From d8bb2d7c6d32781addf07afdc2b6514386b6f30e Mon Sep 17 00:00:00 2001
From: DavePutz <dwputz@gmail.com>
Date: Mon, 8 Jun 2020 10:52:27 -0500
Subject: [PATCH] Correct ticks being returned from port_get_raw_ticks()

Issue #2958 . Correct calculation of usec back to ticks in port_get_raw_ticks().
---
 ports/esp32s2/supervisor/port.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/ports/esp32s2/supervisor/port.c b/ports/esp32s2/supervisor/port.c
index 4c42f11af9..f5a4ae48e3 100644
--- a/ports/esp32s2/supervisor/port.c
+++ b/ports/esp32s2/supervisor/port.c
@@ -118,11 +118,12 @@ uint32_t port_get_saved_word(void) {
 uint64_t port_get_raw_ticks(uint8_t* subticks) {
     struct timeval tv_now;
     gettimeofday(&tv_now, NULL);
-    uint64_t all_subticks = (uint64_t)tv_now.tv_usec / 32768;
+    // convert usec back to ticks
+    uint64_t all_subticks = (uint64_t)tv_now.tv_usec / 1024;
     if (subticks != NULL) {
         *subticks = all_subticks % 32;
     }
-    return (uint64_t)tv_now.tv_sec * 1024L + all_subticks / 32;
+    return (uint64_t)tv_now.tv_sec * 1024L + all_subticks;
 }
 
 // Enable 1/1024 second tick.