136 lines
4.3 KiB
C
136 lines
4.3 KiB
C
/*
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* Simple test using LWIP SNTP
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*/
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/*-
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* Copyright (c) 2018, Jeff Kletsky
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of the copyright holder nor the
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* names of its contributors may be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <esp8266.h>
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#include <esp/uart.h>
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#include <FreeRTOS.h>
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#include <task.h>
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/* espressif/esp_system.h uses "bool" but fails to #include */
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#include <stdbool.h>
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#include <espressif/esp_common.h>
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#include <espressif/esp_wifi.h>
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/* For sdk_system_restart_in_nmi() */
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#include <esplibs/libmain.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <lwip/apps/sntp.h>
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#define BLUE_LED 2
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#define LED_ON 0
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#define LED_OFF 1
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#define WAIT_FOR_UART_SECS 5 /* 2 might be OK */
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#define TV2LD(TV) ((long double)TV.tv_sec + (long double)TV.tv_usec * 1.e-6)
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void
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sntp_task(void *pvParameters) {
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while (sdk_wifi_station_get_connect_status() != STATION_GOT_IP) {
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vTaskDelay(10);
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};
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/*
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* Set one of SNTP_OPMODE_LISTENONLY or SNTP_OPMODE_POLL
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*/
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/*
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* SNTP_OPMODE_LISTENONLY
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* just needs the mode set, no server names required
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* (requires broadcast NTP on your network)
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*/
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sntp_setoperatingmode(SNTP_OPMODE_LISTENONLY);
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/*
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* SNTP_OPMODE_POLL
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* Needs one or more server names set
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* additional servers are "fail over"
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* Can use a DNS name or an address literal
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* LWIP can also be configured with SNTP_GET_SERVERS_FROM_DHCP
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* (DHCP-specified SNTP servers untested at this time)
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*
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* NOTE: Early testing with polling shows higher deviations
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* than seen with broadcast, even with RTT compensation
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* Cause unknown at this time, but believed to be within SNTP
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* amd not part of timekeeping itself.
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*/
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/*
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sntp_setoperatingmode(SNTP_OPMODE_POLL);
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sntp_setservername(0, "ntp_a.example.com");
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sntp_setservername(1, "ntp_b.example.com");
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sntp_setservername(2, "ntp_c.example.com");
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*/
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/* Once set up, this is all it takes */
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sntp_init();
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/*
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* Have high-priority thread "parked", might as well use it
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* Show calling gettimeofday() once an hour to check for timer wrap
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* (the SNTP process itself, if connected, should be sufficient)
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*/
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while (1) {
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vTaskDelay(60 * 60 * (1000 / portTICK_PERIOD_MS));
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printf("gettimeofday(NULL, NULL)\n");
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gettimeofday(NULL, NULL);
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}
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}
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void
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user_init(void)
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{
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uart_set_baud(0, 115200);
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sdk_wifi_set_opmode(STATION_MODE);
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/*
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* Run at a high enough priority so that the initial time-set doesn't get interrupted
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* Later calls and listen-only mode calls run in the high-priority "tcpip_thread" (LWIP)
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*
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* While 196 heap seemed sufficient for many tests, use of an NTP pool
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* with DNS caused heap errors/warnings on starting NTP at 256 heap
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*/
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xTaskCreate(sntp_task, "SNTP task", 288, NULL, 6, NULL);
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}
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