// Print to the console when buttons are pressed
int on_pause_press(){
printf("pressed Pause\n");
if(get_mode_button_state() == 1){
//both buttons pressed exit cleanly
set_state(EXITING);
}
return 0;
}
/******************************************************************
* void* mode_unpressed_handler(void* ptr)
* wait on rising edge of mode button
*******************************************************************/
void* mode_unpressed_handler(void* ptr){
struct pollfd fdset[1];
char buf[MAX_BUF];
int gpio_fd = gpio_fd_open(MODE_BTN);
fdset[0].fd = gpio_fd;
fdset[0].events = POLLPRI; // high-priority interrupt
// keep running until the program closes
while(get_state() != EXITING) {
// system hangs here until FIFO interrupt
poll(fdset, 1, POLL_TIMEOUT);
if (fdset[0].revents & POLLPRI) {
lseek(fdset[0].fd, 0, SEEK_SET);
read(fdset[0].fd, buf, MAX_BUF);
if(get_mode_button_state()==UNPRESSED){
mode_unpressed_func();
}
}
}
gpio_fd_close(gpio_fd);
return 0;
}
