0 #define KEY_LONG_TIMER 3 unsigned long Last_KeyTime = 0; unsigned long gokit_time_s(void) { return millis() / 1000; } char gokit_key1down(void) { unsigned long keep_time = 0; if (digitalRead(KEY1) == LOW) { delay(100); if (digitalRead(KEY1) == LOW) { keep_time = ...
previousMillis = 0; } v oid Update() { // check to see if it's time to change the state of the LED unsigned long currentMillis = millis(); if((ledState == HIGH) && (currentMillis - previousMillis >= OnTime)) { ledState = LOW; // Turn it off previousMillis = currentMillis;...
问使用pymodbus作为串行/RTU主机运行ArduinoModbus的Modbus丢失字节错误EN在现代工业自动化系统中，PLC（...
点击File-Examples-01.Basics-Blink，加载程序如下：/* Blink Turns an LED on for one second, then off for one second, repeatedly. Most Arduinos have an on-board LED you can control. On the UNO, MEGA and ZERO it is attached to digital pin 13, on MKR1000 on pin 6. LED_BUILTIN ...
lastMillis = millis(); printHours(); printMinutes(); } void loop() { if ((uint32_t)(millis() - lastMillis) >= 1000) { lastMillis += 1000; if (++seconds > 59) { seconds = 0; if (++minutes > 59) { minutes = 0;
oldtime=millis(); } } ②外部中断:计数的方法 如图: 假设希望计算A在某一段时间内的脉冲,需要知道何时产生脉冲(脉冲的上升沿在哪里) 因此检测边沿可用外部中断→出现一次下降沿就调用一次中断函数 //外部中断intENC A=2;//电机的编码器A端intENC_B=3;//电机的编码器B端intcount =0;//上升沿(脉冲)数量...
oled模块 Ardunio Uno GND---GND接地线 VCC---5V 接电源 SDA---A4 SCL --- A5 */ #include "ssd1306.h" uint32_t lastMillis; uint8_t hours = 10; uint8_t minutes = 02; uint8_t seconds = 0; void printSeconds() { if (seconds & 1) { ssd1306_printFixed(54, 2, ":", STYLE_...
esp8266.print(command);// 将读取字符发送到ESP8266longinttime =millis();while((time + timeout) >millis()) {while(esp8266.available()) {// ESP有数据,因此将其输出显示到串行窗口charc = esp8266.read();//读下一个字符。response += c; ...
millis() 返回重启(reset)后所经过的毫秒数。 micros() 返回重启(reset)后所经过的微秒数 温馨提示 通常,我们控制LED灯闪烁都会加上一个delay延时来达到切换亮灭时间长度。但是delay有个缺点就是:在给定的时间间隔内是不能做其他操作,这样对于一些需要...
array, DP numbers my_device.set_dp_cmd_total(dp_array, 3); //register DP download processing callback function my_device.dp_process_func_register(dp_process); //register upload all DP callback function my_device.dp_update_all_func_register(dp_update_all); last_time = millis()...