Hello, I'm polling some Rising edge on a given GPIO using such code #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; struct timeval tv; char buffer[2]; if (argc != 2) { fprintf(stderr, "usag...