以下代码用 millis()函数来闪烁LED灯,如果开发板开始运行,会返回微秒的数值 /* Blink without Delay Turns on and off a light emitting diode (LED) connected to a digital pin, without using the delay() function. This means that other code can run at the same time without being interrupted by th...
Parameters of program functions: for example, in the time function: parameters of the delay function: ms: pause time, the time unit is milliseconds (unsigned long data), delay Microseconds function parameters: us: pause time, the time unit is microseconds (unsigned long data), millis, mircros...
在Arduino编程中，delay(200)会让程序暂停执行200毫秒，相当于0.2秒。这个函数常用于需要暂停一段时间的场景，比如等待传感器读数稳定或使LED闪烁。在Keil中进行调试时，如果设置断点并运行，可以准确计算出这段延迟时间的具体时长。函数delay的基本用法为void delay(unsigned milliseconds)，这里的milliseconds...
const long interval = 1000; // interval at which to blink (milliseconds) void setup() { // set the digital pin as output: pinMode(ledPin, OUTPUT); } void loop() { // here is where you'd put code that needs to be running all the time. ...
tone(9, note, 200); // Play assigned note for 200 milliseconds } delay(10); // Brief pause } 您可以将上述代码复制到您的IDE中,将其上传到Uno,如果您想运行该代码,可以继续进行下一部分,但是这部分的代码很重要,有必要对其进行分析和理解。首先: ...
Serial.setTimeout( 2500 ) ; // Timeout in milliseconds } void loop( void ) { byte Sum = 0 ; /* Try changing the values of t1, t2, t3, t4 to various combinations of true/false. 16 possible states (4**2), decimal 0 to 15, binary 0b0000 to ...
delay(ms) 延时函数(单位ms)。 delayMicroseconds(us) 延时函数(单位us)。数学函数 min(x, y) 求最小值 max(x, y) 求最大值 abs(x) 计算绝对值 constrain(x, a, b) 约束函数,下限a,上限b,x必须在ab之间才能返回。 map(value, fromLow, fromHigh, toLow, toHigh) 约束函数,value必须在fromLow与...
(milliseconds)4344voidsetup() {45//set the digital pin as output:46pinMode(ledPin, OUTPUT);47}4849voidloop() {50//here is where you'd put code that needs to be running all the time.5152//check to see if it's time to blink the LED; that is, if the difference53//between the ...
delay() 和delayMicroseconds() 是Arduino编程中常用的两个延时函数,它们用于在程序中创建暂停。以下是对这两个函数的介绍以及它们的最大延时时间: delay() 功能: delay() 函数使Arduino程序暂停一定的毫秒数。这个函数用于较长的延时。 用法: delay(milliseconds); 其中milliseconds 是要暂停的毫秒数。 特点: 在...
#include <Servo.h> class Flasher { // Class Member Variables // These are initialized at startup int ledPin; // the number of the LED pin long OnTime; // milliseconds of on-time long OffTime; // milliseconds of off-time // These maintain the current state volatile int ledState; /...