gettimeofday(&tv_now, NULL); int64_t time_us = (int64_t)tv_now.tv_sec * 1000000L + (int64_t)tv_now.tv_usec; return (int)(time_us/1000); } 2、延时毫秒级时间 void my_delay_ms(u32 time_ms) { vTaskDelay(time_ms / portTICK_RATE_MS); } SNTP校时 SNTP 指 简单网络时间协议(...
序列号.开始(115200); gettimeofday(&now, NULL); Serial.printf("启动 ESP32 %d\n", bootcount++); 将当前时间存储在静态存储器中。 最后= now.tv_sec; 创建一个 BLE 设备并根据需要命名。这里 ESP32 被命名为“ ESP2 as iBeacon ”。请注意,名称可以很长,但此版本的代码已开始支持长名称。 BLEDevice...
static long data_num = 0; //数据数量 static void print_speed(void) { float time_old_s = time_old.tv_sec + time_old.tv_usec / 1000000.0; float time_new_s = time_new.tv_sec + time_new.tv_usec / 1000000.0; float time_interval = time_new_s - time_old_s; float speed = data...
I'm trying to maintain a valid time stamp during deep sleep with the ESP32-C3. With settime of day I set the unix time stamp and a subsequent gettimeofday returns correctly. After a deep_sleep, the gettimeofday function returns a value of 0. Why is this happening?
但我也不确定各NTP服务提供商是按照第五版协议增加了Era字段还是盲发老款报文。 在这里写一个精确授时的,由于RTC不是原子钟是会存在温漂问题的,如果要切换RTC晶振为外部32768或者内部高频时钟,需要去找配置文件,我也没找到。 代码是详细的算出授时的时间,授时应该很准确应该能达到微秒级的准确度,但由于UDP封包存在...
void app_main() { struct timeval now; gettimeofday(&now, NULL);//获取当前时间,格式为s和us //当前时间减去进入睡眠时间就是睡眠所消耗的时间,乘以1000转换成ms int sleep_time_ms = (now.tv_sec - sleep_enter_time.tv_sec) * 1000 + (now.tv_usec - sleep_enter_time.tv_usec) / 1000; /...
gettimeofday(&tv_now, NULL); int64_t cpu_time = (int64_t)tv_now.tv_sec * 1000000L + (int64_t)tv_now.tv_usec; int64_t error_time = cpu_time + 500 * 1000L; struct timeval tv_error = { .tv_sec = error_time / 1000000L, .tv_usec = error_time % 1000000L }; settimeofday(...
gettimeofday(&tv_now, NULL); int64_t time_us= (int64_t)tv_now.tv_sec *1000000L+(int64_t)tv_now.tv_usec;returntime_us; }//按键中断处理函数staticvoidIRAM_ATTR gpio_isr_handler(void*arg) { uint32_t gpio_num=(uint32_t) arg; ...
要使用此功能,请确保Component config->ESP32-specific->菜单中的Timers used for gettimeofday function选项设置为RTC and high-resolution timer或RTC。 这是默认设置。 6. 设置多个时间服务器 可以多设置几个SNTP server, 防止某个SNTP server暂时关闭服务而导致无法同步时间。 配置多个SNTP server时,不是同时发送多...
How quickly does RTC / gettimeofday overflow? On ESP8266 it was something around 7 hours. I can't find any details on gettimeofday implementation.ESP_igrr Posts: 2073 Joined: Tue Dec 01, 2015 8:37 am Re: RTC / gettimeofday overflow...