bus._c

AVR单片机ATMEGA128实习之—外部总线访问（附带Proteus仿真例子）

#include <iom128.h>
#include <macros.h>

//#define  AA		   0x0e00
#define  control_word   (*(volatile unsigned char *)0x7f03)  
#define  A_data   (*(volatile unsigned char *)0x7f00)
#define  B_data   (*(volatile unsigned char *)0x7f01)

//extern unsigned char A_data;  //,control_word;

//#define		Data_Length		5

//#pragma interrupt_handler CAN_INT:2			//CAN中断
//#pragma interrupt_handler Timer0_INT:17		//定时器中断
//unsigned char   CAN_Rx_buffer[Data_Length-1];
//unsigned char	CAN_Tx_buffer[Data_Length-1];




void main(void)
{
 	 unsigned char p=0 ;
	 unsigned char i;
	 
	 MCUCR = 0x80;
	 //control_word = 0x80;
	 DDRF = 0xff;
	 //p = &A_data;
	 //*p = 0xaa;
	 
	 
	 //B_data = 0xAA;
	 
	 control_word = 0x82;
	 //A_data = 0xAA;
	 
	 for(i=0;i<100;i++)
	 {
	 }
	 
	 p = B_data;
	 
	 PORTF = p;
	 //B_data = 0xAA;
}