void delay_ms(int n){
int i;
if (n != 0) {
delay_us(94)
delay_100us(9);
for (i = 1; i<n; i++) {
delay_us(96)
delay_100us(9);
}
}
}
BYTE SPI_RW(BYTE byte)
{
BYTE res = SPI_WriteRead(byte);
delay_100us();//must be after the transaction is started TODO debug the timing to check with which values commands are correctly handled
return(res);
}
int main()
{
int k;
DDRB = (1 << PB7) | (1 << PB5) | (1 << PB4) | (1 << PB3) | (1 << PB2) ; // SCK, MOSI, CE. D/C and RST outputs
SPCR = (1<<SPE) | (1<<MSTR) | (1<<SPR1); //Enable SPI, Master, set clock rate fck/16
PORTB &= ~RST;
delay_100us(1);
PORTB = RST;
spiwrite(0x21); // extended instruction mode
spiwrite(0x90); // Vop
//spiwrite(0x14); // bias to 100b
//spiwrite(0x20); // normal instruction mode
spiwrite(0x0D); // normal mode
PORTB |= DOC; // enter data mode
for(;;) //k = 0; k < 5; ++k)
{
spiwrite(0x1f);
spiwrite(0x5);
spiwrite(0x7);
spiwrite(0x0);
}
return 0;
}
void spiwrite(uint8_t data)
{
PORTB &= ~CEN;
SPDR = data;
delay_100us(1);
PORTB |= CEN;
//while( !(SPSR & (1<<SPIF) ) ) ;
}
void LCDinit(void)
{
PORTE = 00; // Clear Control port
LATE = 00; // and its corresponding Latch
TRISE = 00; // Make PORTE as output port
TRISD &= 0x0F; // Make output;
delay();
delay();
delay(); //~15 ms delay
lcd_cmd1(0x30); // #1 control byte
delay();
lcd_cmd1(0x30); // #2 control byte
delay_100us();
lcd_cmd1(0x30); // #3 control byte
delay_100us();
lcd_cmd1(0x20); // #4 control byte, sets 4 bit mode
delay_100us();
lcd_cmd(0x28); // #5 control byte Function set
lcd_cmd(0x0D); // Turn on Display
lcd_cmd(0x01); // Clear Display (clears junk if any)
lcd_cmd(0x06); // Entry mode selection
}
