12 years, 5 months ago.

How to realize communication between MSP430F5438A and ADXL345

Hi!

/media/uploads/roc_Sa/10.5.2013_acc_spi_code_15.28.txt Thanks for the hints and the critic. I found the Basic example Code from Sparkfun and I am trying to adjust the Code for my MSP430, but I have

got some problems. I defined the Buffer, but I am getting confused with the data of 10 bits from the accelerator.

I added a line for every value in the Interruptroutine. Please check this.

This buffer will hold values read from the ADXL345 registers.

char values[10];

These variables will be used to hold the x,y and z axis accelerometer values.

int x,y,z;

(Copied from the Basis Code)

I do not how I can built the stuff down below into my code. Can you give me some help?

The ADXL345 gives 10-bit acceleration values, but they are stored as bytes (8-bits). To get the full value, two bytes must be combined for each axis.

The X value is stored in values[0] and values[1].

x = ((int)values[1]<<8)|(int)values[0];

The Y value is stored in values[2] and values[3].

y = ((int)values[3]<<8)|(int)values[2];

The Z value is stored in values[4] and values[5].

z = ((int)values[5]<<8)|(int)values[4];

I want to know how to implement the shift operations and afterwards the reading operation for my MSP430 in my existing code. Can I put the

shift operation in the interrupt routine?

Thanks and greetings