Part Number: AM3358
Tool/software: Linux
Hi,
we find an issue when we call timer functions in our application, below are the steps we can reproduce it:
SDK: ti-processor-sdk-linux-rt-am335x-evm-04.02.00.09 pre-build images
Hardware: Am335x ICE Board Rev 2.1A
1, copy a timer example code timer.c to board
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <time.h>
#include <unistd.h>
#include <string.h>
void timerCallback(union sigval sig_value)
{
void *pData = sig_value.sival_ptr;
printf("Pointer = %p\n", pData);
fflush(stdout);
}
/*
*
*/
int main(int argc, char** argv) {
timer_t timerid = 0;
struct sigevent sigevent;
struct itimerspec timerspec;
int err = 0;
memset(&sigevent, 0, sizeof(sigevent));
memset(&timerspec, 0, sizeof(timerspec));
sigevent.sigev_notify = SIGEV_THREAD;
sigevent.sigev_notify_function = timerCallback;
sigevent.sigev_value.sival_ptr = (void*) 0x1234;
err = timer_create(CLOCK_MONOTONIC, &sigevent, &timerid);
if(err != 0)
{
perror("Timer create failed");
return EXIT_FAILURE;
}
timerspec.it_value.tv_sec = 2;
timerspec.it_interval.tv_sec = 2;
err = timer_settime(timerid, 0, &timerspec, NULL);
if(err != 0)
{
perror("Timer settime failed");
return EXIT_FAILURE;
}
for(;;)
{
sleep(10);
}
return EXIT_SUCCESS;
}
2, compiled it in board:
gcc timer.c -o timertest -lrt
3, run the application:
root@am335x-evm:~# ./timertest
Pointer = 0x1234
the application only output "Pointer = 0x1234" once.
4, I test this code in my ubuntu host and it keeps printing "Pointer = 0x1234" every 2 seconds.
VirtualBox:~/tmp$ ./timertest
Pointer = 0x1234
Pointer = 0x1234
Pointer = 0x1234
Pointer = 0x1234
^C
I am not sure if it is related to driver or any application library.
could anybody give me any advice?
Best regards
Dylan
