port.h

本源码是实现1602的液晶驱动,实验平台是AVR单片机

# define Read_PA0       ((PINA<<7)>>7)
# define Read_PA1       ((PINA<<6)>>7)
# define Read_PA2       ((PINA<<5)>>7)
# define Read_PA3       ((PINA<<4)>>7)
# define Read_PA4       ((PINA<<3)>>7)
# define Read_PA5       ((PINA<<2)>>7)
# define Read_PA6       ((PINA<<1)>>7)
# define Read_PA7       (PINA>>7)

# define Read_PB0       ((PINB<<7)>>7)
# define Read_PB1       ((PINB<<6)>>7)
# define Read_PB2       ((PINB<<5)>>7)
# define Read_PB3       ((PINB<<4)>>7)
# define Read_PB4       ((PINB<<3)>>7)
# define Read_PB5       ((PINB<<2)>>7)
# define Read_PB6       ((PINB<<1)>>7)
# define Read_PB7       (PINB>>7)

# define Read_PC0       ((PINC<<7)>>7)
# define Read_PC1       ((PINC<<6)>>7)
# define Read_PC2       ((PINC<<5)>>7)
# define Read_PC3       ((PINC<<4)>>7)
# define Read_PC4       ((PINC<<3)>>7)
# define Read_PC5       ((PINC<<2)>>7)
# define Read_PC6       ((PINC<<1)>>7)
# define Read_PC7       (PINC>>7)

# define Read_PD0       ((PIND<<7)>>7)
# define Read_PD1       ((PIND<<6)>>7)
# define Read_PD2       ((PIND<<5)>>7)
# define Read_PD3       ((PIND<<4)>>7)
# define Read_PD4       ((PIND<<3)>>7)
# define Read_PD5       ((PIND<<2)>>7)
# define Read_PD6       ((PIND<<1)>>7)
# define Read_PD7       (PIND>>7)

/****************************
*     高级端口宏定义        *
****************************/
struct PORTBIT
{
    unsigned Bit0:1;
	unsigned Bit1:1;
    unsigned Bit2:1;
	unsigned Bit3:1;
    unsigned Bit4:1;
	unsigned Bit5:1;
    unsigned Bit6:1;
	unsigned Bit7:1;	
}*PORTA_BIT,*PORTB_BIT,*PORTC_BIT,*PORTD_BIT;

/***********************************************************
*  函数说明：高级端口扩展初始化                            *
***********************************************************/
void PORTDefine(void)
{
PORTA_BIT = ( struct PORTBIT *)0x3b;
PORTB_BIT = ( struct PORTBIT *)0x38;
PORTC_BIT = ( struct PORTBIT *)0x35;
PORTD_BIT = ( struct PORTBIT *)0x32;
UBRR=0x33; 
UCSRB=0x18;
}


# define _PA0        (*PORTA_BIT).Bit0
# define _PA1        (*PORTA_BIT).Bit1
# define _PA2        (*PORTA_BIT).Bit2
# define _PA3        (*PORTA_BIT).Bit3
# define _PA4        (*PORTA_BIT).Bit4
# define _PA5        (*PORTA_BIT).Bit5
# define _PA6        (*PORTA_BIT).Bit6
# define _PA7        (*PORTA_BIT).Bit7

# define _PB0        (*PORTB_BIT).Bit0
# define _PB1        (*PORTB_BIT).Bit1
# define _PB2        (*PORTB_BIT).Bit2
# define _PB3        (*PORTB_BIT).Bit3
# define _PB4        (*PORTB_BIT).Bit4
# define _PB5        (*PORTB_BIT).Bit5
# define _PB6        (*PORTB_BIT).Bit6
# define _PB7        (*PORTB_BIT).Bit7

# define _PC0        (*PORTC_BIT).Bit0
# define _PC1        (*PORTC_BIT).Bit1
# define _PC2        (*PORTC_BIT).Bit2
# define _PC3        (*PORTC_BIT).Bit3
# define _PC4        (*PORTC_BIT).Bit4
# define _PC5        (*PORTC_BIT).Bit5
# define _PC6        (*PORTC_BIT).Bit6
# define _PC7        (*PORTC_BIT).Bit7

# define _PD0        (*PORTD_BIT).Bit0
# define _PD1        (*PORTD_BIT).Bit1
# define _PD2        (*PORTD_BIT).Bit2
# define _PD3        (*PORTD_BIT).Bit3
# define _PD4        (*PORTD_BIT).Bit4
# define _PD5        (*PORTD_BIT).Bit5
# define _PD6        (*PORTD_BIT).Bit6
# define _PD7        (*PORTD_BIT).Bit7