windows/schedule: Add micropython.schedule to windows port.

Author: andrewleech

ports/windows/mpconfigport.h

@@ -165,6 +165,9 @@
 #define MICROPY_ERROR_PRINTER       (&mp_stderr_print)
 #define MICROPY_WARNINGS            (1)
 #define MICROPY_PY_STR_BYTES_CMP_WARN (1)
+#ifndef MICROPY_ENABLE_SCHEDULER
+#define MICROPY_ENABLE_SCHEDULER    (1)
+#endif
 
 // VFS stat functions should return time values relative to 1970/1/1
 #define MICROPY_EPOCH_IS_1970       (1)
@@ -220,6 +223,15 @@ typedef long mp_off_t;
 
 #define MICROPY_MPHALPORT_H         "windows_mphal.h"
 
+#if MICROPY_ENABLE_SCHEDULER
+#define MICROPY_EVENT_POLL_HOOK \
+    do { \
+        extern void mp_handle_pending(bool); \
+        mp_handle_pending(true); \
+        mp_hal_delay_us(500); \
+    } while (0);
+#endif
+
 // We need to provide a declaration/definition of alloca()
 #include <malloc.h>