File content as of revision 0:371be129802f:

/*Program Example 7.4: Reads values from accelerometer through SPI, and outputs 
continuously to terminal screen.
*/

#include "mbed.h"
SPI acc(p11,p12,p13);            // set up SPI interface on pins 11,12,13
DigitalOut cs(p14);              // use pin 14 as chip select      
Serial pc(USBTX, USBRX);         // set up USB interface to host terminal
char buffer[6];                  //raw data array type char
int16_t data[3];                 // 16-bit twos-complement integer data
float x, y, z;                   // floating point data, to be displayed on-screen

int main() {
  cs=1;                        //initially ADXL345 is not activated
  acc.format(8,3);             // 8 bit data, Mode 3
  acc.frequency(2000000);      // 2MHz clock rate
  cs=0;                        //select the device
  acc.write(0x31);             // data format register
  acc.write(0x0B);             // format +/-16g, 0.004g/LSB
  cs=1;                        //end of transmission
  cs=0;                        //start a new transmission
  acc.write(0x2D);             // power ctrl register
  acc.write(0x08);             // measure mode
  cs=1;                        //end of transmission
  while (1) {                  // infinite loop
    wait(0.2);
    cs=0;                      //start a transmission
    acc.write(0x80|0x40|0x32);   // RW bit high, MB bit high, plus address
    for (int i = 0;i<=5;i++) {
      buffer[i]=acc.write(0x00);       // read back 6 data bytes
    }
    cs=1;                      //end of transmission
    data[0] = buffer[1]<<8 | buffer[0];  // combine MSB and LSB
    data[1] = buffer[3]<<8 | buffer[2];
    data[2] = buffer[5]<<8 | buffer[4];       
    x=0.004*data[0]; y=0.004*data[1]; z=0.004*data[2]; // convert to float, 
                                                       //actual g value
    pc.printf("x = %+1.2fg\t y = %+1.2fg\t z = %+1.2fg\n\r", x, y,z); //print 
  }
}