Moxa UC-7101-T-LX Руководство по программной части онлайн [40/46] 170792

UC-7101/7110/7112 Software User’s Manual UC-7101/7110/7112 Device API

5-6

struct timeval time;

time.tv_sec = msec / 1000;

time.tv_usec = (msec % 1000) * 1000;

select(1, NULL, NULL, NULL, &time);

}

static int swtdfd;

static int stopflag=0;

static void stop_swatchdog()

{

stopflag = 1;

}

static void do_swatchdog(void)

{

swtd_enable(swtdfd, 500);

while ( stopflag == 0 ) {

mydelay(250);

swtd_ack(swtdfd);

}

swtd_disable(swtdfd);

}

int main(int argc, char *argv[])

{

pid_t sonpid;

signal(SIGUSR1, stop_swatchdog);

swtdfd = swtd_open();

if ( swtdfd < 0 ) {

printf(“Open sWatchDog device fail !\n”);

exit(1);

}

if ( (sonpid=fork()) == 0 )

do_swatchdog();

// do user application main function

…

// end user application

kill(sonpid, SIGUSR1);

swtd_close(swtdfd);

exit(1);

}

The makefile is shown below:

All:

arm-elf-gcc –Wl, -elf2flt –o xxxx xxxx.c –lmoxalib