uint64_t -> uint32_t

Author: cpq

README.md

@@ -928,7 +928,7 @@ for arbitrary periodic timers:
 
 ```c
 // t: expiration time, prd: period, now: current time. Return true if expired
-bool timer_expired(uint32_t *t, uint64_t prd, uint64_t now) {
+bool timer_expired(uint32_t *t, uint32_t prd, uint32_t now) {
   if (now + prd < *t) *t = 0;                    // Time wrapped? Reset timer
   if (*t == 0) *t = now + prd;                   // First poll? Set expiration
   if (*t > now) return false;                    // Not expired yet, return