USB_Host_Shield_2.0/hidboot.cpp

/* 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 );
}