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/*
 * atcpad.c
 *
 * Created: 7/06/2013 10:15:34 PM
 *  Author: pfowler
 */ 


#include <avr/io.h>
#include <avr/pgmspace.h>
#include <avr/interrupt.h>

#include <util/delay.h>
#include <avr/wdt.h>
#include <stdlib.h>
#include <string.h>

#include "usbdrv.h"
#include "atcpad.h"
#include "avrutil.h"
#include "lcd.h"
#include "wire.h"
#include "hiddesc.h"

#define BUTTONS                 1
#define ROTARYS                 1

#define LCD_UPDATE              11
#define ROTARY_UPDATE   5


uint8_t getKey(void);
void updateLcd();
void checkRotarys();
void checkButtons(void);


// * = 0x25, #=0x20
// F9 = 0x42, F12 = 0x45
uint8_t keyMap[] = {    0x1E, 0x1F, 0x20,
                                                0x21, 0x22, 0x23,
                                                0x24, 0x25, 0x26,
                                                0x42, 0x27, 0x45 };

uint8_t lcdRectangle[] = {   
        0B00011111,
        0B00010001,
        0B00010001,
        0B00010001,
        0B00010001,
        0B00010001,
        0B00010001,
        0B00011111 };


uint8_t oldpotVal = 0;
uint8_t keySelect = 1;

// Start these of at different times, so they
//  don't kick of it the same loop run
volatile uint8_t lcdTimer = 8;
volatile uint8_t rotaryTimer = 5;

volatile struct {
        uint8_t detected;
        uint8_t timer;
        uint8_t waitup;
} buttons[BUTTONS];

volatile struct {
        
        union {
                uint8_t data;
                struct {
                        uint8_t stat:4;
                        uint8_t sent:4;
                };
        };
} rotary[ROTARYS];

int main(void)
{
        
        setup();
        
    while(1)
    {
                wdt_reset();
        loop(); 
    }
}

void setup() {
        /*
                DDR : 1 = Output, 0 = Input
                PORT: 1 = Pullup for Input, otherwise set output
                PIN : Read input pin
        */

        /*
                PB0     - Output                - Keypad 2
                PB1     - Output                - Keypad 7
                PB2     - Output                - Keypad 6
                PB3     - Output                - Keypad 4
                PB4     - Input, Pullup         - Function select
                PB5     - Input, Pullup         - Function select
        */
        DDRB    = 0B00001111;
        PORTB   = 0B00111111;

        /*
                PD0     - Input, Pullup, PCINT16        - Rotary 1a
                PD1     - Input, Pullup, PCINT17        - Rotary 1b


                PD4     - Output                - Keypad select status led
                PD5     - Input, Pullup         - Keypad 3
                PD6     - Input, Pullup         - Keypad 1
                PD7     - Input, Pullup         - Keypad 5
        */
        DDRD    = 0B00010000;
        PORTD   = 0B11110011;

        PCMSK2 |= (( 1 << PCINT16 ) | ( 1 << PCINT17 )); //enable encoder pins interrupt sources
        PCICR |= ( 1 << PCIE2 ); //enable pin change interrupts
        
        analogInit();
        sysclockInit();
        
        reportKeyboard.report_id = 1;
        reportJoystick.report_id = 2;   
        
        usbDeviceDisconnect();  /* enforce re-enumeration, do this while interrupts are disabled! */
        _delay_ms(500);
        usbDeviceConnect();

        sei();
        wdt_enable(WDTO_1S);
        usbInit();

        i2c_master();
        lcd_init();
        lcd_createChar(0x00, lcdRectangle);

        char strTime[] = {'T', 'i', 'm', 'e', ':', 0x00};
        lcd_setCursor(0, 1);
        lcd_print(strTime);

        buttons[0].detected = 0;
        buttons[0].timer = 0;
        buttons[0].waitup = 0;

        cbi(PORTD, 4);
                
}

void loop() {

        usbPoll();

        if (lcdTimer==0) {
                updateLcd();
                lcdTimer = LCD_UPDATE;
        }
        
        
        if (rotaryTimer==0) {
                checkRotarys();
                rotaryTimer = ROTARY_UPDATE;
        }
        
        checkButtons();

 
        if(usbInterruptIsReady()){
            usbSendHidReport((uchar*)&reportKeyboard, sizeof(reportKeyboard));
            usbSendHidReport((uchar*)&reportJoystick, sizeof(reportJoystick));
    }   
}

uint8_t getKey() {
        uint8_t col, row = 0;
        uint8_t key = 0;
        uint8_t n = 1;

        for (row=0; row<=3; row++) {
                cbi(PORTB, row);
                _delay_us(10);                          // Wait for the port to change

                for (col=5; col<=7; col++) {
                        if (rbi(PIND, col) == 0)
                        key = n;
                        n++;
                }

                sbi(PORTB, row);
        }
        return key;
}

void checkRotarys() {
        uint8_t rot = 0;
        for (rot=0; rot<=(ROTARYS - 1); rot++) {
                if (rotary[rot].stat == 0x01 && rotary[rot].sent == 0) {
                        rotary[rot].sent = 1;
                        switch (rot) {
                                case(0):        reportJoystick.rot1a = 1; break;
                                case(1):        reportJoystick.rot2a = 1; break;
                        }
                } else if (rotary[rot].stat == 0x02 && rotary[rot].sent == 0) {
                        rotary[rot].sent = 1;
                        switch (rot) {
                                case(0):      reportJoystick.rot1b = 1; break;
                                case(1):      reportJoystick.rot2b = 1; break;
                        }
                } else {
                        rotary[rot].sent = 0;
                }
                rotary[rot].stat = 0;

                if (rbi(PINB, PB4))
                        rotary[rot].sent = 0;
        }
}

void checkButtons() {

        reportJoystick.data1[0] = (-128 + analogRead(0));
        reportJoystick.data1[1] = (-128 + analogRead(1));
        reportJoystick.data2 = 0x0000;                          // Clear all the buttons

        reportKeyboard.modifier = 0x00;
        reportKeyboard.keycode = 0x00;

        uint8_t key = getKey();
        if (rbi(keySelect, 0)) {
                // Keypad is joystick
                if (key > 0)
                        reportJoystick.data2 |= (1 << (--key));
                } else {
                // Keypad is keyboard
                if (key > 0) {
                        //if (key==10 || key==12) // Left shift, for *, #
                        //      reportKeyboard.modifier |= (1<<1);
                        reportKeyboard.keycode = keyMap[--key];
                }
        }

        // Only one button for now
        if (rbi(PINB, 5) == 0 && buttons[0].detected == 0 && buttons[0].timer == 0) {
                buttons[0].detected = 1;
                buttons[0].timer = 5;
                
        }
        
        if (rbi(PINB, 5) == 1 && buttons[0].waitup == 1) {
                buttons[0].detected = 0;
                buttons[0].timer = 0;
                buttons[0].waitup = 0;
        }
        
        if (buttons[0].detected == 1 && buttons[0].timer == 0 && buttons[0].waitup == 0 ) {
                
                xbi(keySelect, 0);

                if (keySelect == 0)
                        sbi(PORTD, PD4);
                else
                        cbi(PORTD, PD4);        
                
                buttons[0].waitup = 1;
        }
}

void updateLcd() {
        usbPoll();
        

        char syschar[10];
        ultoa(systime, syschar, 10);
        lcd_overprint_right(syschar, 10, 5, 1);

        uint8_t potVal = map_8(analogRead(0), 0, 255, 0, 100);
        if (potVal != oldpotVal) {
                lcd_percent_graph(potVal, 0, 0);
                oldpotVal = potVal;

                char pot[3];
                utoa(potVal, pot, 10);
                lcd_overprint_right(pot, 3, 11, 0);

                // Set percentage
                lcd_setCursor(15, 0);
                lcd_char(0x25);
        }
}

void millis_tick() {
        
}

ISR(TIMER0_OVF_vect) {
        tmr0_ovf++;
        if (tmr0_ovf >= sys_ovf_tick) {
                systime++;
                tmr0_ovf = 0;
                //millis_tick();        // Not working, taking too long to call?

                if (buttons[0].timer)
                        buttons[0].timer--;
                        
                if (lcdTimer)
                        lcdTimer--;
                        
                if (rotaryTimer)
                        rotaryTimer--;

        }
}
void usbSendHidReport(uchar * data, uchar len) {
        while(1)
        {
                usbPoll();
                if (usbInterruptIsReady())
                {
                        usbSetInterrupt(data, len);
                        break;
                }
        }
}

usbMsgLen_t usbFunctionSetup(uchar data[8]) {
        usbRequest_t *rq = (void *)data;

        if((rq->bmRequestType & USBRQ_TYPE_MASK) == USBRQ_TYPE_CLASS) {
                switch (rq->bRequest) {
                        case USBRQ_HID_GET_REPORT:
                                if (rq->wValue.bytes[0] == 1)
                                        return sizeof(reportKeyboard);
                                else if (rq->wValue.bytes[0] == 2)
                                        return sizeof(reportJoystick);
                                else
                                        return 0;
                        case USBRQ_HID_GET_IDLE:
                                usbMsgPtr = &idleRate;
                                return 1;
                        
                        
                        
                        default:
                                return 0;
                }
        }
        return 0;
}

void hadUsbReset(void) {
}