Use CircuitPython _TICKS_PERIOD

.. since Adafruit_CircuitPython_asyncio is hard-coded to this _TICKS_PERIOD
not the one that would otherwise be used on Unix

This fixes all the uasyncio test failures on Unix

Author: jepler

extmod/moduasyncio.c

@@ -70,32 +70,20 @@ STATIC mp_obj_t task_getiter(mp_obj_t self_in, mp_obj_iter_buf_t *iter_buf);
 /******************************************************************************/
 // Ticks for task ordering in pairing heap
 
-#if !CIRCUITPY || (defined(__unix__) || defined(__APPLE__))
-STATIC mp_obj_t ticks(void) {
-    return MP_OBJ_NEW_SMALL_INT(mp_hal_ticks_ms() & (MICROPY_PY_UTIME_TICKS_PERIOD - 1));
-}
-
-STATIC mp_int_t ticks_diff(mp_obj_t t1_in, mp_obj_t t0_in) {
-    mp_uint_t t0 = MP_OBJ_SMALL_INT_VALUE(t0_in);
-    mp_uint_t t1 = MP_OBJ_SMALL_INT_VALUE(t1_in);
-    mp_int_t diff = ((t1 - t0 + MICROPY_PY_UTIME_TICKS_PERIOD / 2) & (MICROPY_PY_UTIME_TICKS_PERIOD - 1))
-        - MICROPY_PY_UTIME_TICKS_PERIOD / 2;
-    return diff;
-}
-#else
 #define _TICKS_PERIOD (1lu << 29)
 #define _TICKS_MAX (_TICKS_PERIOD - 1)
 #define _TICKS_HALFPERIOD (_TICKS_PERIOD >> 1)
 
-#define ticks() supervisor_ticks_ms()
+STATIC mp_obj_t ticks(void) {
+    return MP_OBJ_NEW_SMALL_INT(mp_hal_ticks_ms() & _TICKS_MAX);
+}
 
 STATIC mp_int_t ticks_diff(mp_obj_t t1_in, mp_obj_t t0_in) {
     mp_uint_t t0 = MP_OBJ_SMALL_INT_VALUE(t0_in);
     mp_uint_t t1 = MP_OBJ_SMALL_INT_VALUE(t1_in);
     mp_int_t diff = ((t1 - t0 + _TICKS_HALFPERIOD) & _TICKS_MAX) - _TICKS_HALFPERIOD;
     return diff;
 }
-#endif
 
 STATIC int task_lt(mp_pairheap_t *n1, mp_pairheap_t *n2) {
     mp_obj_task_t *t1 = (mp_obj_task_t *)n1;