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https://github.com/espressif/esp-idf.git
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120 lines
3.8 KiB
C
120 lines
3.8 KiB
C
// Copyright 2015-2019 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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// 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 <stdlib.h>
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#include <time.h>
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#include <unistd.h>
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#include <sys/time.h>
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#include "esp_log.h"
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#include "sntp.h"
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#include "lwip/apps/sntp.h"
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static const char *TAG = "sntp";
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static volatile sntp_sync_mode_t sntp_sync_mode = SNTP_SYNC_MODE_IMMED;
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static volatile sntp_sync_status_t sntp_sync_status = SNTP_SYNC_STATUS_RESET;
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static sntp_sync_time_cb_t time_sync_notification_cb = NULL;
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static uint32_t s_sync_interval = CONFIG_LWIP_SNTP_UPDATE_DELAY;
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inline void sntp_set_sync_status(sntp_sync_status_t sync_status)
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{
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sntp_sync_status = sync_status;
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}
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void __attribute__((weak)) sntp_sync_time(struct timeval *tv)
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{
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if (sntp_sync_mode == SNTP_SYNC_MODE_IMMED) {
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settimeofday(tv, NULL);
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sntp_set_sync_status(SNTP_SYNC_STATUS_COMPLETED);
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} else if (sntp_sync_mode == SNTP_SYNC_MODE_SMOOTH) {
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struct timeval tv_now;
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gettimeofday(&tv_now, NULL);
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int64_t cpu_time = (int64_t)tv_now.tv_sec * 1000000L + (int64_t)tv_now.tv_usec;
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int64_t sntp_time = (int64_t)tv->tv_sec * 1000000L + (int64_t)tv->tv_usec;
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int64_t delta = sntp_time - cpu_time;
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struct timeval tv_delta = { .tv_sec = delta / 1000000L, .tv_usec = delta % 1000000L };
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if (adjtime(&tv_delta, NULL) == -1) {
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ESP_LOGD(TAG, "Function adjtime don't update time because the error is very big");
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settimeofday(tv, NULL);
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ESP_LOGD(TAG, "Time was synchronized through settimeofday");
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sntp_set_sync_status(SNTP_SYNC_STATUS_COMPLETED);
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} else {
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sntp_set_sync_status(SNTP_SYNC_STATUS_IN_PROGRESS);
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}
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}
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if (time_sync_notification_cb) {
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time_sync_notification_cb(tv);
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}
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}
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void sntp_set_sync_mode(sntp_sync_mode_t sync_mode)
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{
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sntp_sync_mode = sync_mode;
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}
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sntp_sync_mode_t sntp_get_sync_mode(void)
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{
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return sntp_sync_mode;
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}
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// set a callback function for time synchronization notification
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void sntp_set_time_sync_notification_cb(sntp_sync_time_cb_t callback)
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{
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time_sync_notification_cb = callback;
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}
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sntp_sync_status_t sntp_get_sync_status(void)
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{
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sntp_sync_status_t ret_sync_status = SNTP_SYNC_STATUS_RESET;
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sntp_sync_status_t sync_status = sntp_sync_status;
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if (sync_status == SNTP_SYNC_STATUS_COMPLETED) {
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sntp_set_sync_status(SNTP_SYNC_STATUS_RESET);
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ret_sync_status = SNTP_SYNC_STATUS_COMPLETED;
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} else if (sync_status == SNTP_SYNC_STATUS_IN_PROGRESS) {
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struct timeval outdelta;
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adjtime(NULL, &outdelta);
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if (outdelta.tv_sec == 0 && outdelta.tv_usec == 0) {
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sntp_set_sync_status(SNTP_SYNC_STATUS_RESET);
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ret_sync_status = SNTP_SYNC_STATUS_COMPLETED;
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} else {
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ret_sync_status = SNTP_SYNC_STATUS_IN_PROGRESS;
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}
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}
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return ret_sync_status;
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}
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void sntp_set_sync_interval(uint32_t interval_ms)
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{
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if (interval_ms < 15000) {
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// SNTPv4 RFC 4330 enforces a minimum update time of 15 seconds
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interval_ms = 15000;
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}
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s_sync_interval = interval_ms;
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}
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uint32_t sntp_get_sync_interval(void)
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{
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return s_sync_interval;
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}
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bool sntp_restart(void)
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{
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if (sntp_enabled()) {
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sntp_stop();
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sntp_init();
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return true;
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}
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return false;
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}
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