From f071399adea2130328bccd482eb5de3c3cc02201 Mon Sep 17 00:00:00 2001
From: dongheng <Dong Heng>
Date: Mon, 22 Apr 2019 17:48:40 +0800
Subject: [PATCH] feat(freertos): Add CPU wait to save power

---
 components/esp8266/include/driver/soc.h | 10 ++++++++++
 components/freertos/port/esp8266/port.c |  2 ++
 2 files changed, 12 insertions(+)

diff --git a/components/esp8266/include/driver/soc.h b/components/esp8266/include/driver/soc.h
index cbbfcd6b..d2a7c3f1 100644
--- a/components/esp8266/include/driver/soc.h
+++ b/components/esp8266/include/driver/soc.h
@@ -128,6 +128,16 @@ static inline uint32_t soc_get_int_mask(void)
     return mask & enable & ETS_INT_MASK;
 }
 
+static inline void soc_wait_int(void)
+{
+    __asm__ __volatile__(
+            "waiti  0\n"
+            :
+            :
+            : "memory"
+    );
+}
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/components/freertos/port/esp8266/port.c b/components/freertos/port/esp8266/port.c
index 8810836b..b11b0c5e 100644
--- a/components/freertos/port/esp8266/port.c
+++ b/components/freertos/port/esp8266/port.c
@@ -342,6 +342,8 @@ void esp_internal_idle_hook(void)
 
     esp_task_wdt_reset();
     pmIdleHook();
+
+    soc_wait_int();
 }
 
 #ifndef DISABLE_FREERTOS