/*
 * This software is based on the LUFA library. Modifications of the
 * software are released under GPL but LUFA library itself is copyrigthed
 * by its creator Dean Camera. Refer to the license below on the usage of
 * LUFA library.
 * 
 * Chris Boudacoff @ Olimex Ltd chris <at> protonic <dot> co <dot> uk 
 */

/*
 * LUFA Library Copyright (C) Dean Camera, 2015.
 * 
 * dean [at] fourwalledcubicle [dot] com www.lufa-lib.org 
 */

/*
 * Copyright 2015 Dean Camera (dean [at] fourwalledcubicle [dot] com)
 * 
 * Permission to use, copy, modify, distribute, and sell this software and 
 * its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies and that
 * both that the copyright notice and this permission notice and warranty
 * disclaimer appear in supporting documentation, and that the name of the 
 * author not be used in advertising or publicity pertaining to
 * distribution of the software without specific, written prior
 * permission.
 * 
 * The author disclaims all warranties with regard to this software,
 * including all implied warranties of merchantability and fitness.  In no 
 * event shall the author be liable for any special, indirect or
 * consequential damages or any damages whatsoever resulting from loss of
 * use, data or profits, whether in an action of contract, negligence or
 * other tortious action, arising out of or in connection with the use or
 * performance of this software. 
 */

/** \file
 *
 *  Main source file for the KeyboardMouse demo. This file contains the main tasks of
 *  the demo and is responsible for the initial application hardware configuration.
 */

#include "KeyboardMouse.h"
/** Magic lock for forced application start. If the HWBE fuse is programmed and BOOTRST is unprogrammed, the bootloader
 *  will start if the /HWB line of the AVR is held low and the system is reset. However, if the /HWB line is still held
 *  low when the application attempts to start via a watchdog reset, the bootloader will re-start. If set to the value
 *  \ref MAGIC_BOOT_KEY the special init function \ref Application_Jump_Check() will force the application to start.
 */
uint16_t MagicBootKey ATTR_NO_INIT;

/** Buffer to hold the previously generated Keyboard HID report, for comparison purposes inside the HID class driver. */
static uint8_t 
    PrevKeyboardHIDReportBuffer[sizeof(USB_KeyboardReport_Data_t)];

/** Buffer to hold the previously generated Mouse HID report, for comparison purposes inside the HID class driver. */
static uint8_t 
    PrevMouseHIDReportBuffer[sizeof(USB_WheelMouseReport_Data_t)];

int
limited(int value)
{
    if (value < 0) {
        if (abs(value) > speedlimit)
            return -speedlimit;

    } else {
        if (value > speedlimit)
            return speedlimit;
    }
    return value;
}

/** LUFA HID Class driver interface configuration and state information. This structure is
 *  passed to all HID Class driver functions, so that multiple instances of the same class
 *  within a device can be differentiated from one another. This is for the keyboard HID
 *  interface within the device.
 */
USB_ClassInfo_HID_Device_t Keyboard_HID_Interface = {
    .Config = {
               .InterfaceNumber = INTERFACE_ID_Keyboard,
               .ReportINEndpoint = {
                                    .Address = KEYBOARD_IN_EPADDR,
                                    .Size = HID_EPSIZE,
                                    .Banks = 1,
                                    }
               ,
               .PrevReportINBuffer = PrevKeyboardHIDReportBuffer,
               .PrevReportINBufferSize =
               sizeof(PrevKeyboardHIDReportBuffer),
               }
    ,
};

/** LUFA HID Class driver interface configuration and state information. This structure is
 *  passed to all HID Class driver functions, so that multiple instances of the same class
 *  within a device can be differentiated from one another. This is for the mouse HID
 *  interface within the device.
 */
USB_ClassInfo_HID_Device_t Mouse_HID_Interface = {
    .Config = {
               .InterfaceNumber = INTERFACE_ID_Mouse,
               .ReportINEndpoint = {
                                    .Address = MOUSE_IN_EPADDR,
                                    .Size = HID_EPSIZE,
                                    .Banks = 1,
                                    }
               ,
               .PrevReportINBuffer = PrevMouseHIDReportBuffer,
               .PrevReportINBufferSize = sizeof(PrevMouseHIDReportBuffer),
               }
    ,
};


void
Jump_To_Bootloader(void)
{
    // If USB is used, detach from the bus and reset it
    USB_Disable();

    // Disable all interrupts
    cli();

    // Wait one seconds for the USB detachment to register on the host
    Delay_MS(1000);

    // Set the bootloader key to the magic value and force a reset
    wdt_enable(WDTO_250MS);
    for (;;);
}

void
tp_guarder(void)
{
    tp_guard = true;
    tpguard = TP_LOCK;
}
/** Main program entry point. This routine contains the overall program flow, including initial
 *  setup of all components and the main program loop.
 */
int
main(void)
{
    SetupHardware();
    GlobalInterruptEnable();

    for (;;) {
        HID_Device_USBTask(&Keyboard_HID_Interface);
        DDRE = 0x00;
        PORTE = 0xff;
        PORTB = 0xfd;
        DDRB = 0xff;
        HID_Device_USBTask(&Mouse_HID_Interface);
        USB_USBTask();

        if ((PINE & (1 << 2)) == 0) {
            DDRB = 0xff;
            PORTB = 0xfe;
            Delay_MS(10);
            if ((PINC & (1 << 7)) == 0) {
                PORTB = 0xbf;
                Delay_MS(10);
                if ((PIND & (1 << 4)) == 0)
                    Jump_To_Bootloader();
            }
        }
    }
}

/** Configures the board hardware and chip peripherals for the demo's functionality. */
void
SetupHardware()
{
#if (ARCH == ARCH_AVR8)
    /*
     * Disable watchdog if enabled by bootloader/fuses 
     */
    MCUSR &= ~(1 << WDRF);
    wdt_disable();

    /*
     * Disable clock division 
     */
    clock_prescale_set(clock_div_1);
#elif (ARCH == ARCH_XMEGA)
    /*
     * Start the PLL to multiply the 2MHz RC oscillator to 32MHz and
     * switch the CPU core to run from it 
     */
    XMEGACLK_StartPLL(CLOCK_SRC_INT_RC2MHZ, 2000000, F_CPU);
    XMEGACLK_SetCPUClockSource(CLOCK_SRC_PLL);

    /*
     * Start the 32MHz internal RC oscillator and start the DFLL to
     * increase it to 48MHz using the USB SOF as a reference 
     */
    XMEGACLK_StartInternalOscillator(CLOCK_SRC_INT_RC32MHZ);
    XMEGACLK_StartDFLL(CLOCK_SRC_INT_RC32MHZ, DFLL_REF_INT_USBSOF, F_USB);

    PMIC.CTRL = PMIC_LOLVLEN_bm | PMIC_MEDLVLEN_bm | PMIC_HILVLEN_bm;
#endif

    /*
     * Hardware Initialization 
     */

    // Keyboard init
    DDRB = 0xff;
    PORTB = 0xff;

    DDRD = 0;
    PORTD = 0xfc;

    DDRC = 0;
    PORTC = 0xc0;

    DDRE = 0;
    PORTE = 0x44;

    DDRF = 0;
    PORTF = 0xf2;

    TWI_Init(TWI_BIT_PRESCALE_4,
             TWI_BITLENGTH_FROM_FREQ(TWI_BIT_PRESCALE_4, 100000));
    ADC_Init(ADC_FREE_RUNNING | ADC_PRESCALE_128);
    ADCSRA |= 1 << ADIE;
    MCUCR = 0;
    EIMSK |= 1 << INT2;

    ADC_SetupChannel(0);
    ADC_StartReading(ADC_REFERENCE_AVCC | ADC_LEFT_ADJUSTED |
                     ADC_CHANNEL0);

    // set timer0 counter initial value to 0
    TCNT0 = 0x00;
    // start timer0 with /1024 prescaler
    TCCR0B = (1 << CS02) | (1 << CS00);
    TIMSK0 = 1 << TOIE0;

    USB_Init();
    button = 0xff;
}

/** Event handler for the library USB Connection event. */
void
EVENT_USB_Device_Connect(void)
{

}

/** Event handler for the library USB Disconnection event. */
void
EVENT_USB_Device_Disconnect(void)
{

}

/** Event handler for the library USB Configuration Changed event. */
void
EVENT_USB_Device_ConfigurationChanged(void)
{
    bool            ConfigSuccess = true;

    ConfigSuccess &=
        HID_Device_ConfigureEndpoints(&Keyboard_HID_Interface);
    ConfigSuccess &= HID_Device_ConfigureEndpoints(&Mouse_HID_Interface);
    USB_Device_EnableSOFEvents();
}

/** Event handler for the library USB Control Request reception event. */
void
EVENT_USB_Device_ControlRequest(void)
{
    HID_Device_ProcessControlRequest(&Keyboard_HID_Interface);
    HID_Device_ProcessControlRequest(&Mouse_HID_Interface);
}

/** Event handler for the USB device Start Of Frame event. */
void
EVENT_USB_Device_StartOfFrame(void)
{
    HID_Device_MillisecondElapsed(&Keyboard_HID_Interface);
    HID_Device_MillisecondElapsed(&Mouse_HID_Interface);
}

/** HID class driver callback function for the creation of HID reports to the host.
 *
 *  \param[in]     HIDInterfaceInfo  Pointer to the HID class interface configuration structure being referenced
 *  \param[in,out] ReportID    Report ID requested by the host if non-zero, otherwise callback should set to the generated report ID
 *  \param[in]     ReportType  Type of the report to create, either HID_REPORT_ITEM_In or HID_REPORT_ITEM_Feature
 *  \param[out]    ReportData  Pointer to a buffer where the created report should be stored
 *  \param[out]    ReportSize  Number of bytes written in the report (or zero if no report is to be sent)
 *
 *  \return Boolean \c true to force the sending of the report, \c false to let the library determine if it needs to be sent
 */
bool
CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t *
                                    const HIDInterfaceInfo,
                                    uint8_t * const ReportID,
                                    const uint8_t ReportType,
                                    void *ReportData,
                                    uint16_t * const ReportSize)
{
    /*
     * Determine which interface must have its report generated 
     */
    if (HIDInterfaceInfo == &Keyboard_HID_Interface) {

        USB_KeyboardReport_Data_t *KeyboardReport =
            (USB_KeyboardReport_Data_t *) ReportData;

        uint8_t         x = 0;
        uint8_t         fn = 0;

        keyc = 0;               // reset keys
        KeyboardReport->Modifier = 0;

        for (x = 0; x < 6; x++)
            KeyboardReport->KeyCode[x] = 0;


        if (itsDone) {
            itsDone = false;
        }

        DDRE = 0;
        DDRF = 0;
        DDRC = 0;
        DDRD = 0;
        PORTD = 0xfc;
        PORTE = 0xFF;
        PORTF = 0xFF;
        PORTC = 0xFF;

        DDRB = 0xff;

        for (colmn = 0; colmn < 8; colmn++) {

            uint8_t         keynow = 0;

            if (colmn == 0) {
                cli();
                DDRB = 0x00;
                PORTB = 0x00;
                DDRD = (1 << 4);
                PORTD = (1 << 4);

                Delay_MS(2);

                if (PINB & 0x40) {
                    fn = 112;
                    // tp_guarder();
                    if (PINB & 0x01) {
                        KeyboardReport->KeyCode[keyc] =
                            HID_KEYBOARD_SC_PAGE_UP;
                        if (keyc < 5)
                            keyc++;
                    }
                    if (PINB & 0x02) {
                        KeyboardReport->Modifier |=
                            HID_KEYBOARD_MODIFIER_LEFTSHIFT;
                        KeyboardReport->KeyCode[keyc] =
                            HID_KEYBOARD_SC_LEFT_SHIFT;
                        if (keyc < 5)
                            keyc++;
                    }
                    if (PINB & 0x20) {
                        KeyboardReport->KeyCode[keyc] =
                            HID_KEYBOARD_SC_HOME;
                        if (keyc < 5)
                            keyc++;
                    }
                    if (PINB & 0x80) {
                        KeyboardReport->Modifier |=
                            HID_KEYBOARD_MODIFIER_RIGHTSHIFT;
                        KeyboardReport->KeyCode[keyc] =
                            HID_KEYBOARD_SC_RIGHT_SHIFT;
                        if (keyc < 5)
                            keyc++;
                    }

                } else {
                    if (PINB & 0x01) {
                        KeyboardReport->KeyCode[keyc] =
                            HID_KEYBOARD_SC_UP_ARROW;
                        if (keyc < 5)
                            keyc++;
                        // tp_guarder();
                    }
                    if (PINB & 0x02) {
                        KeyboardReport->Modifier |=
                            HID_KEYBOARD_MODIFIER_LEFTSHIFT;
                        KeyboardReport->KeyCode[keyc] =
                            HID_KEYBOARD_SC_LEFT_SHIFT;
                        if (keyc < 5)
                            keyc++;
                    }
                    if (PINB & 0x20) {
                        KeyboardReport->KeyCode[keyc] =
                            HID_KEYBOARD_SC_LEFT_ARROW;
                        if (keyc < 5)
                            keyc++;
                        // tp_guarder();
                    }
                    if (PINB & 0x80) {
                        KeyboardReport->Modifier |=
                            HID_KEYBOARD_MODIFIER_RIGHTSHIFT;
                        KeyboardReport->KeyCode[keyc] =
                            HID_KEYBOARD_SC_RIGHT_SHIFT;
                        if (keyc < 5)
                            keyc++;
                    }
                }

                // x0
                DDRD = (1 << 6);
                PORTD = (1 << 6);
                DDRB = 0x00;
                PORTB = 0x00;
                Delay_MS(2);

                if (PINB & 0x10) {
                    KeyboardReport->Modifier |=
                        HID_KEYBOARD_MODIFIER_RIGHTCTRL;
                    KeyboardReport->KeyCode[keyc] =
                        HID_KEYBOARD_SC_RIGHT_CONTROL;
                    if (keyc < 5)
                        keyc++;
                }
                if (PINB & 0x40) {
                    KeyboardReport->Modifier |=
                        HID_KEYBOARD_MODIFIER_LEFTCTRL;
                    KeyboardReport->KeyCode[keyc] =
                        HID_KEYBOARD_SC_LEFT_CONTROL;
                    if (keyc < 5)
                        keyc++;
                }
                if (PINB & 0x08) {
                    if (fn == 112)
                        KeyboardReport->KeyCode[keyc] =
                            HID_KEYBOARD_SC_VOLUME_UP;
                    else
                        KeyboardReport->KeyCode[keyc] = HID_KEYBOARD_SC_F5;
                    if (keyc < 5)
                        keyc++;
                }

                PORTB = rowY[colmn];
                DDRB = 0xff;
                DDRD = 0;
                PORTD = 0xfc;
                Delay_MS(3);
                sei();
            }

            PORTB = rowY[colmn];
            while (PINB != rowY[colmn]);

            x = 1;

            if ((PINC & (1 << 7)) == 0) {
                // tp_guarder();
                keynow = keys[colmn * 14 + x + fn];
                KeyboardReport->Modifier |= keym[colmn * 14 + x];
                if (keynow != 0) {
                    KeyboardReport->KeyCode[keyc] =
                        keys[colmn * 14 + x + fn];
                    if (keyc < 5)
                        keyc++;
                }
            }
            x++;                // 2
            if ((PINC & (1 << 6)) == 0) {
                // tp_guarder();
                keynow = keys[colmn * 14 + x + fn];
                KeyboardReport->Modifier |= keym[colmn * 14 + x];
                if (keynow != 0) {
                    KeyboardReport->KeyCode[keyc] = keynow;
                    if (keyc < 5)
                        keyc++;
                }
            }
            x++;                // 3
            // Delay_MS(5);
            if ((PIND & (1 << 7)) == 0) {
                // tp_guarder();
                keynow = keys[colmn * 14 + x + fn];
                KeyboardReport->Modifier |= keym[colmn * 14 + x];

                if (keynow == HID_KEY_LOCK_TOUCHPAD) {
                    TouchPadLocked = !TouchPadLocked;
                    while ((PIND & (1 << 7)) == 0);
                }
                if (keynow != 0) {
                    KeyboardReport->KeyCode[keyc] = keynow;
                    if (keyc < 5)
                        keyc++;
                }
            }
            x++;                // 4
            // Delay_MS(5);
            if ((PIND & (1 << 3)) == 0) {
                // tp_guarder();
                keynow = keys[colmn * 14 + x + fn];
                KeyboardReport->Modifier |= keym[colmn * 14 + x];
                if (keynow != 0) {
                    KeyboardReport->KeyCode[keyc] = keynow;
                    if (keyc < 5)
                        keyc++;
                }
            }
            x++;                // 5
            if ((PINF & (1 << 1)) == 0) {
                // tp_guarder();
                keynow = keys[colmn * 14 + x + fn];
                KeyboardReport->Modifier |= keym[colmn * 14 + x];
                if (keynow != 0) {
                    KeyboardReport->KeyCode[keyc] = keynow;
                    if (keyc < 5)
                        keyc++;
                }
            }
            x++;                // 6
            if ((PINF & (1 << 6)) == 0) {
                // tp_guarder();
                keynow = keys[colmn * 14 + x + fn];
                KeyboardReport->Modifier |= keym[colmn * 14 + x];
                if (keynow != 0) {
                    KeyboardReport->KeyCode[keyc] = keynow;
                    if (keyc < 5)
                        keyc++;
                }
            }
            x++;                // 7
            if ((PINE & (1 << 6)) == 0) {
                // tp_guarder();
                keynow = keys[colmn * 14 + x + fn];
                KeyboardReport->Modifier |= keym[colmn * 14 + x];
                if (keynow != 0) {
                    KeyboardReport->KeyCode[keyc] = keynow;
                    if (keyc < 5)
                        keyc++;
                }
            }
            x++;                // 8
            if ((PINF & (1 << 4)) == 0) {
                // tp_guarder();
                keynow = keys[colmn * 14 + x + fn];
                KeyboardReport->Modifier |= keym[colmn * 14 + x];
                if (keynow != 0) {
                    KeyboardReport->KeyCode[keyc] = keynow;
                    if (keyc < 5)
                        keyc++;
                }
            }
            x++;                // 9
            if ((PIND & (1 << 5)) == 0) {
                // tp_guarder();
                keynow = keys[colmn * 14 + x + fn];
                KeyboardReport->Modifier |= keym[colmn * 14 + x];
                if (keynow != 0) {
                    KeyboardReport->KeyCode[keyc] = keynow;
                    if (keyc < 5)
                        keyc++;
                }
            }
            x++;                // 10
            if ((PINF & (1 << 5)) == 0) {
                // tp_guarder();
                keynow = keys[colmn * 14 + x + fn];
                KeyboardReport->Modifier |= keym[colmn * 14 + x];
                if (keynow != 0) {
                    KeyboardReport->KeyCode[keyc] = keynow;
                    if (keyc < 5)
                        keyc++;
                }
            }
            x++;                // 11
            if ((PINF & (1 << 7)) == 0) {
                // tp_guarder();
                keynow = keys[colmn * 14 + x + fn];
                KeyboardReport->Modifier |= keym[colmn * 14 + x];
                if (keynow != 0) {
                    KeyboardReport->KeyCode[keyc] = keynow;
                    if (keyc < 5)
                        keyc++;
                }
            }
            x++;                // 12
            if ((PINE & (1 << 2)) == 0) {
                // tp_guarder();
                keynow = keys[colmn * 14 + x + fn];
                KeyboardReport->Modifier |= keym[colmn * 14 + x];
                if (keynow != 0) {
                    KeyboardReport->KeyCode[keyc] = keynow;
                    if (keyc < 5)
                        keyc++;
                }
            }
            DDRD = 0;
            PORTD = 0xfc;
        }

        if ((KeyboardReport->Modifier == 0) && (keyc != 0))
            tp_guarder();

        *ReportSize = sizeof(USB_KeyboardReport_Data_t);
        return true;            // return false;
    }
    if (HIDInterfaceInfo == &Mouse_HID_Interface) {
        USB_WheelMouseReport_Data_t *MouseReport =
            (USB_WheelMouseReport_Data_t *) ReportData;

        MR_Y = 0;
        MR_X = 0;
        MR_W = 0;
        MR_B |= mouse;          // (1 << 0);

        // cli(); 
        if (ActionSend) {
            uint16_t        posx1 = tpdata[3] << 8 | tpdata[4];
            uint16_t        posy1 = tpdata[5] << 8 | tpdata[6];
            switch (tpdata[2]) {
            case 0:
                if (lastfingers != 0) {
                    if (time_zero > PRETAP) {

                        if (time_pressed < CLICK_MS) {

                            if (abs(startposX + startposY - posx1 - posy1)
                                < 10) {
                                if (time_two != 0)
                                    MR_B_REQ = MOUSE_RIGTH;
                                else
                                    MR_B_REQ = MOUSE_LEFT;
                            }
                        }
                    }

                    time_zero = 0;
                }
                speedlimit = 0;
                lastposX = 0;
                lastposY = 0;

                break;

            case 1:
                touch_to = TOUCH_TO;

                switch (lastfingers) {
                case 0:
                    presstime = CLICK_MS;
                    speedlimit = 0;
                    break;
                case 1:
                    if (lastposX != 0) {
                        MR_X = limited(posx1 - lastposX);
                        MR_Y = limited(posy1 - lastposY);
                    }
                    break;
                case 2:
                    speedlimit = 0;
                    break;
                default:
                    break;
                }
                
                if (lastfingers != 1) {
                    time_one = 0;
                    startposX = posx1;
                    startposY = posy1;
                    lastfingers = 1;
                }
                
                lastposX = posx1;
                lastposY = posy1;
                if (speedlimit != 0x80)
                    speedlimit += 0x04;

                break;
                
            case 2:
                if (lastfingers == 0)
                    touch_to = TOUCH_TO;

                if (lastfingers == 2) {
                    if (lastposY > posy1 + DRAG_HYST)
                        MR_W = WHEEL;
                    else if (lastposY + DRAG_HYST < posy1)
                        MR_W = -WHEEL;

                    if (MR_W != 0)
                        time_zero = 0;
                    presstime = 0;
                } else {
                    time_two = 0;
                    startposX = posx1;
                    startposY = posy1;
                    lastfingers = 2;
                }
                lastposX = posx1;
                lastposY = posy1;

                break;
            default:
                lastposX = 0;
                lastposY = 0;

                break;
            }
            lastfingers = tpdata[2];
            ActionSend = false;
            itsDone = true;
        }
        MouseReport->Y = MR_Y;
        MouseReport->X = MR_X;
        MouseReport->Button = MR_B;
        MouseReport->Wheel = MR_W;

        MR_B = 0;

        *ReportSize = sizeof(USB_WheelMouseReport_Data_t);
        return true;
    }
}




/** HID class driver callback function for the processing of HID reports from the host.
 *
 *  \param[in] HIDInterfaceInfo  Pointer to the HID class interface configuration structure being referenced
 *  \param[in] ReportID    Report ID of the received report from the host
 *  \param[in] ReportType  The type of report that the host has sent, either HID_REPORT_ITEM_Out or HID_REPORT_ITEM_Feature
 *  \param[in] ReportData  Pointer to a buffer where the received report has been stored
 *  \param[in] ReportSize  Size in bytes of the received HID report
 */
void
CALLBACK_HID_Device_ProcessHIDReport(USB_ClassInfo_HID_Device_t *
                                     const HIDInterfaceInfo,
                                     const uint8_t ReportID,
                                     const uint8_t ReportType,
                                     const void *ReportData,
                                     const uint16_t ReportSize)
{
    if (HIDInterfaceInfo == &Keyboard_HID_Interface) {

    }
}

ISR(ADC_vect)
{
    ADCSRA |= (1 << ADIF);
    button = ADCH;
    
    if (button == oldbutton) {
        if (button < 0xe8) {
            if (button > 0xa0)
                mouse = MOUSE_RIGTH;
            else if (button > 0x80)
                mouse = MOUSE_LEFT;
            else
                mouse = MOUSE_MIDDLE;
        } else
            mouse = 0;
    } else
        oldbutton = button;
}


ISR(INT2_vect)
{
#if 1
    if (TWI_StartTransmission(0x48 | TWI_ADDRESS_WRITE, 10) ==
        TWI_ERROR_NoError) {
        TWI_SendByte(0x00);
        TWI_StopTransmission();

        if (TWI_StartTransmission(0x48 | TWI_ADDRESS_READ, 10) ==
            TWI_ERROR_NoError) {
            // Read some bytes, acknowledge after the last byte is
            // received????
            for (int s = 0; s < 0x06; s++)
                TWI_ReceiveByte(&tpdata[s], false);
            TWI_ReceiveByte(&tpdata[0x06], true);
        }
    }
    // Must stop transmission afterwards to release the bus
    TWI_StopTransmission();

    if ((!TouchPadLocked) && (!tp_guard))
        ActionSend = true;
#endif
}

// timer0 overflow ~60hz
ISR(TIMER0_OVF_vect)
{
#if 1
    if (TWI_StartTransmission(0x48 | TWI_ADDRESS_WRITE, 10) ==
        TWI_ERROR_NoError) {
        TWI_SendByte(0x00);
        TWI_StopTransmission();

        if (TWI_StartTransmission(0x48 | TWI_ADDRESS_READ, 10) ==
            TWI_ERROR_NoError) {
            // Read some bytes, acknowledge after the last byte is
            // received????
            for (int s = 0; s < 0x06; s++)
                TWI_ReceiveByte(&tpdata[s], false);

            TWI_ReceiveByte(&tpdata[0x06], true);
        }
    }
    // Must stop transmission afterwards to release the bus
    TWI_StopTransmission();
    if ((!TouchPadLocked) && (!tp_guard) && (tpdata[0] != 0))
        ActionSend = true;
#endif

    if ((time_zero != 0xff) && (tpdata[2] == 0))
        time_zero++;

    if (time_zero == TOUCH_TO) {
#if TAP_ENABLED
        MR_B = MR_B_REQ;
        MR_B_REQ = 0;
#endif
        time_one = 0;
        time_two = 0;
        time_pressed = 0;
    }
    if ((time_one != 0xff) && (tpdata[2] == 1))
        time_one++;
    if ((time_two != 0xff) && (tpdata[2] == 2))
        time_two++;

    if (ticks != 0)
        ticks--;
    if (dragtime != 0)
        dragtime--;
    if (presstime != 0)
        presstime--;
    if (tpguard != 0)
        tpguard--;
    if (tpguard == 1)
        tp_guard = false;

    if (touch_to != 0)
        touch_to--;
    if (touch_to == 1) {
        tap_enabled = true;
        lastposX = 0;
        lastposY = 0;
        drag = false;
        if (presstime != 0)
            ActionSend = true;
        else
            lastfingers = 0;
    }
}