#include <mega8.h>
#include <delay.h>

#define SPIPORT PORTB
#define SPIDDR DDRB
#define CS 2
#define CLK 5
#define SDA 3
#define RESET 4

#define cbi(reg, bit) (reg&=~(1<<bit))
#define sbi(reg, bit) (reg|= (1<<bit))

#define CS0 cbi(SPIPORT,CS);
#define CS1 sbi(SPIPORT,CS);
#define CLK0 cbi(SPIPORT,CLK);
#define CLK1 sbi(SPIPORT,CLK);
#define SDA0 cbi(SPIPORT,SDA);
#define SDA1 sbi(SPIPORT,SDA);
#define RESET0 cbi(SPIPORT,RESET);
#define RESET1 sbi(SPIPORT,RESET);

#define NOP 0x00 // nop
#define SWRESET 0x01 // software reset
#define BSTROFF 0x02 // booster voltage OFF
#define BSTRON 0x03 // booster voltage ON
#define RDDIDIF 0x04 // read display identification
#define RDDST 0x09 // read display status
#define SLEEPIN 0x10 // sleep in
#define SLEEPOUT 0x11 // sleep out
#define PTLON 0x12 // partial display mode
#define NORON 0x13 // display normal mode
#define INVOFF 0x20 // inversion OFF
#define INVON 0x21 // inversion ON
#define DALO 0x22 // all pixelS OFF
#define DAL 0x23 // all pixelS ON
#define SETCON 0x25 // write contrast
#define DISPOFF 0x28 // display OFF
#define DISPON 0x29 // display ON
#define CASET 0x2A // column address set
#define PASET 0x2B // page address set
#define RAMWR 0x2C // memory write
#define RGBSET 0x2D // colour set
#define PTLAR 0x30 // partial area
#define VSCRDEF 0x33 // vertical scrolling definition
#define TEOFF 0x34 // test mode
#define TEON 0x35 // test mode
#define MADCTL 0x36 // memory access control
#define SEP 0x37 // vertical scrolling start address
#define IDMOFF 0x38 // idle mode OFF
#define IDMON 0x39 // idle mode ON
#define COLMOD 0x3A // interface pixel format
#define SETVOP 0xB0 // set Vop
#define BRS 0xB4 // bottom row swap
#define TRS 0xB6 // top row swap
#define DISCTR 0xB9 // display control
#define DORO 0xBA // data order
#define TCDFE 0xBD // enable/disable DF temperature compens
#define TCVOPE 0xBF // enable/disable Vop temp comp
#define EC 0xC0 // internal or external oscillator
#define SETMUL 0xC2 // set multiplication factor
#define TCVOPAB 0xC3 // set TCVOP slopes A and B
#define TCVOPCD 0xC4 // set TCVOP slopes c and d
#define TCDF 0xC5 // set divider frequency
#define DF8COLOR 0xC6 // set divider frequency 8-color mode
#define SETBS 0xC7 // set bias system
#define RDTEMP 0xC8 // temperature read back
#define NLI 0xC9 // n-line inversion
#define DEFALT 0xEF //default


void shiftBits(byte {

CLK0
if ((b&128)!=0) SDA1 else SDA0
CLK1

CLK0
if ((b&64)!=0) SDA1 else SDA0
CLK1

CLK0
if ((b&32)!=0) SDA1 else SDA0
CLK1

CLK0
if ((b&16)!=0) SDA1 else SDA0
CLK1

CLK0
if ((b&8)!=0) SDA1 else SDA0
CLK1

CLK0
if ((b&4)!=0) SDA1 else SDA0
CLK1

CLK0
if ((b&2)!=0) SDA1 else SDA0
CLK1

CLK0
if ((b&1)!=0) SDA1 else SDA0
CLK1

}

//send data
void sendData(byte data) {

CLK0
SDA1 //1 for param
CLK1

shiftBits(data);
}

//send cmd
void sendCMD(byte data) {

CLK0
SDA0 //1 for cmd
CLK1

shiftBits(data);
}


void main(void)
{
// Declare your local variables here

// Input/Output Ports initialization
// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTB=0x00;
DDRB=0x00;

// Port C initialization
// Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTD=0x00;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
TCCR0=0x00;
TCNT0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer1 Stopped
// Mode: Normal top=FFFFh
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer2 Stopped
// Mode: Normal top=FFh
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
MCUCR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

SPIDDR=(1<<SDA)|(1<<CLK)|(1<<CS)|(1<<RESET);



while (1)
{
// Place your code here
CS0
SDA0
CLK1
RESET1
RESET0
RESET1
CLK1
SDA1
CLK1



//Software Reset
sendCMD(SWRESET);

//Sleep Out
sendCMD(SLEEPOUT);

//Booster ON
sendCMD(BSTRON);

delay_ms(10);
//Display On
sendCMD(DISPON);

//Normal display mode
sendCMD(NORON);

//Display inversion on
sendCMD(INVON);

//Data order
sendCMD(DORO);

//Memory data access control
sendCMD(MADCTL);


sendData(8|128|64); //inverse rgb + MirrorY


sendCMD(COLMOD);
sendData(3); //12-Bit per Pixel (default)

delay_ms(100);
};
}