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brownout detector: enable by default

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Because of errata related to BOD reset function, brownout is handled as follows:

- attach an ISR to brownout interrupt
- when ISR happens, print a message and do a software restart
- esp_restart_nonos enables RTC watchdog, so if restart fails,
  there will be  one more attempt to restart (using the RTC
  watchdog)
This commit is contained in:
Ivan Grokhotkov
2017-06-02 17:50:19 +08:00
parent 780569c04a
commit 01b185977c
6 changed files with 73 additions and 52 deletions
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39
components/soc/esp32/brownout.c
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@@ -1,39 +0,0 @@
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include "sdkconfig.h"
#include "soc/soc.h"
#include "soc/rtc_cntl_reg.h"
#if CONFIG_BROWNOUT_DET
/*
This file is included in esp-idf, but the menuconfig option for this is disabled because a silicon bug
prohibits the brownout detector from functioning correctly on the ESP32.
*/
void esp_brownout_init() {
WRITE_PERI_REG(RTC_CNTL_BROWN_OUT_REG,
RTC_CNTL_BROWN_OUT_ENA | (CONFIG_BROWNOUT_DET_LVL << RTC_CNTL_DBROWN_OUT_THRES_S) |
RTC_CNTL_BROWN_OUT_RST_ENA | (((CONFIG_BROWNOUT_DET_RESETDELAY*150)/1000) << RTC_CNTL_BROWN_OUT_RST_WAIT_S) |
RTC_CNTL_BROWN_OUT_PD_RF_ENA|RTC_CNTL_BROWN_OUT_CLOSE_FLASH_ENA);
}
#endif

21
components/soc/esp32/include/esp_brownout.h
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@@ -1,21 +0,0 @@
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef __ESP_BROWNOUT_H
#define __ESP_BROWNOUT_H
void esp_brownout_init();
#endif