Hi Realtimers,
I'm sorry for bother you, but using nanosleep in rtlinux_3.0 causes some
strange behavior. The added code is supposed to toggle bit 0 off a
digital-io-card. The idea was to create a thread with a free running
while loop in wich an other thread is created and joined periodically.
After compiling and running the module it will work a view seconds and
then the system will crash. I noticed, that in the case of sleep-times
below 1000000 on the scope the the measured sleeptime of the calling
thread is about 5ms !?.
I'm not used in working with threads and
maybe i made a silly mistake using them. If somebody can see the error
please help me!
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/version.h>
#include <linux/errno.h>
#include <rtl_sched.h>
#include <rtl_fifo.h>
#include <linux/cons.h>
// headers for using multi-io-card, generating the signal
#include "win_ddk_types.h"
#include "pdfw_def.h"
#include "powerdaq-internal.h"
#include "powerdaq.h"
#include "pdfw_if.h"
#define UPTIME 100000
#define DOWNTIME 100000
pthread_t main_thr, trigger_thr;
unsigned int dout=0;
int board_handle=1;
void *trigger(void *dummy)
{
pd_dout_write_outputs(board_handle, dout|=(1<<0));
nanosleep(hrt2ts(UPTIME), NULL);
pd_dout_write_outputs(board_handle, dout&=~(1<<0));
return NULL;
}
void *mainthread(void *dummy)
{
while(1)
{
pthread_create(&trigger_thr, NULL, trigger, NULL);
pthread_join(trigger_thr, NULL);
//pthread_delete_np(trigger_thr);
nanosleep(hrt2ts(DOWNTIME), NULL);
}
return NULL;
}
int init_module(void)
{
pthread_create(&main_thr, NULL, mainthread, NULL);
return 0;
}
void cleanup_module(void)
{
pthread_delete_np(main_thr);
}
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Thomas Sauter Tel. 06221/75933-15
20/10 Perfect Vision [EMAIL PROTECTED]
Waldhofer Str. 100
D-69123 Heidelberg
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