nrf51822 and adxl345 register address

[Roberto]

Hi to everyone, i have the mpu6050 code and i have to change it with parameters of adxl345.

i have this definitions:

#define ADDRESS_WHO_AM_I (0x75U) //!< WHO_AM_I register identifies the device. Expected value is 0x68.

static const uint8_t expected_who_am_i = 0x68U;

and i have the datasheet of adxl345.

www.analog.com/.../ADXL345.pdf

i compare it with the mpu6050 datasheet but i'm not sure of it.

#define ADDRESS_WHO_AM_I (0x2D) static const uint8_t expected_who_am_i 0x53

is that write? other question. what's the difference between 0x53 and 0x53U? thanks in advance

[Sigurd]

Hi,

Yes, the default device address for ADXL345 is 0x53.

The U in 0x53U means that it is an unsigned hexadecimal value. If the ‘U’ is removed then it is a signed hexadecimal value.