thankssssssssssssssssssssssssss a lot really you both helped me alot i was really in a trouble and i will work on this data and hoping to acheive the result soon and sorry if i make a disturbance again as i will of course face trouble
but in adxl345 i found delay time between samples is 5us between two samples i think this is the time use in the integeration (base) to calculate area under the curve ... is this right or i use some of pic timer as rayan said to know exactly the time between samples ..