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() 12.5 long() 12.6 float() 十三、变量作用域&修饰符 13.1 variable scope(变量的作用域) 13.2 static(静态变量) 13.3 volatile 13.4 const 十四、辅助工具 14.1sizeof() 函数部分 十五...
示例const int arraySize = 10; / constant variable indicating size of arrayint a arraySize = 87, 68, 94, 100, 83 8、, 78, 85, 91, 76, 87 ;int total = 0;void setup () void loop () / sum contents of array a for ( int i = 0; i < arraySize; +i ) total += a i ; ...
type arrayName [ arraySize ] ; 编译器保留适当的内存量(回想一下,保留内存的声明更恰当地被称为定义)。arraySize必须是大于零的整数常量。例如,要告诉编译器为整数数组C保留11个元素,请使用声明: int C[ 12 ]; // C is an array of 12 integers 数组可以声明为包含任何非引用数据类型的值。例如,可以使...
("使用A和B作为键"));dump_byte_array(key.keyByte,MFRC522::MF_KEY_SIZE);Serial.println();Serial.println(F("注意,会把数据写入到卡在#1"));}voidloop(){// 寻找新卡if(!mfrc522.PICC_IsNewCardPresent())return;// 选择一张卡if(!mfrc522.PICC_ReadCardSerial())return;// 显示卡片的详细...
drawArrayJpeg(demo_image1, sizeof(demo_image1), 0, 0); delay(1000); drawArrayJpeg(demo_image2, sizeof(demo_image2), 0, 0); delay(1000); drawArrayJpeg(demo_image3, sizeof(demo_image3), 0, 0); delay(1000); #endif }
endWriteendWrite(void) //end transaction with CS highpushColors(uint8_t *data, uint32_t len) //push an array of pixels for 16 bit raw image drawing(Assumed that setAddrWindow() has previously been called)pushColors(uint16_t *data, uint32_t len, bool swap) //push an array of ...
char input[INPUT_SIZE + 1]; // array of type char (C-string) //read Serial until new line or buffer full or time out byte size = Serial.readBytesUntil('\n', input, INPUT_SIZE); // Add the final 0 to end the C-string
StringIndexOf StringAppendOperator StringLengthTrim StringCaseChanges StringReplace StringCharacters StringStartsWithEndsWith StringComparisonOperators StringSubstring array -(数组) Arrays(数组) 数组是一种可访问的变量的集合。Arduino的数组是基于C语言的,因此这会变得很复杂,但使用简单的数组是比较简单的。
4、ned char(无符号数据类型)11.5 byte(无符号数字)11.6 int(整数)11.7 unsigned int(无符号整数)11.8 word11.9长整数类型11.10 unsigned long(无符号长整数类型)11.11 float(浮点数)11.12双精度浮点11.13字符串(char array/字符串)11.14 string object(string类)11.15 array(阵列)12、数据类型转换12.1 char()12.2...
val: a value to send as a single byte.str: a string to send as a series of bytes.buf: an array to send as a series of bytes.len: the number of bytes to be sent from the array. 由于内存中字节存放的顺序,或者说大端小端问题,实际运行上面代码后,你在串口工具中看到的字节是逆序的,也就...