ADXL355用的是 ADXL355-PMDZ板，该传感器共有12个引脚。
引脚的关系如下：
1 芯片选择（SCL）；2 MOSI（SDA为I2C通信的引脚）；
3 MISO； 4 串行时钟（SCLK）；
5 接地（GND）； 6 数字电源（VCC）；
Arduino UNO R3上的引脚：
1连7,2连11,3连12,4连13.
电源接3.3V，接地直接接地。 在这里插入代码片 #include // Memory register addresses: const int XDATA3 = 0x08; const int XDATA2 = 0x09; const int XDATA1 = 0x0A; const int YDATA3 = 0x0B; const int YDATA2 = 0x0C; const int YDATA1 = 0x0D; const int ZDATA3 = 0x0E; const int ZDATA2 = 0x0F; const int ZDATA1 = 0x10; const int RANGE = 0x2C; const int POWER_CTL = 0x2D; // Device values const int RANGE_2G = 0x01; const int RANGE_4G = 0x02; const int RANGE_8G = 0x03; const int MEASURE_MODE = 0x06; // Only accelerometer // Operations const int READ_BYTE = 0x01; const int WRITE_BYTE = 0x00; // Pins used for the connection with the sensor const int CHIP_SELECT_PIN = 7; void setup() { Serial.begin(9600); SPI.begin(); // Initalize the data ready and chip select pins: pinMode(CHIP_SELECT_PIN, OUTPUT); //Configure ADXL355: writeRegister(RANGE, RANGE_2G); // 2G writeRegister(POWER_CTL, MEASURE_MODE); // Enable measure mode // Give the sensor time to set up: delay(100); } void loop() { int axisAddresses[] = {XDATA1, XDATA2, XDATA3, YDATA1, YDATA2, YDATA3, ZDATA1, ZDATA2, ZDATA3}; int axisMeasures[] = {0, 0, 0, 0, 0, 0, 0, 0, 0}; int dataSize = 9; // Read accelerometer data readMultipleData(axisAddresses, dataSize, axisMeasures); // Split data int xdata = (axisMeasures[0] >> 4) + (axisMeasures[1] << 4) + (axisMeasures[2] << 12); int ydata = (axisMeasures[3] >> 4) + (axisMeasures[4] << 4) + (axisMeasures[5] << 12); int zdata = (axisMeasures[6] >> 4) + (axisMeasures[7] << 4) + (axisMeasures[8] << 12); // Apply two complement if (xdata >= 0x80000) { xdata = ~xdata + 1; } if (ydata >= 0x80000) { ydata = ~ydata + 1; } if (zdata >= 0x80000) { zdata = ~zdata + 1; } // Print axis Serial.print("X="); Serial.print(xdata); Serial.print(" "); Serial.print("Y="); Serial.print(ydata); Serial.print(" "); Serial.print("Z="); Serial.print(zdata); Serial.print(" "); // Next data in 100 milliseconds delay(100); } /* * Write registry in specific device address */ void writeRegister(byte thisRegister, byte thisValue) { byte dataToSend = (thisRegister << 1) | WRITE_BYTE; digitalWrite(CHIP_SELECT_PIN, LOW); SPI.transfer(dataToSend); SPI.transfer(thisValue); digitalWrite(CHIP_SELECT_PIN, HIGH); } /* * Read registry in specific device address */ unsigned int readRegistry(byte thisRegister) { unsigned int result = 0; byte dataToSend = (thisRegister << 1) | READ_BYTE; digitalWrite(CHIP_SELECT_PIN, LOW); SPI.transfer(dataToSend); result = SPI.transfer(0x00); digitalWrite(CHIP_SELECT_PIN, HIGH); return result; } /* * Read multiple registries */ void readMultipleData(int *addresses, int dataSize, int *readedData) { digitalWrite(CHIP_SELECT_PIN, LOW); for(int i = 0; i < dataSize; i = i + 1) { byte dataToSend = (addresses[i] << 1) | READ_BYTE; SPI.transfer(dataToSend); readedData[i] = SPI.transfer(0x00); } digitalWrite(CHIP_SELECT_PIN, HIGH); } 接上之后，就能在串口上看到数据了。如图：