[AVR] Help [16x2 LCD interfacing with atmega16]

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#define F_CPU 4000000
#include <avr/io.h>
#include <util/delay.h>
#define MrLCDsCrib PORTD
#define DataDir_MrLCDsCrib DDRD
#define MrLCDsControl PORTB
#define DataDir_MrLCDsControl DDRB
#define LightSwitch 2
#define ReadWrite 1
#define BiPolarMood 0
void Check_IF_MrLCD_isBusy(void);
void Peek_A_Boo(void);
void Send_A_Command(unsigned char command);
void Send_A_Character(unsigned char character);
void Send_A_String(char *StringOfCharacters);
int main(void)
{
    DataDir_MrLCDsControl |= 1<<LightSwitch | 1<<ReadWrite | 1<<BiPolarMood;
    _delay_ms(50);
    Send_A_Command(0x01); //Clear Screen 0x01 = 00000001
    _delay_ms(50);
    Send_A_Command(0x38);
    _delay_us(50);
    Send_A_Command(0b00001110);
    _delay_us(50);
    Send_A_String("Newbie");
    while(1)
    {
    }
}
void Check_IF_MrLCD_isBusy()
{
    DataDir_MrLCDsCrib = 0;
    MrLCDsControl |= 1<<ReadWrite;
    MrLCDsControl &= ~1<<BiPolarMood;
    while (MrLCDsCrib >= 0x80)
    {
        Peek_A_Boo();
    }
    DataDir_MrLCDsCrib = 0xFF; //0xFF means 0b11111111
}
void Peek_A_Boo()
{
    MrLCDsControl |= 1<<LightSwitch;
    asm volatile ("nop");
    asm volatile ("nop");
    MrLCDsControl &= ~1<<LightSwitch;
}
void Send_A_Command(unsigned char command)
{
    Check_IF_MrLCD_isBusy();
    MrLCDsCrib = command;
    MrLCDsControl &= ~ ((1<<ReadWrite)|(1<<BiPolarMood));
    Peek_A_Boo();
    MrLCDsCrib = 0;
}
void Send_A_Character(unsigned char character)
{
    Check_IF_MrLCD_isBusy();
    MrLCDsCrib = character;
    MrLCDsControl &= ~ (1<<ReadWrite);
    MrLCDsControl |= 1<<BiPolarMood;
    Peek_A_Boo();
    MrLCDsCrib = 0;
}
void Send_A_String(char *StringOfCharacters)
{
    while(*StringOfCharacters > 0)
    {
        Send_A_Character(*StringOfCharacters++);
    }
}