From b45cf11ff1eae5cc443914789298abe093b8d204 Mon Sep 17 00:00:00 2001
From: lbernstone <lbernstone@gmail.com>
Date: Mon, 19 Apr 2021 03:28:06 -0600
Subject: [PATCH] Fixed ESP::getCycleCount for S2/C3 (#5075)

Fixes #5071
---
 cores/esp32/Esp.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/cores/esp32/Esp.h b/cores/esp32/Esp.h
index 34643117..81684836 100644
--- a/cores/esp32/Esp.h
+++ b/cores/esp32/Esp.h
@@ -22,6 +22,9 @@
 
 #include <Arduino.h>
 #include <esp_partition.h>
+#ifndef CONFIG_IDF_TARGET_ESP32 // Broken in IDF 20210417
+#include <hal/systimer_hal.h>
+#endif
 
 /**
  * AVR macros for WDT managment
@@ -111,7 +114,11 @@ public:
 uint32_t ARDUINO_ISR_ATTR EspClass::getCycleCount()
 {
     uint32_t ccount;
+#ifdef CONFIG_IDF_TARGET_ESP32
     __asm__ __volatile__("esync; rsr %0,ccount":"=a" (ccount));
+#else // This should work on ESP32 once the hal is complete
+    ccount = systimer_hal_get_counter_value(SYSTIMER_COUNTER_0);
+#endif
     return ccount;
 }