Hi,
When I configure sysfs gpio, for example :
cd /sys/class/gpio/
echo 45 > export
echo rising > edge // or falling or both
and use program after, my board crash.
When I configure the edge at "none", the poll is not blocking
Can you help me please?
Best Regards
Loïc
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#include <fcntl.h>
#include <poll.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int main(int argc, char * argv[])
{
int fd;
struct pollfd fds;
char buffer[2];
if (argc != 2) {
fprintf(stderr, "usage: %s \n", argv[0]);
exit(EXIT_FAILURE);
}
if ((fd = open(argv[1], O_RDONLY)) < 0) {
perror(argv[1]);
exit(EXIT_FAILURE);
}
while (1) {
fds.fd = fd;
fds.events = POLLPRI; // or POLLIN
if (poll(& fds, 1, -1) < 0) {
perror("poll");
break;
}
printf("event\n");
lseek(fd, 0, SEEK_SET);
if (read(fd, & buffer, 2) != 2) {
perror("read");
break;
}
buffer[1] = '\0';
}
close(fd);
return EXIT_SUCCESS;
}
