If 语句 它采用括号中的表达式,后面跟随语句或语句块。如果表达式为真,则执行语句或语句块,否则跳过这些语句。 If … else 语句 一个if语句后面可以跟随一个可选的else语句,当表达式为false时执行。 If … else if … else 语句 if语句后面可以跟随一个可选的else if ... else语句,其对于测试各种条件非常有...
Codes in the body of theifstatement andif-elsestatement don’t run. Below is an example showing how to use theif-else-ifstatement: intMarks=95;char Grade;voidsetup(){Serial.begin(9600);if(Marks<=33){Grade='E';}elseif(Marks<=40){Grade='D';}elseif(Marks<=60){Grade='...
If the switch on DP2 is open it returns 0 or false - thus "else" is executed and LED1 is turned OFF. LED1 is only ON while S1 is pressed by returning a 1 when called. void loop() { delay(100); if ( S1() ) digitalWrite(LED1, 1); if ( S2() ) digitalWrite(LED1, 0); ...
voidattendance(intid) {intuser=0,eepLoc=0;if(id==1) { eepLoc=0; user=user1++; }elseif(id==2) { eepLoc=210; user=user2++; }elseif(id==3) ... ... ... 给定功能用于从EEPROM获取数据并发送到串行监视器 voiddownload(inteepIndex) {if(EEPROM.read(eepIndex) !=0xff) { Serial....
{ if (gaMotorType[i - 1] == "D") { // Init DC Motor gaM[i - 1].Init(i, gaMotorType[i - 1], gaBolVSpeed[i - 1], gaMDir[i - 1], gaInput1PIN[i - 1], gaInput2PIN[i - 1]); } else if (gaMotorType[i - 1] == "E") { gaM[i - 1].Init(i, gaMotorType[...
pin connected to the DHT sensor #define DHTTYPE DHT11 // DHT 22 (AM2302)DHT_Unified dht(DHTPIN, DHTTYPE);包括库函数的头文件初始化针脚位数字接法对象实体int time;uint32_t delayMS;初始化串口通信参数Serial.begin(9600);dht.begin();Serial.println(F("DHTxx Unified Sensor Example"));se...
这里就直接放上max7219.h、max7219.cpp文件。另存后压缩为压缩包,再进行库文件的安装。 【另存为:max7219.h】 #ifndef max7219_h#define max7219_h#if (ARDUINO >= 100)#include<Arduino.h>#else#include<WProgram.h>#endif//MAX7219#define REG_DECODE 0x09#define REG_INTENSITY 0x0a#define REG_SCAN_LIMI...
if(ITerm > outMax) ITerm= outMax;elseif(ITerm < outMin) ITerm= outMin;// 求出两个被控量之间偏差,也就是在计算周期(这里不用采用周期是因为计算周期可能会超过采样周期)被控量的变化。// 其实就是微分项的 因子,但是看起来和标准表达式也不一样啊!!!// 。。。一两句也说不清楚,总的来说是为了...
if ( !strcmp_P(str, IDN) ) { wifi.send(msg.channel, “ESP8266wifi Example”); } // Reset system by temp enable watchdog else if ( !strcmp_P(str, RST) ) { wifi.send(msg.channel, “SYSTEM RESET.。。”); // soft reset by reseting PC ...
/* Arduino DC Motor Control - PWM | H-Bridge | L298N - Example 01 */ #define enA 9 #define in1 6 #define in2 7 #define button 4 int rotDirection = 0; int pressed = false; void setup() { pinMode(enA, OUTPUT); pinMode(in1, OUTPUT); ...