/*
 *  spreadspace avr utils
 *
 *
 *  Copyright (C) 2012 Christian Pointner <equinox@spreadspace.org>
 *
 *  This file is part of spreadspace avr utils.
 *
 *  spreadspace avr utils is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  any later version.
 *
 *  spreadspace avr utils is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
 */
#define TAG_STA_PIN PINB
#define TAG_STA_BIT 4
#define PIN_B_INTERRUPT 1<<TAG_STA_BIT
//#define PIN_C_INTERRUPT 0
//#define PIN_D_INTERRUPT 0

#include <avr/io.h>
#include <avr/wdt.h>
#include <avr/interrupt.h>
#include <avr/power.h>

#include "util.h"
#include "led.h"

#include "LUFA/Drivers/Peripheral/TWI.h"

//const uint8_t SL018_ADDR = B10100000:
const uint8_t SL018_ADDR = 0xa0;
const uint8_t SL018_WRITE = 0;
const uint8_t SL018_READ  = 1;
//============================================
//  Command List, preamble + length + command 
//============================================

const unsigned char SL018CMD_ComSelectCard[]          ={1,1};                                               
const unsigned char SL018CMD_ComLoginSector0[]        ={9,2,0+2,0xAA,0xFF,0xFF,0xFF,0xFF,0xFF,0xFF};
const unsigned char SL018CMD_ComReadBlock1[]          ={2,3,1+8};       
const unsigned char SL018CMD_ComWriteBlock1[]         ={18,4,1+8,0x00,0x11,0x22,0x33,0x44,0x55,0x66,0x77,0x88,0x99,0xAA,0xBB,0xCC,0xDD,0xEE,0xFF};
const unsigned char SL018CMD_ComIntiPurse1[]          ={6,6,1+8,0x78,0x56,0x34,0x12};                               
const unsigned char SL018CMD_ComReadPurse1[]          ={2,5,1+8};       
const unsigned char SL018CMD_ComIncrPurse1[]          ={6,8,1+8,0x02,0x00,0x00,0x00};                                
const unsigned char SL018CMD_ComDecrPurse1[]          ={6,9,1+8,0x01,0x00,0x00,0x00};                                
const unsigned char SL018CMD_ComCopyValue[]           ={3,0x0A,1+8,2+8};
const unsigned char SL018CMD_ComReadUltralightPage5[] ={2,0x10,0x05};
const unsigned char SL018CMD_ComWriteUltralightPage5[]={6,0x11,0x05,0x12,0x34,0x56,0x78};
const unsigned char SL018CMD_ComRedLedOn[]            ={2,0x40,1};
const unsigned char SL018CMD_ComRedLedOff[]           ={2,0x40,0};
/*
             LUFA Library
     Copyright (C) Dean Camera, 2012.

  dean [at] fourwalledcubicle [dot] com
           www.lufa-lib.org
*/
#include <LUFA/Drivers/USB/USB.h>
#include "lufa-descriptor-usbserial.h"

USB_ClassInfo_CDC_Device_t VirtualSerial_CDC_Interface =
  {
    .Config =
      {
        .ControlInterfaceNumber         = 0,

        .DataINEndpointNumber           = CDC_TX_EPNUM,
        .DataINEndpointSize             = CDC_TXRX_EPSIZE,
        .DataINEndpointDoubleBank       = false,

        .DataOUTEndpointNumber          = CDC_RX_EPNUM,
        .DataOUTEndpointSize            = CDC_TXRX_EPSIZE,
        .DataOUTEndpointDoubleBank      = false,

        .NotificationEndpointNumber     = CDC_NOTIFICATION_EPNUM,
        .NotificationEndpointSize       = CDC_NOTIFICATION_EPSIZE,
        .NotificationEndpointDoubleBank = false,
      },
  };

void EVENT_USB_Device_ConfigurationChanged(void)
{
  CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
}

void EVENT_USB_Device_ControlRequest(void)
{
  CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
}
/* end LUFA CDC-ACM specific definitions*/

unsigned char sl018_send_buffer(const unsigned char * buffer)
{
    uint8_t len = 0;
    uint8_t pos = 0;
    unsigned char ret;
    len = buffer[0];
    if (TWI_StartTransmission(SL018_ADDR | SL018_WRITE,10) == TWI_ERROR_NoError)
    {
        for(pos=0; pos<=len; pos++)
          TWI_SendByte(buffer[pos]);
        // Must stop transmission afterwards to release the bus
        TWI_StopTransmission();
    } else {
     return 1;
    }
    return 0;
}

void handle_cmd(uint8_t cmd)
{
  switch(cmd) {
  case '0': led_off(); break;
  case '1': led_on(); break;
  case 't': led_toggle(); break;
  case 'r': reset2bootloader(); break;
  case '3': 
           if(sl018_send_buffer(SL018CMD_ComRedLedOff))
           {
             led_toggle();
           }
           break;
  default: CDC_Device_SendString(&VirtualSerial_CDC_Interface, "error\n"); return;
  }
  CDC_Device_SendString(&VirtualSerial_CDC_Interface, "ok\n");
}


static void PCint(void)
{
  if( (TAG_STA_PIN >> TAG_STA_BIT) & 1)
    led_on();
  else 
    led_off();
}

SIGNAL(PCINT0_vect) {
  PCint();
}
//SIGNAL(PCINT1_vect) {
//  PCint();
//}
//SIGNAL(PCINT2_vect) {
//  PCint();
//}


int main(void)
{
  MCUSR &= ~(1 << WDRF);
  wdt_disable();

  PCMSK0=PIN_B_INTERRUPT;
  //PCMSK1=PIN_C_INTERRUPT;
  //PCMSK2=PIN_D_INTERRUPT;
  PCICR|=1<<PCIE0;

  cpu_init();
  led_init();
  USB_Init();
  TWI_Init(TWI_BIT_PRESCALE_1, TWI_BITLENGTH_FROM_FREQ(1, 200000));
  sei();

  for(;;) {
    int16_t BytesReceived = CDC_Device_BytesReceived(&VirtualSerial_CDC_Interface);
    while(BytesReceived > 0) {
      int16_t ReceivedByte = CDC_Device_ReceiveByte(&VirtualSerial_CDC_Interface);
      if(!(ReceivedByte < 0)) {
        handle_cmd(ReceivedByte);
      }
      BytesReceived--;
    }

    CDC_Device_USBTask(&VirtualSerial_CDC_Interface);
    USB_USBTask();
  }
}