How to read register value from ADXL345 Eval board?

Using Arduino Sensors
13

Probably need:

    pinMode(ACCEL_CS, OUTPUT);
    pinMode(ACCEL_SCK, OUTPUT);
    pinMode(ACCEL_DI, OUTPUT);
    pinMode(ACCEL_DO, INPUT);

You don't seem to include any output in your sketch so I don't understand how you detect if it is working or not.

You can remove references to the SPI library since the adxl345_read() function does software SPI.