timer.c

泵站系统屏与屏之间的通信

#include 	<stdio.h>
#include 	<string.h>
#include 	<stdlib.h>
#include 	<fcntl.h>
#include 	<time.h>
#include 	<unistd.h>
#include 	<errno.h>
#include 	<signal.h>
#include 	<sys/types.h>  
#include 	<sys/stat.h>
#include 	<sys/time.h>
#include 	<sys/select.h>
#include 	<linux/types.h>
#include 	<linux/watchdog.h>
#include 	"include/Timer.h" 
#include 	"include/libeeprom.h"
#define		AP_CRC				"/tmp/crcfile"
#define		MAX_AP_NAME		10

extern  int main();
extern  int Read_104Data_From_Memory(int iPort,unsigned char *pRead);

void SetTime(CurrentTime NowTime)
{
	struct tm p;
	time_t timep;
//	CurrentTime nowtime;
	if(NowTime.year<38)
	{
		p.tm_year 	= NowTime.year + 100;
		p.tm_mon 	= NowTime.month - 1;
		p.tm_mday 	= NowTime.day;
		p.tm_hour 	= NowTime.hour;
		p.tm_min 	= NowTime.minute;
		p.tm_sec 	= NowTime.second;  
		timep		= mktime(&p);
		stime(&timep);
	}
//	printf("set %04d %02d %02d %02d %02d %02d \n",NowTime.year+2000, NowTime.month, NowTime.day, NowTime.hour, NowTime.minute, NowTime.second);
//	nowtime = GetTime();
//	printf("get %04d %02d %02d %02d %02d %02d %d\n",nowtime.year+2000, nowtime.month, nowtime.day, nowtime.hour, nowtime.minute, nowtime.second, nowtime.mSecond);
}	
CurrentTime GetTime(void)
{
	time_t timep;
	struct tm *p;
	struct timeval TV;
	CurrentTime	NowTime;
	time(&timep);
	p = localtime(&timep);
	NowTime.year		= (1900 + p->tm_year)%100;
	NowTime.month		= 1 + p->tm_mon;
	NowTime.day		= p->tm_mday;
	NowTime.hour		= p->tm_hour;
	NowTime.minute		= p->tm_min;
	NowTime.second		= p->tm_sec;  
	gettimeofday(&TV, NULL);
	NowTime.mSecond 	= (p->tm_sec)*1000 + (TV.tv_usec)/1000;
	return NowTime;
}
void SYS_Delay(int Msec)
{
	struct timeval tv;                                                                  
	unsigned long iDelay = Msec*1000;
	tv.tv_sec = iDelay/1000000;
	tv.tv_usec = iDelay%1000000; 
	while(select(0, NULL, NULL, NULL, &tv) != 0);
}
int InitWatchDogFd(void)
{
	int watchdog_fd;
	int watchdog_timeout = 30; //设置看门狗启动时间，单位(秒)
	do
	{
		SYS_Delay(50);
		watchdog_fd = open("/dev/misc/watchdog", O_RDWR);
	} while(watchdog_fd < 0);
	ioctl(watchdog_fd, WDIOC_SETTIMEOUT, &watchdog_timeout);
	fcntl(watchdog_fd, F_SETFL, fcntl(watchdog_fd, F_GETFL, 0) | O_NONBLOCK); 
	return watchdog_fd;
}
void RefreshWatchDogFd(int WatchDogFd)
{
	unsigned char watchdog_data = 1;
	write(WatchDogFd, &watchdog_data, 1);
}
void Prompt_Info(int signo) 
{ 
	SysTickCount ++;
	//printf("CurNetA=%d OldNetA=%d \nCurNetB=%d OldNetB=%d \n",CurNetA, OldNetA, CurNetB, OldNetB);
	if(CurNetA != OldNetA)	//每 TimerDelay 毫秒检测一次，看A网线程是否死掉
		OldNetA = CurNetA ; 
	else
		AllActive = 0 ;
	if(CurNetB != OldNetB)	//每 TimerDelay 毫秒检测一次，看B网线程是否死掉
		OldNetB = CurNetB ; 
	else
		AllActive = 0 ;		
	 if(AllActive)	//如果A, B网线程都处于运行状态，刷新看门狗
	{
//		printf("%dms Passed, A and B all Active, Refresh  Watchdog! \n",TimerDelay);
		RefreshWatchDogFd(DogFd);
	 }
}
void Init_Timer(void) 
{ 
	struct itimerval value; 
	struct sigaction act; 	
/*ITIMER_REAL:减少实际时间.到时的时候发出SIGALRM信号. 
ITIMER_VIRTUAL:减少有效时间(进程执行的时间).产生SIGVTALRM信号. 
ITIMER_PROF:减少进程的有效时间和系统时间(为进程调度用的时间).这个经常和上面一 
个使用用来计算系统内核时间和用户时间.产生SIGPROF信号.
*/
	SysTickCount = 0;
	unsigned long lDelay = TimerDelay*1000;
	DogFd = InitWatchDogFd();
	AllActive = 1 ;
	CurNetA = CurNetB = 0 ;
	OldNetA = OldNetB = 0 ;
	
	act.sa_handler	= Prompt_Info; 
	act.sa_flags		= 0; 
	sigemptyset(&act.sa_mask); 
	sigaction(SIGALRM, &act, NULL); 
	
	value.it_value.tv_sec 		= lDelay/1000000 ; 
	value.it_value.tv_usec	= lDelay/1000000 ;
	value.it_interval			= value.it_value ; 
	setitimer(ITIMER_REAL, &value, NULL); 
}
unsigned short SYS_GetCRC(unsigned char *pCRC)
{
	int i;
	unsigned char *pStart = (unsigned char *)main;
	unsigned char *pEnd = (unsigned char *)Read_104Data_From_Memory;
	unsigned short crc=0;
	unsigned char ucCode;
	unsigned long ulLen;
	if(pEnd<pStart)
		ulLen=(unsigned long)(pStart-pEnd);
	else
		ulLen=(unsigned long)(pEnd-pStart);
	while(ulLen--)
	{
		crc =crc ^ ((unsigned int)*pStart++ << 8);
		for (i=0 ; i< 8 ; i++)
		{
			if (crc & 0x8000)
			{
				crc =crc <<1 ^ 0x1021;
			}
			else
			{
				crc =crc << 1;
			}
		}
	}
	for (i=0; i<4; i++)
	{
		ucCode =crc & 0xf;
		crc =(crc>>4);
		if (ucCode<=9)
		{
			*(pCRC+i)	=ucCode+'0';
		}
		else
		{
			*(pCRC+i)	=(ucCode-10)+'A';
		}		
	}
	return 4;
}
void SetApSerialNo(unsigned char *APVersion,int nLen)
{
	int fd;
	int bytes_left=nLen; 
	int written_bytes; 
	unsigned char *ptr  = APVersion;
	if( (fd=open(AP_CRC,O_RDWR)) < 0 )
	{
		fd=open(AP_CRC,O_WRONLY|O_CREAT,S_IRUSR|S_IWUSR);
		if(fd<0)
		{
			fprintf(stderr,"Creat file Error:%s\n",strerror(errno));
			return ;
		}
	}
	while(bytes_left>0) 
	{ 
		written_bytes=write(fd,ptr,bytes_left); 
		if(written_bytes<=0) 
		{ 
			if(errno == EINTR) /*中断错误,我们继续写*/ 
				written_bytes=0; 
			else
				return ; 
		} 
		bytes_left -= written_bytes; 
		ptr += written_bytes;
	}
	close(fd);
}
void	SYS_SetVersion(unsigned char *pApName,int verMajor,int verMinor)
{
	int i;
	unsigned char cCRC[MAX_AP_NAME+15];
	for (i=0; i< MAX_AP_NAME; i++)
	{
		if (i<strlen(pApName))
		{
			cCRC[i]	=*(pApName+i);
		}
		else
		{
			cCRC[i]	=' ';
		}
	}
	if (verMajor > 9)
	{
		cCRC[MAX_AP_NAME]=(verMajor/10)%10;
	}
	else
	{
		cCRC[MAX_AP_NAME]=' ';
	}
	cCRC[MAX_AP_NAME+1] = (verMajor%10)+'0';
	cCRC[MAX_AP_NAME+2] = '.';
	cCRC[MAX_AP_NAME+3] = (verMinor / 10) + '0';
	cCRC[MAX_AP_NAME+4] = (verMinor % 10) + '0';
	cCRC[MAX_AP_NAME+5] = ' ';
	cCRC[MAX_AP_NAME+6] = 'C';
	cCRC[MAX_AP_NAME+7] = 'R';
	cCRC[MAX_AP_NAME+8] = 'C';
	cCRC[MAX_AP_NAME+9] = '=';
	SYS_GetCRC(&cCRC[MAX_AP_NAME+10]);
	
	cCRC[MAX_AP_NAME+14] = 0;
	SetApSerialNo(cCRC,MAX_AP_NAME+15);
}