mirror of
https://github.com/espressif/esp-idf.git
synced 2025-10-30 22:51:41 +01:00
01b185977c
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)
62 lines
2.1 KiB
C
62 lines
2.1 KiB
C
// Copyright 2015-2017 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/cpu.h"
|
|
#include "soc/rtc_cntl_reg.h"
|
|
#include "rom/ets_sys.h"
|
|
#include "esp_system.h"
|
|
#include "driver/rtc_cntl.h"
|
|
#include "freertos/FreeRTOS.h"
|
|
|
|
#ifdef CONFIG_BROWNOUT_DET_LVL
|
|
#define BROWNOUT_DET_LVL CONFIG_BROWNOUT_DET_LVL
|
|
#else
|
|
#define BROWNOUT_DET_LVL 0
|
|
#endif //CONFIG_BROWNOUT_DET_LVL
|
|
|
|
static void rtc_brownout_isr_handler()
|
|
{
|
|
/* Normally RTC ISR clears the interrupt flag after the application-supplied
|
|
* handler returns. Since restart is called here, the flag needs to be
|
|
* cleared manually.
|
|
*/
|
|
REG_WRITE(RTC_CNTL_INT_CLR_REG, RTC_CNTL_BROWN_OUT_INT_CLR);
|
|
/* Stall the other CPU to make sure the code running there doesn't use UART
|
|
* at the same time as the following ets_printf.
|
|
*/
|
|
esp_cpu_stall(!xPortGetCoreID());
|
|
ets_printf("\r\nBrownout detector was triggered\r\n\r\n");
|
|
esp_restart_noos();
|
|
}
|
|
|
|
void esp_brownout_init()
|
|
{
|
|
REG_WRITE(RTC_CNTL_BROWN_OUT_REG,
|
|
RTC_CNTL_BROWN_OUT_ENA /* Enable BOD */
|
|
| RTC_CNTL_BROWN_OUT_PD_RF_ENA /* Automatically power down RF */
|
|
/* Reset timeout must be set to >1 even if BOR feature is not used */
|
|
| (2 << RTC_CNTL_BROWN_OUT_RST_WAIT_S)
|
|
| (BROWNOUT_DET_LVL << RTC_CNTL_DBROWN_OUT_THRES_S));
|
|
|
|
ESP_ERROR_CHECK( rtc_isr_register(rtc_brownout_isr_handler, NULL, RTC_CNTL_BROWN_OUT_INT_ENA_M) );
|
|
|
|
REG_SET_BIT(RTC_CNTL_INT_ENA_REG, RTC_CNTL_BROWN_OUT_INT_ENA_M);
|
|
}
|