OVMS3-idf/components/soc/esp32s2/brownout_hal.c
Ivan Grokhotkov 70752baba4 esp32s2: add brownout detector support
1. add brownout detector HAL for esp32 and esp32s2
2. enable brownout reset for esp32 rev. 1 and above
3. add approximate brownout detector levels for esp32s2
2020-01-23 13:44:19 +01:00

46 lines
1.4 KiB
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 "i2c_rtc_clk.h"
#include "i2c_brownout.h"
void brownout_hal_config(const brownout_hal_config_t *cfg)
{
I2C_WRITEREG_MASK_RTC(I2C_BOD, I2C_BOD_THRESHOLD, cfg->threshold);
typeof(RTCCNTL.brown_out) brown_out_reg = {
.out2_ena = 1,
.int_wait = 0x002,
.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,
};
RTCCNTL.brown_out = brown_out_reg;
}
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;
}