The clock set from the home network. See wifi_ntp.h. More...

#include "wifi_ntp.h"
#include <stdint.h>
#include <sys/time.h>
#include "esp_log.h"
#include "esp_netif_sntp.h"
#include "esp_timer.h"
#include "freertos/FreeRTOS.h"
#include "wall_clock.h"

Functions
static int64_t	wall_now_us (void)
	The system time.
static void	on_sync (struct timeval *tv)
	The answer, on the TCP/IP task, after lwIP has set the clock: the old clock is the one at the start carried on by esp_timer, which the step does not move.
static void	ntp_start (void)
	Start the client, which asks at once (no start-up delay, CONFIG_LWIP_SNTP_STARTUP_DELAY off).
static void	ntp_end (void)
	Stop the client; nothing when it never started.
bool	wifi_ntp_poll (bool joined, bool lingers)
	Move the request on: start it on a join, log and end it on an answer or the time-out, end it when the join ends.
void	wifi_ntp_stop (void)
	End the request before the network interface goes: what wifi_ntp_poll(false, false) does, an answer that came first logged.

Variables
static const char *	TAG = "clock"
	The console tag of the clock's lines.
static portMUX_TYPE	s_mux = portMUX_INITIALIZER_UNLOCKED
	Guards the answer between the TCP/IP task and the worker.
static bool	s_answered
	An answer has set the clock since the start.
static int64_t	s_new_us
	The time the answer set, microseconds since 1970 UTC.
static int64_t	s_old_us
	The old clock at the answer, microseconds since 1970 UTC.
static wall_ntp_t	s_req
	This join's request (wall_clock.h).
static bool	s_running
	esp_netif_sntp_init() succeeded and no deinit followed.
static int64_t	s_base_wall_us
	The clock at the start, microseconds since 1970 UTC.
static int64_t	s_base_mono_us
	esp_timer at the start, microseconds since boot.

Detailed Description

The clock set from the home network. See wifi_ntp.h.

SPDX-License-Identifier: MIT

Function Documentation

◆ on_sync()

void on_sync ( struct timeval * tv )

static

The answer, on the TCP/IP task, after lwIP has set the clock: the old clock is the one at the start carried on by esp_timer, which the step does not move.

Parameters

tv	The time the answer set.

◆ wall_now_us()

int64_t wall_now_us ( void )

static

The system time.

Returns: Microseconds since 1970-01-01 UTC.

◆ wifi_ntp_poll()

bool wifi_ntp_poll	(	bool	joined,
		bool	lingers )

Move the request on: start it on a join, log and end it on an answer or the time-out, end it when the join ends.