esp-idf/components/hal/esp32c3/brownout_hal.c

// Copyright 2020 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 "hal/brownout_hal.h"
#include "soc/rtc_cntl_struct.h"
#include "soc/rtc_cntl_reg.h"
#include "regi2c_ctrl.h"
#include "regi2c_brownout.h"


void brownout_hal_config(const brownout_hal_config_t *cfg)
{
    REGI2C_WRITE_MASK(I2C_BOD, I2C_BOD_THRESHOLD, cfg->threshold);
    typeof(RTCCNTL.brown_out) brown_out_reg = {
        .close_flash_ena = cfg->flash_power_down,
        .pd_rf_ena = cfg->rf_power_down,
        .rst_wait = 0x3ff,
        .rst_ena = cfg->reset_enabled,
        .ena = cfg->enabled,
        .rst_sel = 1,
    };
    RTCCNTL.brown_out = brown_out_reg;
    // If brownout software control is enabled, hw ana reset should be disabled, because it always has the highest priority.
    RTCCNTL.brown_out.ana_rst_en = false;
}

void brownout_hal_intr_enable(bool enable)
{
    RTCCNTL.int_ena.rtc_brown_out = enable;
}

void brownout_hal_intr_clear(void)
{
    RTCCNTL.int_clr.rtc_brown_out = 1;
}