+#include "net.h"
+
+queue_t queue;
+
+static void button_pressed() {
+ /* This runs in interrupt context; don't linger. */
+ static uint64_t last_button_press_time = 0;
+ uint64_t now = time_us_64();
+ uint64_t time_since_last_press = now - last_button_press_time;
+ if (time_since_last_press > minimum_microseconds_between_button_presses) {
+ last_button_press_time = now;
+ char zero = '\0';
+ /* We don't check for failure (full queue) here because there's not much to
+ * be done about it. */
+ queue_try_add(&queue, &zero);
+ }
+}