定义函数的语法如下: typeSpecifier functionName(argList){}
1) attachInterrupt(interrupt,function,mode) 描述: 当发生外部中断时,调用一个指定的函数。这会用 新的函数取代之前指定给中断的函数。大多数的Arduino 板有两个外部中断: 0号中断(引脚2)和1号中断(引脚3), 部分不同类型Arduino板的中断及引脚关系不同。 Arduino Due有更强大的中断能力,其允许在所有的引脚上 ...
For Now Here’s the list of multi-keypress functions and the keylist definition. I will complete their descriptions this weekend. Key key[LIST_MAX] bool getKeys() bool isPressed(char keyChar) int findInList(char keyChar) Example #include <Keypad.h> const byte ROWS = 4; //four rows ...
longrandom(max)随机数返回函数,返回数据大于等于0,小于max。longrandom(min,max)随机数返回函数,返回数据大于等于min,小于max。中断使能函数interrupts()使能中断函数。放开中断功能。noInterrupts()禁 7、止中断函数。关闭中断功能。attachInterrupt(interrupt,function,mode)interrupt:中断引脚数function:中断发生时调用的...
//The setup function is called once at startup of the sketch void setup() { pinMode(BUTTON_PIN, INPUT); pinMode(LED_PIN, OUTPUT); sc_timer_service_init( &timer_service, timers, MAX_TIMERS, (sc_raise_time_event_fp) &lightCtrl_raiseTimeEvent ...
Begin a transmission to the I2C slave device with the given address. Subsequently, queue bytes for transmission with thewrite()function and transmit them by callingendTransmission(). Parameters address: the 7-bit address of the device to transmit to ...
32、max, long out_min, long out_max) return (x in_min) (out_max - out_min) / (in_max in_min) + out_min;pow()描述计算一个数的幂次方。pow()可以用来计算一个数的分数幂.这用来产生指数幂的数或曲线非常方便. 参数base:底数(float) exponent:幂(float) 返回一个数的幂次方值(double) 例...
intoldMax[20]; doublemaxInFreq; voidloop() { // 采样 for(inti = 0; i < SAMPLES; i++) { unsignedlongnewTime = micros(); intvalue = analogRead(ANALOG_PIN); vReal[i] = value; vImag[i] = 0; while(micros() < (newTime + sampling_period_us)) { ...
fix(zigbee): use correct carbon dioxide cluster function in setTolerance by @oddlama in #11015 Boards Additions & Updates fix(board): Update pins_arduino.h for Geekble_ESP32C3 by @SooDragon in #11000 fix(board): Update feathers3 wire1 pin definition by @ericlewis in #11001 feat(boards)...
in_max: 映射前区间最大值 out_min: 映射后区间最小值 out_max 映射后区间最大值 我们看一下这个程序就知道map函数的应用了:将变量analogInputVal (也就是读取到A0引脚的模拟输入值)变化范围0-1023映射到0-255范围内。 感觉挺简单的,注释就省掉了。