParser::symKeysLo[] PROGMEM = { '-', '=', '[', ']', '\\', ' ', ';', '\'', '`', ',', '.', '/' };
const uint8_t KeyboardReportParser::padKeys[]   PROGMEM = { '/', '*', '-', '+', 0x13 };

uint8_t KeyboardReportParser::OemToAscii(uint8_t mod, uint8_t key)
{
    uint8_t shift = (mod & 0x22);

    // [a-z]
    if (key > 0x03 && key < 0x1e)
    {
        // Upper case letters
        if ( (kbdLockingKeys.kbdLeds.bmCapsLock == 0 && (mod & 2)) ||
             (kbdLockingKeys.kbdLeds.bmCapsLock == 1 && (mod & 2) == 0) )
            return (key - 4 + 'A');

        // Lower case letters
        else
            return (key - 4 + 'a');
    }
    // Numbers
    else if (key > 0x1d && key < 0x27)
    {
        if (shift)
            return ((uint8_t)pgm_read_byte(&numKeys[key - 0x1e]));
        else
            return (key - 0x1e + '1');
    }
    // Keypad Numbers
    else if (key > 0x58 && key < 0x62)
    {
        if (kbdLockingKeys.kbdLeds.bmNumLock == 1)
            return (key - 0x59 + '1');
    }
    else if (key > 0x2c && key < 0x39)
        return ((shift) ? (uint8_t)pgm_read_byte(&symKeysUp[key-0x2d]) : (uint8_t)pgm_read_byte(&symKeysLo[key-0x2d]));
    else if (key > 0x53 && key < 0x59)
        return (uint8_t)pgm_read_byte(&padKeys[key - 0x54]);
    else
    {
        switch (key)
        {
        case KEY_SPACE:     return(0x20);
        case KEY_ENTER:     return(0x13);
        case KEY_ZERO:      return((shift) ? ')' : '0');
        case KEY_ZERO2:     return((kbdLockingKeys.kbdLeds.bmNumLock == 1) ? '0' : 0);
        case KEY_PERIOD:    return((kbdLockingKeys.kbdLeds.bmNumLock == 1) ? '.' : 0);
        }
    }
    return( 0 );
}