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| #include <16F876A.h>
#include <float.h>
#include <math.h>
//#device *=16 ADC=8 //16bit pointer, 8-bit ADC
#use delay(clock=20000000)
#fuses HS,NOWDT,NOPROTECT,PUT,NOWRT,BROWNOUT,NOLVP
#define TRISA 0b00000000
#define TRISB 0b00000000
#define TRISC 0b00000000
#define Port_Ai 0b00000000 //Initial valua for Port A
#define Port_Bi 0b00000000 //Initial valua for Port B
#define Port_Ci 0b00000000 //Initial valua for Port C
typedef struct {
int1 bit0;
int1 bit1;
int1 bit2;
int1 bit3;
int1 bit4;
int1 bit5;
int1 bit6;
int1 bit7;
} flags;
//Important time variables
float ts, ta, tb, t0, tmag; //time related variable
//Important phase variables
float phase, phaset1; //to identify sector number
float phaset2, thetha, thetha1, thetha2; //to calculate related time variables
float modin; //modulation index
float ZZ; //to convert angles larger than 360 degrees into the scale of 0 to 360 degrees
//Important voltage related variables
float vref, vdc; //to calculate modulation index
//Other variables
int8 i, j, h; //counter
float nsamp, result1; //condition for one complete cycle
int8 n; //sector number
//Variables for Rounding up Process
float result, integral, integral1, XX; // variables for rounding up process
int8 YY, integral2;
float testa1;
//Interrupt Bit
flags sys01;
#define flg_10ms sys01.bit0
//Arrays of Outputs of Each Sector (1 to 6)
int8
outta1[8]={0b00000000,0b00000100,0b00000110,0b00000111,0b00000111,0b00000110,0b00000100,
0b00000000}; //test mar
int8
outta2[8]={0b00000000,0b00000010,0b00000110,0b00000111,0b00000111,0b00000110,0b00000010,
0b00000000}; //test mar
int8
outta3[8]={0b00000000,0b00000010,0b00000011,0b00000111,0b00000111,0b00000011,0b00000010,
0b00000000}; //test mar
int8
outta4[8]={0b00000000,0b00000001,0b00000011,0b00000111,0b00000111,0b00000011,0b00000001,
0b00000000}; //test mar
int8
outta5[8]={0b00000000,0b00000001,0b00000101,0b00000111,0b00000111,0b00000101,0b00000101,
0b00000000}; //test mar
int8
outta6[8]={0b00000000,0b00000100,0b00000101,0b00000111,0b00000111,0b00000101,0b00000100,
0b00000000}; //test mar
int8 timema[8];
//Initialization
void init(){
setup_timer_1(T1_INTERNAL | T1_DIV_BY_8);
// enable_interrupts(INT_RDA);
enable_interrupts(GLOBAL);
enable_interrupts(INT_TIMER1);
}
//Function to transfer output from array to output port
void showout(){
if(n == 1)
{
for(j=0;j<8;j++)
{
output_b(outta1[j]);
delay_ms(timema[j]);
}
}
if(n == 2)
{
for(j=0;j<8;j++)
{
output_b(outta2[j]);
delay_ms(timema[j]);
}
}
if(n == 3)
{
for(j=0;j<8;j++)
{
output_b(outta3[j]);
delay_ms(timema[j]);
}
}
if(n == 4)
{
for(j=0;j<8;j++)
{
output_b(outta4[j]);
delay_ms(timema[j]);
}
}
if(n == 5)
{
for(j=0;j<8;j++)
{
output_b(outta5[j]);
delay_ms(timema[j]);
}
}
if(n == 6)
{
for(j=0;j<8;j++)
{
output_b(outta6[j]);
delay_ms(timema[j]);
}
}
}
//Function to round up ta, tb and t0
void roundup()
{
result=modf(XX,&integral);
YY = integral;
if ((result >=0) && (result <0.5))
{
YY = YY + 0;
}
else{
if ((result >= 0.5) && (result < 1))
{
YY = YY + 1;
}
}
}
//Function to identifying sector number
void idsec()
{
for(i=1;i<=6;i++)
{
phaset1 = i*3.142/3;
phaset1 = phaset1 - phase;
phaset2 = phase - (i - 1)*3.142/3;
if((phaset1 >=0) && (phaset2 >=0))
{
n = i;
}
}
}
//Function to collect and re-insert rounded up numbers for important time variables
void rdjob()
{
XX = ta;
roundup();
ta = YY;
XX = tb;
roundup();
tb = YY;
XX = t0;
roundup();
t0 = YY;
}
//Function to obtain input details
void in_put()
{
vdc = 10;
vref = 10;
//fundamental frequency of 10 Hz (100 samples)
phase = 2*3.142*h*0.01;
}
// Calculation of time ta, tb, ts and t0
void tcal()
{
ts = 1000/100;
thetha = phase;
thetha1 = (n*3.142/3) - thetha;
thetha2 = thetha - (n - 1)*3.142/3;
tmag = (sqrt(3))*(modin)*ts/4; //moin=vref1/vdc1
ta = (tmag)*(sin(thetha1)); //test time
tb = (tmag)*(sin(thetha2)); //test time
t0 = ts - ta - tb;
t0 = t0/2;
rdjob();
//Putting times into timema array
timema[0]=t0;
timema[3]=t0;
timema[4]=t0;
timema[7]=t0;
timema[1]=ta;
timema[6]=ta;
timema[2]=tb;
timema[5]=tb;
}
//Main function
void main()
{
Mainloop:
nsamp = 100;
result1=modf(nsamp,&integral1);
integral2=integral1+1;
h=1;
do
{
in_put();
idsec();
tcal();
h++;
} while (h < integral2);
goto Mainloop;
} |
