atol()函数可以将字符串转换为long类型,但需要注意,如果字符串表示的数值超出了long类型的范围,可能会导致溢出。不过,在大多数情况下,atol()已经足够使用,因为unsigned long和long在Arduino中通常具有相同的位宽。 cpp #include <Arduino.h> void setup() { Serial.begin(9600); String str = "1234567890...
[mw_shl_code=cpp,true]#include <Arduino.h> // Declared weak in Arduino.h to allow user redefinitions.int atexit(void (* /*func*/ )()) { return 0; } // Weak empty variant initialization function.// May be redefined by variant files.void init...
= = = || ! ++ -- += -= *= /= 数据类型: boolean 布尔类型 2 Arduino 手册(精要版) char byte 字节类型 int unsignedint long unsignedlong float double string array void 数据类型转换: char() byte() int() long() float() 常量: HIGH|LOW 表示数字IO 口的电平,HIGH 表示高 电平(1),...
String currentDir ="";unsignedlonglastButtonPress =0;voidsetup() {// Set encoder pins as inputspinMode(CLK,INPUT); pinMode(DT,INPUT); pinMode(SW, INPUT_PULLUP);// Setup Serial MonitorSerial.begin(9600);// Read the initial state of CLKlastStateCLK = digitalRead(CLK); }voidloop() {...
(uint8_t pin,int val);unsigned longmillis(void);unsigned longmicros(void);voiddelay(unsigned long ms);voiddelayMicroseconds(unsigned int us);unsigned longpulseIn(uint8_t pin,uint8_t state,unsigned long timeout);unsigned longpulseInLong(uint8_t pin,uint8_t state,unsigned long timeout);void...
11.10 unsigned long(无符号长整数型) 11.11 float(浮点型数) 11.12 double(双精度浮点数) 11.13 string( char array/字符串) 11.14 String object( String类) 11.15 array(数组) 十二、数据类型转换 12.1 char() 12.2 byte() 12.3int() 12.4 word() ...
#include<Arduino.h>booleanat_exec(char*data,char*keyword,unsigned long time_out){Serial.println(data);Serial.flush();delay(100);// 等待响应unsigned long start=millis();while(Serial.available()<strlen(keyword)){if(millis()-start>time_out)returnfalse;}if(Serial.find(keyword))returntrue;else...
11.4 unsigned char(无符号数据类型) 11.5 byte(无符号数) 11.6 int(整型) 11.7 unsigned int(无符号整型) 11.8 word 11.9 long(长整数型) 11.10 unsigned long(无符号长整数型) 11.11 float(浮点型数) 11.12 double(双精度浮点数) 11.13 string(char array/字符串) ...
//单位毫秒 unsigned long lastInterruptTime = 0;// 记录程序执行时间的变量 char message[50];//OLED显示存储变量,需要设置的比显示字符大,否则溢出可能会导致程序中其余变量的值被修改 const int notes[] = {Do_C, Re_D, Mi_E, Fa_F, Sol_G, La_A, Si_B}; // String Display_notes[] = {"...
int main(void){ unsigned char code[]={'2','3','3','.','1','2','3','4','6','5'};double x;sscanf((char *)code,"%lf",&x);//转换 printf("%f\n",x);//打出来看看 return 0;} 如果unsigned char code[]={2，3，3，'.'，1，2，3，4，6，5}中的数字不是...