www.pudn.com > paratest.rar > paratest.c

 
#include  
 
#include  
#include  
 
#include  
#include  
#include  
 
#include  
#include  
/* 
#define DATA_PORT 0x378 
#define STATUS_PORT 0x379 
#define CONTROL_PPORT 0x37a 
#define DEV_IRQ  0x7 
*/ 
char ch; 
void PrintprortInit(); 
void readpara(); 
/*void Parall_Send_Data(unsigned char data_parall); 
*/ 
unsigned char print_state(); 
 
int print_ch(char ch); 
 
int print_ch(char ch)  /*向并口中写入数据*/ 
{ 
	int ret; 
	if(print_state()!=0) 
	{ 
		sysOutByte(0x37a,sysInByte(0x37a)|0x1); 
		sysOutByte(0x378,ch); 
		sysOutByte(0x37a,sysInByte(0x37a)&0xfe);/*?????怎么是读控制口呢？应该是状态口吧0x379??*/ 
		ret=0; 
	} 
	else ret=-1; 
	return ret; 
} 
 
 
unsigned char print_state() 
{ 
 unsigned char state; 
 state=sysInByte(0x379) & 0x80; 
 return state; 
} 
 
 
 
void readpara() 
{ 
	char ch; 
	 
	sysOutByte(0x37a,0x20|(sysInByte(0x37a))); 
        ch=sysInByte(0x378); 
         printf("\nin123\n"); 
        printf("\nch=%x\n",ch); 
        sysOutByte(0x37a,0xdf &(sysInByte(0x37a))); 
        sysInByte(0x379); 
} 
 
void PrintprortInit() 
{ 
	intConnect(INUM_TO_IVEC(0x20+0x7),readpara,0); 
	 printf("\njello\n"); 
	sysOutByte(0x37a,0X10 |(sysInByte(0x37a))); 
} 
/* 
void Output() 
{ 
        int i; 
       
        
  
        for(i=0; i<1000;i++) 
        { 
	sysOutByte(0x37a,0x10 |(sysInByte(0x37a))); 
	sysOutByte(0x378,i); 
	taskDelay(sysClkRateGet()*1); 
	 
	sysOutByte(0x37a,0xf0 &(sysInByte(0x37a)));         
        } 
   
}*/