Move time update logic from display module to time manager

components/time/time_manager.c

@@ -10,6 +10,8 @@
 
 #include "esp_log.h"
 #include "esp_sntp.h"
+#include "esp_timer.h"
+#include "fatal.h"
 #include "freertos/FreeRTOS.h"
 #include "nvs_flash.h"
 #include <time.h>
@@ -22,6 +24,12 @@
 #define TM_YEAR_OFFSET 1900
 #define TM_MONTH_OFFSET 1
 
+#define UPDATE_PERIOD_US 1000000UL
+#define MAX_CALLBACKS 8
+
+static TimeCallback callbacks[MAX_CALLBACKS];
+static unsigned callback_count;
+
 static void handle_timezone_update(const char *timezone)
 {
 	setenv("TZ", timezone, 1);
@@ -85,6 +93,13 @@ static int store_time(void)
 	return error == ESP_OK ? 0 : 1;
 }
 
+static void run_callbacks(void *arg)
+{
+	const Time time = get_time();
+	for (unsigned i = 0; i < callback_count; ++i)
+		callbacks[i](&time);
+}
+
 static int time_command_func(int argc, char **argv)
 {
 	if (argc == 1) {
@@ -177,6 +192,8 @@ static void time_saver_func(void *arg)
 
 void time_manager_init(void)
 {
+	callback_count = 0;
+
 	char timezone[SETTINGS_MAX_VALUE_SIZE];
 	(void)settings_get_timezone(timezone, SETTINGS_MAX_VALUE_SIZE);
 	handle_timezone_update(timezone);
@@ -225,6 +242,34 @@ void time_manager_init(void)
 	(void)xTaskCreate(
 	    &time_saver_func, "time saver", CONFIG_DEFAULT_TASK_STACK, NULL, 1,
 	    NULL);
+
+	// Create and start timer
+	esp_timer_handle_t update_timer;
+	const esp_timer_create_args_t update_timer_config = {
+		.callback = &run_callbacks,
+		.arg = NULL,
+		.name = "time updates",
+	};
+	error = esp_timer_create(&update_timer_config, &update_timer);
+	if (error != ESP_OK) {
+		ESP_LOGE(TAG, "Error creating update timer: %04x", error);
+		FATAL();
+	}
+	error = esp_timer_start_periodic(update_timer, UPDATE_PERIOD_US);
+	if (error != ESP_OK) {
+		ESP_LOGE(TAG, "Error starting update timer: %04x", error);
+		FATAL();
+	}
+}
+
+void add_time_callback(TimeCallback callback)
+{
+	if (callback_count >= MAX_CALLBACKS) {
+		ESP_LOGE(TAG, "Max number of time callbacks exceeded");
+		return;
+	}
+	callbacks[callback_count] = callback;
+	++callback_count;
 }
 
 Time get_time(void)