I am changing the phase of signal from 0 to 360 by each degree to get max voltage value.Because if i change phase of the signal the voltage also changes.I have the fallowing code to find max value. and corresponding phase

```
void Maxphase(float *max, unsigned int *index)
{
*max = 0.0;
float value;
unsigned int i, data;
for (i=0;i<=360;i++)
{
phaseset(i);
delay_ms(100);
data = readvalue();
value = voltage(mux1);
if(value > *max) //find max value
{
*max = value; //max voltage
*index = i;
}
}
}
```

from the above code I am getting Max value(voltage) after 38 sec(360*100) because for every read operation my device needs 100ms delay. This is too large, I can't change hardware thus i want to get the max value within 2 to 3 sec by optimizing software.

then I have tried with the fallowing code.

```
void Maxphase(float *max1, unsigned int *index1)
{
max = 0.0;
float value;
unsigned int i,j,data;
for (i=0;i<360;i+=10)
{
phaseset(i);
delay_ms(100);
data = readvalue();
value = voltage(mux1);
if(value > max) //find max value
{
max = value; //max voltage
index = i;
}
}
*max1=max;
*index1=index;
for (i=*index1-9;i<=*index1+9;i+=1)
{
j=i;
phaseset(j);
delay_ms(100);
data = readvalue();
value = voltage(mux1);
if(value > *max1) //find max value
{
*max1 = value; //max voltage
*index1 = i;
}
}
}
```

I have reduced time from 45 sec to 7 sec. i have reduced iterations 360 to 54(54*100). I want to reduce it 7 sec to 2 sec.

Can any one help me with better program that i can get max value from (0 to 360) with in 2 to 3 sec.

I have measured the voltage values using scope by changing phase. I have written below how it vary voltage with phase.

```
Phase (degree) voltage(max)
0 0.9mv
45 9.5mv
90 9.0mv
135 0.9mv
180 292mv
225 601mv
270 555mv
315 230mv
360 0.9mv
```

I am new to C programming. Can anyone provide sample code.