parrell_port.cpp

linux d

#include <sys/io.h>
#include <sys/ioctl.h>
#include <termios.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pthread.h>
//#include < sched.h>
#include <signal.h>
#include <sys/types.h>
#include <time.h>


pthread_mutex_t mutex;
struct timespec delay;


void *TimerOpenThread(void * arg)
{
	while(1)
	{
		pthread_mutex_lock(&mutex);
		unsigned char nstate_out = 0x04;
		outb(0x04,0x37a);
		unsigned char a =(nstate_out&&0x80)*5;
		printf("the NO 16  is %d v \n ",a);	
		pthread_mutex_unlock(&mutex);
		//pthread_delay_np(&delay);
		delay.tv_sec=5;
    		delay.tv_nsec=0;
		nanosleep(&delay,NULL);
		sleep(5);
		
	}
	
}

void Timer_Close()
{
	while(1){
		
		pthread_mutex_lock(&mutex);
		unsigned char nstate_out = 0x0;
		outb(0x0,0x37a);
		unsigned char a =(nstate_out&&0x80)*5;
		printf("the NO 16  is %d v \n ",a);
		pthread_mutex_unlock(&mutex);
		//pthread_delay_np(&delay);
		delay.tv_sec=5;
		delay.tv_nsec=0;
		nanosleep(&delay,NULL);
		sleep(3);
	}
	
} 

int main(void)
{
	unsigned char nstate = 0;
	unsigned char nstate_out = 0;
	iopl(3);//open all the port
	
	
	
	/////
	pthread_t tid_open;
	pthread_attr_t attr;
	pthread_attr_init( &attr );
	pthread_attr_setdetachstate(&attr,PTHREAD_CREATE_DETACHED);
	//delay.tv_sec = 2 ;
	//delay.tv_nsec = 0 ;
	//default to init mutex object
	pthread_mutex_init(&mutex,NULL);	
	pthread_create(&tid_open,&attr,TimerOpenThread,(void *)0);
	Timer_Close();
	/////
	
	//while(1)
	{
		
		nstate = inb(0x379);
		if( nstate&&0x40 == 0)
		{ 
			printf("the input value is zero\n");
		}
	
	}
	return 0;
	
}