From 8f46bade7afe7b38f861b9da8c7284b3988dd7b9 Mon Sep 17 00:00:00 2001
From: me-no-dev <hristo@espressif.com>
Date: Mon, 28 Jun 2021 15:44:30 +0300
Subject: [PATCH] Fix hardware timers

Fixes: https://github.com/espressif/arduino-esp32/issues/5337
Fixes: https://github.com/espressif/arduino-esp32/issues/4743

Thanks to @maxgerhardt
---
 cores/esp32/esp32-hal-timer.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/cores/esp32/esp32-hal-timer.c b/cores/esp32/esp32-hal-timer.c
index d6570383..12555fd3 100644
--- a/cores/esp32/esp32-hal-timer.c
+++ b/cores/esp32/esp32-hal-timer.c
@@ -47,7 +47,7 @@
 #define HWTIMER_LOCK()      portENTER_CRITICAL(timer->lock)
 #define HWTIMER_UNLOCK()    portEXIT_CRITICAL(timer->lock)
 
-typedef struct {
+typedef volatile struct {
     union {
         struct {
             uint32_t reserved0:   10;
@@ -272,6 +272,12 @@ void timerEnd(hw_timer_t *timer){
 }
 
 void timerAttachInterrupt(hw_timer_t *timer, void (*fn)(void), bool edge){
+#if CONFIG_IDF_TARGET_ESP32
+    if(edge){
+        log_w("EDGE timer interrupt does not work properly on ESP32! Setting to LEVEL...");
+        edge = false;
+    }
+#endif
     static bool initialized = false;
     static intr_handle_t intr_handle = NULL;
     if(intr_handle){