Phase shift of the AC current signal with Arduino

time taken to collect two samples

116 us

shiftvalue = V2 -V1/116us

for (int i ;i=172;i++){
TimeA =micros();
data[i]=anlogReading(A0);
TimeB[i]=micros()-TimeA;
}


for (int i ;i=172;i++){

Phase[i] = data[i]-data[i-1]/TimeB[i];

# Need to find phase shift of each values 
# to keep constant value to phase we need to add some corrective value to the main  value 
# How to get phase value  
# Normally to cover 360 deg it take 20 ms 
if  add each value of Phase  to complete 360 deg , time taken , are equivalent to 20 ms then same in the correct track . to adjust need to add some corrective values to each phase to get close to main value . 

}

Simple way of getting sample value 
# This can be in Setup() 
for (int i ;i=10;i++){
TimeA =micros();
data=anlogReading(A0);
TimeB[i]=micros()-TimeA;
}

for (int i ;i=0.02*1000/(Average Of TimeB[]);i++){
TimeA =micros();
data[i]=anlogReading(A0);
TimeB[i]=micros()-TimeA;
}