#include <asf.h>
#include "u8g.h"
#include <string.h>

u8g_t LCD;
uint32_t sxpos = 0;
uint16_t clockminutes = 0;
char watchstring[7];
//unsigned char str_out[9];
//unsigned char xbuffer[3];

void draw(void)
{
    itoa(clockminutes,watchstring,10);
    u8g_SetColorIndex(&LCD, 1);
    //u8g_DrawBox(&LCD, 0, 0, 84, 48);
    //u8g_DrawFrame(&LCD, 0, 0, 84, 48);
    u8g_SetFont(&LCD, u8g_font_9x15);
    u8g_DrawStr(&LCD, 0, 0, watchstring);
    u8g_DrawStr(&LCD, 0, 25, "lol");
}




int main(void)
{
  /* select minimal prescaler (max system speed) */
  CLKPR = 0x80;
  CLKPR = 0x00;

  /*
    uint8_t u8g_InitSPI(u8g_t *u8g, u8g_dev_t *dev, SCK, mosi, Chip select, Register select, Reset);
    u8g_dev_pcd8544_84x48_hw_spi
    för SW måste du flytta på mosi till miso.
  */

    u8g_InitSPI(&LCD, &u8g_dev_pcd8544_84x48_hw_spi, PN(1, 7), PN(1, 6), PN(1, 2), PN(1, 3), PN(1, 1));
    u8g_SetRot180(&LCD);


    // enable bit 5 "ASSR". enables external crystal
    //ASSR |= (1<<6);
    ASSR |= (1<<5);
    u8g_Delay(250); //let external 32KHz crystal stabilize
    TCCR2B |= ((1 << WGM22));
    TIMSK2 |= (1 << OCIE2A); // Enable CTC interrupt
    sei();
    OCR2A = 1;
    TCCR2B |= (1 << CS22) | (1 << CS20); // 32.768kHz / 128 = 1Hz overflow


    DDRA |= (1 << 0);

for(;;)
{
    //memset(str_out, 0, 9); töm array
    //strcat(str_out, "pwm: ");
    //itoa(sxpos, xbuffer, 10);
    //strcat(str_out, xbuffer);

    u8g_FirstPage(&LCD);
    do
    {
        draw();
    } while ( u8g_NextPage(&LCD) );


    u8g_Delay(800); //~1fps

  }

}

ISR(TIMER2_COMPA_vect)
{
    PORTA ^= (1 << 0); // Toggle the LED
    clockminutes++;
}