demo.c

pcf8593实时时钟的驱动实例 Real Time Clock interface for Linux on CPE with FTRTC010

#include <stdio.h>
#include <stdlib.h>
//#include <sys/types.h>
//#include <sys/stat.h>
#include <sys/ioctl.h>
#include <fcntl.h>
//#include <stdlib.h>
#include <errno.h>
#include <time.h>
#include <unistd.h>
//#include <sys/wait.h>


//#include <pthread.h>
//#include <asm/ioctl.h>
//#include <linux/videodev.h>
#include <linux/rtc.h>
//#include <linux/tw2834.h>


int main()
{
	int rtc_fd;
	char p[100];
	char * time;
	struct rtc_time tm={
		.tm_sec=30,                 /* 0~59 */
		.tm_min=12,			/* 0~59 */
		.tm_hour=14,			/* 0~23 */
		.tm_mday=24,			/* 1~*,depend on month */
		.tm_mon=0,               	/* 0~11 */
		.tm_year=2008,      	/* >1970 */
		.tm_wday=4			/* 0~6 */
	};  

	rtc_fd=open("/dev/rtc",O_RDWR);
	if(rtc_fd<0){
		perror("open rtc device:");
		exit(EXIT_FAILURE);
	}

#if 0
	if(ioctl(rtc_fd,RTC_8593_INIT,NULL)<0){
		printf("Init rtc pcf8593 error!\n");
		exit(EXIT_FAILURE);
	}

	
	if(ioctl(rtc_fd,RTC_SET_TIME,&tm)<0){
		printf("Write rtc pcf8593 error!\n");
		exit(EXIT_FAILURE);
	}
#else
	if(ioctl(rtc_fd,RTC_RD_TIME,&tm)<0){
		printf("Read rtc pcf8593 error!\n");
		exit(EXIT_FAILURE);
	}

	strftime(p,100,"%c",&tm);
//	printf("The rtc time is %s\n",asctime(&tm));
	printf("The rtc time is %s\n",p);


#endif
	
	close(rtc_fd); 
	return 0;

}


#if 0
void main() 
{ 
int tw2834_dev,ioctl_ret=0;
unsigned int rdata=0;
//struct tw2834_ioinfo tw2834_ioinfo;
//tw2834_ioinfo.slave_addr= 0x84;
//tw2834_ioinfo.

tw2834_dev = open("/dev/tw2834",O_RDWR); 

if (tw2834_dev == -1 ) 
{ 
printf("Cannt open file \n"); 
exit(0); 
} 
printf("The device id is %d \n",tw2834_dev);

ioctl_ret=ioctl(tw2834_dev,TEST_READ,&rdata); 

printf("ioctl return %d \n",ioctl_ret);
printf("The read value is %d \n", rdata);
close(tw2834_dev); 

} 
#endif

 #if 0
#include <linux/init.h>
#include <linux/module.h>

static int hello_init(void)
{
    printk( "Hello, linux world \n");
    return 0;
}
//KERN_ALERT
static void hello_exit(void)
{
    printk( "Goodbye, linux world \n");
}
//KERN_ALERT
module_init(hello_init);
module_exit(hello_exit);
MODULE_LICENSE(" Dual BSD/GPL ");
#endif