125 lines
3.9 KiB
C
125 lines
3.9 KiB
C
// Copyright 2018 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "soc/rtc_wdt.h"
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#include "soc/rtc.h"
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bool rtc_wdt_get_protect_status()
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{
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return READ_PERI_REG(RTC_CNTL_WDTWPROTECT_REG) != RTC_CNTL_WDT_WKEY_VALUE;
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}
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void rtc_wdt_protect_off()
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{
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WRITE_PERI_REG(RTC_CNTL_WDTWPROTECT_REG, RTC_CNTL_WDT_WKEY_VALUE);
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}
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void rtc_wdt_protect_on()
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{
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WRITE_PERI_REG(RTC_CNTL_WDTWPROTECT_REG, 0);
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}
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void rtc_wdt_enable()
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{
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REG_SET_BIT(RTC_CNTL_WDTFEED_REG, RTC_CNTL_WDT_FEED);
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SET_PERI_REG_MASK(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_EN | RTC_CNTL_WDT_PAUSE_IN_SLP);
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}
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void rtc_wdt_disable()
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{
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bool protect = rtc_wdt_get_protect_status();
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if (protect) {
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rtc_wdt_protect_off();
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}
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REG_SET_BIT(RTC_CNTL_WDTFEED_REG, RTC_CNTL_WDT_FEED);
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rtc_wdt_set_stage(RTC_WDT_STAGE0, RTC_WDT_STAGE_ACTION_OFF);
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rtc_wdt_set_stage(RTC_WDT_STAGE1, RTC_WDT_STAGE_ACTION_OFF);
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rtc_wdt_set_stage(RTC_WDT_STAGE2, RTC_WDT_STAGE_ACTION_OFF);
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rtc_wdt_set_stage(RTC_WDT_STAGE3, RTC_WDT_STAGE_ACTION_OFF);
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REG_CLR_BIT(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_FLASHBOOT_MOD_EN);
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REG_CLR_BIT(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_EN);
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if (protect) {
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rtc_wdt_protect_on();
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}
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}
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void rtc_wdt_feed()
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{
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bool protect = rtc_wdt_get_protect_status();
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if (protect) {
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rtc_wdt_protect_off();
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}
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REG_SET_BIT(RTC_CNTL_WDTFEED_REG, RTC_CNTL_WDT_FEED);
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if (protect) {
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rtc_wdt_protect_on();
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}
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}
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esp_err_t rtc_wdt_set_time(rtc_wdt_stage_t stage, unsigned int timeout_ms)
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{
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if (stage > 3) {
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return ESP_ERR_INVALID_ARG;
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}
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uint32_t timeout = (uint32_t) ((uint64_t) rtc_clk_slow_freq_get_hz() * timeout_ms / 1000);
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if (stage == RTC_WDT_STAGE0) {
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WRITE_PERI_REG(RTC_CNTL_WDTCONFIG1_REG, timeout);
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} else if (stage == RTC_WDT_STAGE1) {
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WRITE_PERI_REG(RTC_CNTL_WDTCONFIG2_REG, timeout);
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} else if (stage == RTC_WDT_STAGE2) {
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WRITE_PERI_REG(RTC_CNTL_WDTCONFIG3_REG, timeout);
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} else {
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WRITE_PERI_REG(RTC_CNTL_WDTCONFIG4_REG, timeout);
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}
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return ESP_OK;
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}
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esp_err_t rtc_wdt_set_stage(rtc_wdt_stage_t stage, rtc_wdt_stage_action_t stage_sel)
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{
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if (stage > 3 || stage_sel > 4) {
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return ESP_ERR_INVALID_ARG;
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}
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if (stage == RTC_WDT_STAGE0) {
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REG_SET_FIELD(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_STG0, stage_sel);
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} else if (stage == RTC_WDT_STAGE1) {
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REG_SET_FIELD(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_STG1, stage_sel);
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} else if (stage == RTC_WDT_STAGE2) {
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REG_SET_FIELD(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_STG2, stage_sel);
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} else {
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REG_SET_FIELD(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_STG3, stage_sel);
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}
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return ESP_OK;
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}
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esp_err_t rtc_wdt_set_length_of_reset_signal(rtc_wdt_reset_sig_t reset_src, rtc_wdt_length_sig_t reset_signal_length)
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{
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if (reset_src > 1 || reset_signal_length > 7) {
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return ESP_ERR_INVALID_ARG;
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}
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if (reset_src == 0) {
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REG_SET_FIELD(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_SYS_RESET_LENGTH, reset_signal_length);
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} else {
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REG_SET_FIELD(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_CPU_RESET_LENGTH, reset_signal_length);
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}
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return ESP_OK;
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}
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bool rtc_wdt_is_on()
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{
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return (REG_GET_BIT(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_EN) != 0) || (REG_GET_BIT(RTC_CNTL_WDTCONFIG0_REG, RTC_CNTL_WDT_FLASHBOOT_MOD_EN) != 0);
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}
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