diff options
| -rw-r--r-- | ports/esp32s2/supervisor/port.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/ports/esp32s2/supervisor/port.c b/ports/esp32s2/supervisor/port.c index 47d0c7f46..876ad739d 100644 --- a/ports/esp32s2/supervisor/port.c +++ b/ports/esp32s2/supervisor/port.c @@ -191,14 +191,14 @@ uint32_t port_get_saved_word(void) { } uint64_t port_get_raw_ticks(uint8_t* subticks) { - struct timeval tv_now; - gettimeofday(&tv_now, NULL); - // convert usec back to ticks - uint64_t all_subticks = (uint64_t)(tv_now.tv_usec * 2) / 71; + // Convert microseconds to subticks of 1/32768 seconds + // 32768/1000000 = 64/15625 in lowest terms + // this arithmetic overflows after 570 years + int64_t all_subticks = esp_timer_get_time() * 512 / 15625; if (subticks != NULL) { *subticks = all_subticks % 32; } - return (uint64_t)tv_now.tv_sec * 1024L + all_subticks / 32; + return all_subticks / 32; } // Enable 1/1024 second tick. |