Dspic30f2010 Reset Problem

[rmrps]

Hi Friends I am using dspic30f2010 microcontroller with 12.288Mhz i want to sense the ac voltage this is my code in that i am using timer interrupt for sense the analog input the problem is the devise get reset please give me the suggestion where to change the code also give me the suggestion some other methods to sense the ac voltage thanks in advance

int main(void)
{

TRISB=0xFF;
TRISE=0x00;
Lcd_Initialize() ;

ADCON1 = 0;
ADCON2 = 0;
ADCON3 = 0x9;
ADPCFG = 0x0;
ADCHS = 0x07;
ADCON1bits.ADON = 1;

R_Ph_Rms_Vol=0;
Phase_interrupt =0;

T1CON=0;
TMR1=0;
PR1=16000;
IFS0bits.T1IF=0;
IPC0bits.T1IP=4;
IEC0bits.T1IE=1;
T1CONbits.TCS = 0;
T1CON=0x8000;

while(1)
{

if(Time_Update==1)
{

for(R_i=0;R_i<20;R_i++)
{
R_Ph_Voltage[R_i] = R_Ph_Voltage[R_i]-512;
R_Ph_Ana_Vol[R_i] = (R_Ph_Voltage[R_i]*5.0)/1023.0;
R_Ph_Ana_Vol[R_i] = R_Ph_Ana_Vol[R_i] * R_Ph_Ana_Vol[R_i];
}
R_Ph_Rms_Vol = 0;

for(R_i=0;R_i<20;R_i++)
{
R_Ph_Rms_Vol = R_Ph_Rms_Vol + R_Ph_Ana_Vol[R_i];
}
R_Phase = R_Ph_Rms_Vol; R_Phase = sqrt(R_Phase/20.0);
R_Phase = R_Phase *284.00;
Phase1 = (int)R_Phase;

R_Ph_Rms_Vol=0;
Phase_interrupt =0;

k=Phase1;
l=k/1000; Status1[6] = l + 48; k=k%1000;
l=k/100; Status1[7] = l + 48; k=k%100;
l=k/10; Status1[8] = l + 48; k=k%10;
Status1[9] = k + 48;

Lcd_Command(0x80);
for(l=0;l<=18;l++)
{
Lcd_Send_data(Status1[l]);
}
Time_Update = Time_Update & 0x01;

}
}
return (0);

}


void __attribute__((interrupt,auto_psv)) _T1Interrupt(void)
{
IFS0bits.T1IF = 0;
if(Phase_interrupt!=20)
{
R_Ph_Voltage[Phase_interrupt] = Read_Adc(0);
Phase_interrupt++;
}
}

int Read_Adc(int channel)
{
unsigned char Delay=0;
if(channel > 0x000F) return(0);
ADCHS = channel;
ADCON1bits.SAMP = 1;
for(Delay = 0; Delay < 5; Delay++);
IFS0bits.ADIF = 0;
ADCON1bits.SAMP = 0;
while(!IFS0bits.ADIF);
return(ADCBUF0);
}