unsigned char z1=2,z2=255,x1,x2=0;
unsigned char raw_data[6];
raw_data[0]=x1;
raw_data[1]=x2;
raw_data[4]=z1;
raw_data[5]=z2;
acc->x = ((int)raw_data[1] << 8) | (raw_data[0] & 0xFF);//73 - normal
acc->z = ((int)raw_data[5] << 8) | (raw_data[4] & 0xFF);//65282 - not normal