Part Number: MSP430G2553
Dear Sir,
One of my client doing Ac Extension box (defense Project). Now developing 5 boards for testing ... each board read frequency counts varied. we try that lot of way but still same issue coming .... Other parameters reading properly...
we are using 1 MHz clock for all , and timer A using SMCLK(1MHZ) capture mode (TA1.0)
Please give the solution . i am also attached circuit and codes.
Best Regards,
Muthu S 
//************************Project Name : JUNCTION BOX **************************
//************************Start Date : 09/11/17 **************************
//************************Author Name : B.Hariprasath & Enphiniti Team*********
//************************Client Name : Enphiniti Engineering ****************
//******************************************************************************
//Version History
//Version 1.0 09/11/17
//Low voltage and high voltage read via adc
//low earthleak and high earth leak read via adc
//low load current and high load current read via adc or i/o pins
//low frequency and high frequency read via timer capture method (1Mhz frequency)
//==============================================================================
//Header file added
#include <msp430g2553.h>
#include "main.h"
#include <math.h>
//==============================================================================
// Pre define variable added
//board 1 frequency
#define LOW_FREQUENCY 21276
#define HIGH_FREQUENCY 18867 // Timer capture falling edge
/*
//board 2 frequency
#define LOW_FREQUENCY 21276
#define HIGH_FREQUENCY 18867 // Timer capture falling edge
//board 3 frequency
#define LOW_FREQUENCY 21276
#define HIGH_FREQUENCY 18867 // Timer capture falling edge
//board 4 frequency
#define LOW_FREQUENCY 21276
#define HIGH_FREQUENCY 18867 // Timer capture falling edge
//board 5 frequency
#define LOW_FREQUENCY 21276
#define HIGH_FREQUENCY 18867 // Timer capture falling edge
*/
//==============================================================================
#define LOW_VOLTAGE 620 //low voltage -200v ,ADC count Max =1023
#define HIGH_VOLTAGE 790 // High voltage-250V
#define SET_LOAD 475 // Max load 16A
#define EARTHLEAK 650 // Earth Lead MAx 5v
#define RESET_SWITCH P1IN & BIT5
//==============================================================================
// interrupt
#pragma vector=TIMER0_A0_VECTOR
__interrupt void Timer_A (void);
#pragma vector=TIMER1_A0_VECTOR
__interrupt void Timer1_A (void);
#pragma vector=ADC10_VECTOR
__interrupt void ADC10_ISR(void);
//==============================================================================
//software bool variable
_Bool SET_FREQUENCY;
_Bool VOLTAGE_RELAY,EARTHLEAK_RELAY,LOAD_RELAY,FREQUENCY_RELAY;
_Bool OVER_LOAD_STATUS;
//==============================================================================
//Variable declaration
unsigned int Adc_dataout[6],temp_voltage,temp_earth;
unsigned char Adc_count,capture_count;
unsigned int avr_earthvalue, avr_load, avr_voltage;
unsigned int frequency_value,over_load,voltage,earth_leak;
unsigned int freq_timer_count,first_rise_count,second_rise_count,buffer[4];
long total_frequency;
//long first_frequency,second_frequency;
//==============================================================================
int main()
{
WDTCTL = WDTPW + WDTHOLD;
System_Initialize();
variable_inialize();
capture_count=0;
//Power on Initialize
RELAY_OFF;
UNDER_VOLTAGE_LED_OFF;
OVER_VOLTAGE_LED_OFF;
EARTH_LEAKAGE_LED_OFF;
UNDER_FREQUENCY_LED_OFF;
OVER_FREQUENCY_LED_OFF;
OVER_LOAD_LED_OFF;
ALL_STATUS_LED_ON;
time_delay(3000);
Adc_4channel_read();
Adc_4channel_read();
Adc_4channel_read();
RELAY_ON;
SET_FREQUENCY=0;
freq_timer_count=0;
CCTL1 = CCIE;
while(1)
{
if(!(RESET_SWITCH)) // its overload reset switch
OVER_LOAD_STATUS=0;
time_delay(50);
adc_data_monitoring();
// time_delay(100);
if(!(OVER_LOAD_STATUS))
{
if(SET_FREQUENCY)
{
SET_FREQUENCY=0;
frequency_validate();
}
}
}
}
//==============================================================================
void frequency_validate(void)
{
if(frequency_value < HIGH_FREQUENCY)
{
RELAY_OFF;
OVER_FREQUENCY_LED_ON;
UNDER_FREQUENCY_LED_OFF;
ALL_STATUS_LED_OFF;
FREQUENCY_RELAY=1;
}
else if(frequency_value > LOW_FREQUENCY)
{
RELAY_OFF;
OVER_FREQUENCY_LED_OFF;
UNDER_FREQUENCY_LED_ON;
ALL_STATUS_LED_OFF;
FREQUENCY_RELAY=1;
}
else //if((frequency_value > HIGH_FREQUENCY)&&(frequency_value < LOW_FREQUENCY))
{
if((VOLTAGE_RELAY)||(EARTHLEAK_RELAY)||(LOAD_RELAY))
{
RELAY_OFF;
ALL_STATUS_LED_OFF;
}
else
{
RELAY_ON;
ALL_STATUS_LED_ON;
}
FREQUENCY_RELAY=0;
OVER_FREQUENCY_LED_OFF;
UNDER_FREQUENCY_LED_OFF;
}
}
//==============================================================================
void time_delay(int invalue)
{
unsigned int i;
do
{
for (i=0;i<500;i++);
}while(--invalue);
}
//------------------------------------------------------------------------------
void variable_inialize(void)
{
Adc_dataout[0] =0;
Adc_count=0;
avr_earthvalue=avr_load= avr_voltage=0;//avr_frequency=0;
frequency_value=0;
freq_timer_count=0;
SET_FREQUENCY=0;
OVER_LOAD_STATUS=0;
VOLTAGE_RELAY=EARTHLEAK_RELAY=LOAD_RELAY=FREQUENCY_RELAY=0;
capture_count=0;
//first_frequency=second_frequency=0;
first_rise_count = second_rise_count = 0;
temp_voltage=0;
temp_earth=0;
total_frequency=0;
}
//==============================================================================
void System_Initialize()
{
Port_Initialize();
Clock_Initialize();
TimerA_Initialize();
Adc_10init();
}
//==============================================================================
void Port_Initialize(void)
{
P1SEL = 0x00;
P1DIR = 0xC0;
P1REN |= BIT5;
P2SEL = 0x01;
P2DIR = 0xFE;
}
//==============================================================================
void Clock_Initialize(void)
{
if (CAL_BC1_1MHZ==0xFF) // If calibration constant erased
{
while(1); // do not load, trap CPU!!
}
DCOCTL = 0; // Select lowest DCOx and MODx settings
BCSCTL1 = CAL_BC1_1MHZ; // Set DCO
DCOCTL = CAL_DCO_1MHZ; // smclk - 12Mhz Aclk -12MHZ
}
//==============================================================================
void TimerA_Initialize(void) //timer set 100us contmode
{
TA1CTL |= TASSEL_2 + MC_2 ; // SMCLK + Continuous mode
TA1CCTL0 |= CM_1 + CCIS_0 +SCCI+ SCS + CAP + CCIE ; // Raising Edge + CCI0A + Sync + Capture Mode + Interrupt enable
_BIS_SR(GIE); //SMCLK active + Interrupts
}
//==============================================================================
#pragma vector=TIMER1_A0_VECTOR
__interrupt void TIMER1_A0(void)
{
/*
freq_timer_count++;
freq_timer_count &= 0x03;
if(freq_timer_count == 1)
{
first_rise_count=TA1CCR0;
}
else if(freq_timer_count == 2)
{
second_rise_count = TA1CCR0;
TA1CCR0=0;
TA1CTL &= ~TAIFG;
TA1CCTL0 &= ~CCIFG;
frequency_value = second_rise_count - first_rise_count;
SET_FREQUENCY=1;
}
*/
first_rise_count = TA1CCR0; //TACCR1;
if(first_rise_count < second_rise_count)
{
buffer[capture_count++] = ((0xFFFF - second_rise_count) + first_rise_count);
}
else
{
buffer[capture_count++] = first_rise_count - second_rise_count;
}
second_rise_count = first_rise_count;
if (capture_count>4)
{
buffer[0] = buffer[3];
for(char i=0;i<4;i++)
total_frequency += buffer[i];
frequency_value = total_frequency / 4;
SET_FREQUENCY=1;
buffer[0] = 0;
total_frequency=0;
capture_count=0;
}
TA1CTL &= ~TAIFG;
TA1CCTL0 &= ~CCIFG;
}
//==============================================================================
void Adc_10init(void)
{
ADC10CTL1 = INCH_5 + CONSEQ_1; // A5/A4/A3/A2/A1/A0, single sequence
ADC10CTL0 = ADC10SHT_2 | MSC | ADC10ON; //+ ADC10IE;
ADC10DTC1 = 0x06; // 5 conversions
ADC10AE0 |= 0x1F; // P1.5,4,3,2,1,0 ADC10 option select
__delay_cycles(75);
}
//==============================================================================
void Adc_4channel_read(void)
{
ADC10CTL0 |= ENC + ADC10SC; // Sampling and conversion start
while (ADC10CTL1 & BUSY); // Wait if ADC10 core is active
ADC10SA = (int)Adc_dataout; // Data buffer start
ADC10CTL0 &= ~ENC;
adc_delay();
adc_delay();
adc_delay();
}
//==============================================================================
void adc_delay(void)
{
unsigned char i;
for(i=0;i<15;i++)
{
_NOP();
_NOP();
_NOP();
_NOP();
_NOP();
}
}
//==============================================================================
void adc_data_monitoring(void)
{
//VOLTAGE_RELAY=EARTHLEAK_RELAY=LOAD_RELAY=FREQUENCY_RELAY=0;
if(Adc_count < 16)
{
Adc_4channel_read();
if(Adc_dataout[5] > temp_voltage)
{
temp_voltage = Adc_dataout[5];
avr_voltage = Adc_dataout[5]; //A0
}
// avr_voltage += Adc_dataout[5]; //A0
avr_load += Adc_dataout[2]; //A3
//avr_earthvalue += Adc_dataout[1]; // A4
if(Adc_dataout[1] > temp_earth)
{
temp_earth = Adc_dataout[1];
avr_earthvalue =Adc_dataout[1];
}
//avr_frequency += Adc_dataout[0]; // A5
Adc_count++;
}
else
{
Adc_count=0;
temp_voltage=0;
temp_earth=0;
over_load = avr_load >> 4;
earth_leak = avr_earthvalue; //avr_earthvalue >> 2;
voltage = avr_voltage ; //;>> 3;
if(!(OVER_LOAD_STATUS))
{
if(over_load > SET_LOAD)
{
ALL_STATUS_LED_OFF;
OVER_LOAD_LED_ON;
OVER_LOAD_STATUS =1;
LOAD_RELAY=1;
}
else
{
if((VOLTAGE_RELAY)||(EARTHLEAK_RELAY)||(FREQUENCY_RELAY))
{
RELAY_OFF;
ALL_STATUS_LED_OFF;
}
else
{
RELAY_ON;
ALL_STATUS_LED_ON;
}
LOAD_RELAY=0;
OVER_LOAD_LED_OFF;
}
}
// earth leakage checking
if(earth_leak > EARTHLEAK)
{
RELAY_OFF;
ALL_STATUS_LED_OFF;
EARTH_LEAKAGE_LED_ON;
EARTHLEAK_RELAY=1;
}
else
{
if((LOAD_RELAY)||(VOLTAGE_RELAY)||(FREQUENCY_RELAY))
{
RELAY_OFF;
ALL_STATUS_LED_OFF;
}
else
{
RELAY_ON;
ALL_STATUS_LED_ON;
}
EARTHLEAK_RELAY=0;
EARTH_LEAKAGE_LED_OFF;
}
//over & under voltage checking
if((voltage > LOW_VOLTAGE )&& (voltage < 670)&&(voltage > 100)) // low voltage -200v
{
RELAY_OFF;
ALL_STATUS_LED_OFF;
UNDER_VOLTAGE_LED_ON;
OVER_VOLTAGE_LED_OFF;
VOLTAGE_RELAY=1;
}
else if ((voltage > HIGH_VOLTAGE) && ( voltage < 840))// high voltage 250 sample value
{
RELAY_OFF;
ALL_STATUS_LED_OFF;
OVER_VOLTAGE_LED_ON;
UNDER_VOLTAGE_LED_OFF;
VOLTAGE_RELAY=1;
}
else
{
if((LOAD_RELAY)||(EARTHLEAK_RELAY)||(FREQUENCY_RELAY))
{
RELAY_OFF;
ALL_STATUS_LED_OFF;
}
else
{
RELAY_ON;
ALL_STATUS_LED_ON;
}
VOLTAGE_RELAY=0;
UNDER_VOLTAGE_LED_OFF;
OVER_VOLTAGE_LED_OFF;
}
// average value should be cleared
//avr_frequency =0;
avr_load =0;
avr_earthvalue=0;
avr_voltage=0;
}
}
//==============================================================================
