value1 - value2; result = value1 * value2; result = value1 / value2; Parameters: value1: 任何常量或者变量,value2: 任何常量或者变量 编程小提示 整型常量的默认值是 int 类型,所以一些整型常量(定义中)的计算会导致溢出.(比如: 60 * 1000 会得 到一个负数结果.那么 if(601000>0),if得到的是一...
return value; // 两种形式均可 参数 value:任何变量或常量的类型 例子 一个比较传感器输入阈值的函数 int checkSensor(){ //这儿定义了一个整数形函数checkSensor if (analogRead(0) > 400) { //如果读取0针脚的数据大于400的话 return 1;} //返回1,相当于调用这个函数后得到的值是1 else{ return 0; ...
// Check for originalMin > originalMax - the math for all other cases i.e. negative numbers seems to work out fine if (originalMin > originalMax ) { return 0; } if (invFlag == 0){ rangedValue = (pow(normalizedCurVal, curve) * NewRange) + newBegin; } else // invert the rang...
azimuth = compass.getAzimuth(); charmyArray[3]; getDirection(myArray, azimuth); Serial.print(myArray[0]); Serial.print(myArray[1]); Serial.print(myArray[2]); Serial.println(); } 6、更改I2C地址 要在调用compass.setADDR(BYTE_VALUE);之前更改I2C地址呼叫,compass.init();如下所示: 1 2 3...
if (rtn <= RTN_CHECK) { uint8_t pin = count%4; // ping-pong string selection so displayed string is not modified. uint8_t n = count%2; str[n] = "ADC" + String(pin) + ": " + analogRead(pin) + ", "; // Should check for error. Return of false indicates error. oled....
value } Wire.requestFrom(address, numBytes); // all bytes are returned in requestFrom // check to be sure correct number of bytes were returned by slave if (numBytes < Wire.available()) { Firmata.sendString("I2C: Too many bytes received"); } else if (numBytes > Wire.available()) { ...
// See above for definition of RTN_CHECK. if (rtn <= RTN_CHECK) { uint8_t pin = count%4; // ping-pong string selection so displayed string is not modified. uint8_t n = count%2; str[n] = "ADC" + String(pin) + ": " + analogRead(pin) + ", "; ...
value back to ENABLE register */ if ( !wireWriteDataByte(APDS9930_ENABLE, reg_val) ) { return false; } return true; } /** @brief Starts the light (Ambient/IR) sensor on the APDS-9930 @param[in] interrupts true to enable hardware interrupt on high or low light @return True if ...
();// If connection is lost, reset the data. It prevents unwanted behavior, for example if a drone jas a throttle up, if we lose connection it can keep flying away if we dont reset the function}// Check whether there is data to be receivedif(radio.available()){radio.read(&data,...
(isButtonPressed()){default:break;caseCONNECT_PRESSED:if(!GoPRO.checkConnection()){if(GoPRO.begin(ssid,pass)){digitalWrite(connectLED,HIGH);}else{digitalWrite(connectLED,LOW);}}else{digitalWrite(connectLED,HIGH);}break;caseON_PRESSED:if(GoPRO.checkConnection()){onStatus=!onStatus;if(onStatus...