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);
	}

 

[phalanx]

Here are a few suggestions/comments:

When is the dsPIC resetting? Periodically? Instantly? Every 10 minutes? When I look at it hard?....

You really need to comment your code if you want people to help you troubleshoot it. I don't have the time to decipher every line to try and understand what you are doing.

Did you shut off the watch dog timer in the configuration bits?

PICs (and most microcontrollers for that matter) cannot tolerate negative voltages on any of their pins which means you can't directly measure AC voltages. If your analog front end doesn't correct this, that could cause your device to reset.