[incubator-nuttx] branch master updated: esp32-core: Document how to disable RTC watchdog timer

[gn...@apache.org]

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gnutt pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/incubator-nuttx.git


The following commit(s) were added to refs/heads/master by this push:
     new 430a217  esp32-core: Document how to disable RTC watchdog timer
430a217 is described below

commit 430a2178fbdf6988d6552146dd80c4b235dbb085
Author: YAMAMOTO Takashi <ya...@midokura.com>
AuthorDate: Mon Mar 16 23:19:59 2020 +0900

    esp32-core: Document how to disable RTC watchdog timer
---
 boards/xtensa/esp32/esp32-core/README.txt | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/boards/xtensa/esp32/esp32-core/README.txt b/boards/xtensa/esp32/esp32-core/README.txt
index 9a13d8b..ba98f50 100644
--- a/boards/xtensa/esp32/esp32-core/README.txt
+++ b/boards/xtensa/esp32/esp32-core/README.txt
@@ -488,6 +488,11 @@ OpenOCD for the ESP32
   See https://github.com/espressif/esp-idf/tree/master/components/bootloader
   and https://github.com/espressif/esp-idf/tree/master/components/partition_table .
 
+  The secondary boot loader by default programs a RTC watchdog timer.
+  As NuttX doesn't know the timer, it reboots every ~9 seconds. You can
+  disable the timer by tweaking sdkconfig CONFIG_BOOTLOADER_WDT_ENABLE
+  and rebuild the boot loader.
+
   Running from IRAM with OpenOCD
   ------------------------------
   Running from IRAM is a good debug option.  You should be able to load the