// JI3BNB SSTV ENCODER (ROBOT B/W 8S MODE) v1.0 2016.04.08
// ARDUINO UNO + AD9850 DDS
// THIS PROGRAM IS IN THE PUBLIC DOMAIN

#include <TimerOne.h>

#define  CLK   8  //UNO:PORT_B0
#define  FQ    9  //UNO:PORT_B1
#define  DATA  10 //UNO:PORT_B2
#define  RST   11 //UNO:PORT_B3

volatile long  oFrq = 7171000; // ***** set operating Frequency here in Hz *****
volatile byte  sSq;
volatile int   ti;
volatile int   line;

char line00[7] = "CQSSTV";
char line01[7] = "JI3BNB";

const uint8_t font_a[]   = {0x00, 0x18, 0x24, 0x62, 0x62, 0x62, 0x7E, 0x62, 0x62, 0x62, 0x00};
const uint8_t font_b[]   = {0x00, 0x7C, 0x32, 0x32, 0x32, 0x3C, 0x32, 0x32, 0x32, 0x7C, 0x00};
const uint8_t font_c[]   = {0x00, 0x3C, 0x62, 0x62, 0x60, 0x60, 0x60, 0x62, 0x62, 0x3C, 0x00};
const uint8_t font_d[]   = {0x00, 0x7C, 0x32, 0x32, 0x32, 0x32, 0x32, 0x32, 0x32, 0x7C, 0x00};
const uint8_t font_e[]   = {0x00, 0x7E, 0x60, 0x60, 0x60, 0x7C, 0x60, 0x60, 0x60, 0x7E, 0x00};
const uint8_t font_f[]   = {0x00, 0x7E, 0x60, 0x60, 0x60, 0x7C, 0x60, 0x60, 0x60, 0x60, 0x00};
const uint8_t font_g[]   = {0x00, 0x3C, 0x62, 0x62, 0x60, 0x60, 0x66, 0x62, 0x62, 0x3C, 0x00};
const uint8_t font_h[]   = {0x00, 0x62, 0x62, 0x62, 0x62, 0x7E, 0x62, 0x62, 0x62, 0x62, 0x00};
const uint8_t font_i[]   = {0x00, 0x3C, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x3C, 0x00};
const uint8_t font_j[]   = {0x00, 0x1E, 0x0C, 0x0C, 0x0C, 0x0C, 0x4C, 0x4C, 0x4C, 0x38, 0x00};
const uint8_t font_k[]   = {0x00, 0x62, 0x64, 0x68, 0x70, 0x68, 0x64, 0x62, 0x62, 0x62, 0x00};
const uint8_t font_l[]   = {0x00, 0x60, 0x60, 0x60, 0x60, 0x60, 0x60, 0x60, 0x60, 0x7E, 0x00};
const uint8_t font_m[]   = {0x00, 0x42, 0x62, 0x76, 0x6A, 0x62, 0x62, 0x62, 0x62, 0x62, 0x00};
const uint8_t font_n[]   = {0x00, 0x42, 0x62, 0x72, 0x6A, 0x66, 0x62, 0x62, 0x62, 0x62, 0x00};
const uint8_t font_o[]   = {0x00, 0x3C, 0x62, 0x62, 0x62, 0x62, 0x62, 0x62, 0x62, 0x3C, 0x00};
const uint8_t font_p[]   = {0x00, 0x7C, 0x62, 0x62, 0x62, 0x7C, 0x60, 0x60, 0x60, 0x60, 0x00};
const uint8_t font_q[]   = {0x00, 0x3C, 0x62, 0x62, 0x62, 0x62, 0x62, 0x6A, 0x6A, 0x3C, 0x08};
const uint8_t font_r[]   = {0x00, 0x7C, 0x62, 0x62, 0x62, 0x7C, 0x68, 0x64, 0x62, 0x62, 0x00};
const uint8_t font_s[]   = {0x00, 0x3C, 0x62, 0x60, 0x60, 0x3C, 0x06, 0x06, 0x46, 0x3C, 0x00};
const uint8_t font_t[]   = {0x00, 0x7E, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x00};
const uint8_t font_u[]   = {0x00, 0x62, 0x62, 0x62, 0x62, 0x62, 0x62, 0x62, 0x62, 0x3C, 0x00};
const uint8_t font_v[]   = {0x00, 0x62, 0x62, 0x62, 0x62, 0x62, 0x62, 0x22, 0x14, 0x08, 0x00};
const uint8_t font_w[]   = {0x00, 0x62, 0x62, 0x62, 0x62, 0x62, 0x6A, 0x76, 0x62, 0x42, 0x00};
const uint8_t font_x[]   = {0x00, 0x42, 0x62, 0x74, 0x38, 0x1C, 0x2E, 0x46, 0x42, 0x42, 0x00};
const uint8_t font_y[]   = {0x00, 0x42, 0x62, 0x74, 0x38, 0x18, 0x18, 0x18, 0x18, 0x18, 0x00};
const uint8_t font_z[]   = {0x00, 0x7E, 0x06, 0x0E, 0x0C, 0x18, 0x30, 0x70, 0x60, 0x7E, 0x00};
const uint8_t font_0[]   = {0x00, 0x3C, 0x62, 0x62, 0x66, 0x6A, 0x72, 0x62, 0x62, 0x3C, 0x00};
const uint8_t font_1[]   = {0x00, 0x38, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x00};
const uint8_t font_2[]   = {0x00, 0x3C, 0x46, 0x06, 0x06, 0x1C, 0x20, 0x60, 0x60, 0x7E, 0x00};
const uint8_t font_3[]   = {0x00, 0x3C, 0x46, 0x06, 0x06, 0x1C, 0x06, 0x06, 0x46, 0x3C, 0x00};
const uint8_t font_4[]   = {0x00, 0x0C, 0x1C, 0x2C, 0x4C, 0x4C, 0x7E, 0x0C, 0x0C, 0x0C, 0x00};
const uint8_t font_5[]   = {0x00, 0x7E, 0x60, 0x60, 0x60, 0x7C, 0x06, 0x06, 0x46, 0x3C, 0x00};
const uint8_t font_6[]   = {0x00, 0x3C, 0x62, 0x60, 0x60, 0x7C, 0x62, 0x62, 0x62, 0x3C, 0x00};
const uint8_t font_7[]   = {0x00, 0x7E, 0x06, 0x0C, 0x18, 0x30, 0x30, 0x30, 0x30, 0x30, 0x00};
const uint8_t font_8[]   = {0x00, 0x3C, 0x62, 0x62, 0x62, 0x3C, 0x62, 0x62, 0x62, 0x3C, 0x00};
const uint8_t font_9[]   = {0x00, 0x3C, 0x46, 0x46, 0x46, 0x3E, 0x06, 0x06, 0x46, 0x3C, 0x00};
const uint8_t font_slu[] = {0x00, 0x00, 0x02, 0x06, 0x0E, 0x1C, 0x38, 0x70, 0x60, 0x40, 0x00};
const uint8_t font_das[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x7E, 0x7E, 0x00, 0x00, 0x00, 0x00};
const uint8_t font_dot[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x06, 0x00};
const uint8_t font_que[] = {0x00, 0x3C, 0x46, 0x06, 0x06, 0x0C, 0x10, 0x00, 0x30, 0x30, 0x00};
const uint8_t font_eks[] = {0x00, 0x18, 0x18, 0x18, 0x18, 0x10, 0x10, 0x00, 0x18, 0x18, 0x00};
const uint8_t font_col[] = {0x00, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00};
const uint8_t font_spa[] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};

boolean textArea[1232]; //56*22

void shortPulse (char PIN)
{
        digitalWrite(PIN, 1);
        digitalWrite(PIN, 0);
}

void setFreq(double freq)
{
        //--calculate
        int32_t d_Phase = freq * pow(2, 32) / 125000000;
        //--send first 32bit
        for (int i=0; i<32; i++, d_Phase>>=1)
        {
                if(d_Phase & 1 == 1)
                {
                        PORTB |=  _BV(2); //--data
                }
                else
                {
                        PORTB &= ~_BV(2); //--data
                }
                //--short pulse clk
                PORTB |=  _BV(0);
                PORTB &= ~_BV(0);
        }
        //--send rest 8bit
        PORTB &= ~_BV(2); //--data
        for (int i=0; i<8; i++)
        {
                //--short pulse clk
                PORTB |=  _BV(0);
                PORTB &= ~_BV(0);
        }
        //--finish, short pulse fq
        PORTB |=  _BV(1);
        delayMicroseconds(30);
        PORTB &= ~_BV(1);
}

void setup()
{
        Timer1.initialize();
        Timer1.attachInterrupt(timer1_interrupt, 999); //-- SLANT ADJUST --
        
        digitalWrite(6, 1); //INTERNAL PULL UP
        
        pinMode(CLK, OUTPUT);
        pinMode(FQ, OUTPUT);
        pinMode(DATA, OUTPUT);
        pinMode(RST, OUTPUT);
        //--reset
        shortPulse(RST);
        shortPulse(CLK);
        //--change mode
        shortPulse(FQ);
        //--done
        delay(5);
        
        //Serial.begin(9600);
}

void timer1_interrupt(void)
{
        int p;
        
        if(sSq == 3)
        {
                if(line >= 40 && line <= 61)
                {
                        if(ti < 56)
                        {
                                p = 56 * (line - 40) + ti;
                                if(textArea[p])
                                {
                                        setFreq(oFrq - 1500);
                                }
                                else
                                {
                                        setFreq(oFrq - 2300);
                                }
                        }
                        else if(ti == 56)
                        {
                                line++;
                                sSq = 2;
                        }
                }
                else
                {
                        switch(ti)
                        {
                                case 0:
                                        setFreq(oFrq - 1500);
                                        break;
                                case 14:
                                        setFreq(oFrq - 1767);
                                        break;
                                case 28:
                                        setFreq(oFrq - 2033);
                                        break;
                                case 42:
                                        setFreq(oFrq - 2300);
                                        break;
                                case 56:
                                        line++;
                                        if(line == 120)
                                        {
                                                sSq = 0;
                                        }
                                        else
                                        {
                                                sSq = 2;
                                        }
                                        break;
                        }
                }
                ti++;
        }
}

void loop()
{
        int x;
        int y;
        int i;
        int p;

        if(sSq == 0)
        {
                setFreq(2);
                while(sSq == 0)
                {
                        if(digitalRead(6) == 0) // - SEND SW -
                        {
                                sSq = 1;
                        }
                        else
                        {
                                delay(30);
                        }
                }
        }
        if(sSq == 1)
        {
                for(i = 0; i < 1232; i++)
                {
                        textArea[i] = false;
                }
                
                for(i = 0; i < 12; i++)
                {
                        char ch;
                        
                        if(i < 6)
                        {
                                ch = line00[i];
                        }
                        else
                        {
                                ch = line01[i - 6];
                        }
                        
                        for(y = 0; y < 11; y++)
                        {
                                for(x = 0; x < 8; x++)
                                {
                                        if(i < 6)
                                        {
                                                p = 4 + (56 * y) + (8 * i) + x;
                                        }
                                        else
                                        {
                                                p = 4 + (56 * 11) + (56 * y) + (8 * (i - 6)) + x;
                                        }
                                        
                                        uint8_t mask;
                                        
                                             if(x == 0){mask = B10000000;}
                                        else if(x == 1){mask = B01000000;}
                                        else if(x == 2){mask = B00100000;}
                                        else if(x == 3){mask = B00010000;}
                                        else if(x == 4){mask = B00001000;}
                                        else if(x == 5){mask = B00000100;}
                                        else if(x == 6){mask = B00000010;}
                                        else if(x == 7){mask = B00000001;}                                      
                                             
                                        if(ch == 'A')
                                        {
                                                if((font_a[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'B')
                                        {
                                                if((font_b[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'C')
                                        {
                                                if((font_c[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'D')
                                        {
                                                if((font_d[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'E')
                                        {
                                                if((font_e[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'F')
                                        {
                                                if((font_f[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'G')
                                        {
                                                if((font_g[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'H')
                                        {
                                                if((font_h[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'I')
                                        {
                                                if((font_i[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'J')
                                        {
                                                if((font_j[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'K')
                                        {
                                                if((font_k[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'L')
                                        {
                                                if((font_l[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'M')
                                        {
                                                if((font_m[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'N')
                                        {
                                                if((font_n[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'O')
                                        {
                                                if((font_o[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'P')
                                        {
                                                if((font_p[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'Q')
                                        {
                                                if((font_q[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'R')
                                        {
                                                if((font_r[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'S')
                                        {
                                                if((font_s[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'T')
                                        {
                                                if((font_t[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'U')
                                        {
                                                if((font_u[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'V')
                                        {
                                                if((font_v[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'W')
                                        {
                                                if((font_w[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'X')
                                        {
                                                if((font_x[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'Y')
                                        {
                                                if((font_y[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == 'Z')
                                        {
                                                if((font_z[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == '0')
                                        {
                                                if((font_0[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == '1')
                                        {
                                                if((font_1[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == '2')
                                        {
                                                if((font_2[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == '3')
                                        {
                                                if((font_3[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == '4')
                                        {
                                                if((font_4[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == '5')
                                        {
                                                if((font_5[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == '6')
                                        {
                                                if((font_6[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == '7')
                                        {
                                                if((font_7[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == '8')
                                        {
                                                if((font_8[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == '9')
                                        {
                                                if((font_9[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == '/')
                                        {
                                                if((font_slu[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == '-')
                                        {
                                                if((font_das[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == '.')
                                        {
                                                if((font_dot[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == '?')
                                        {
                                                if((font_que[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == '!')
                                        {
                                                if((font_eks[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == ':')
                                        {
                                                if((font_col[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                        else if(ch == ' ')
                                        {
                                                if((font_spa[y] & mask) != 0)
                                                {
                                                        textArea[p] = true;
                                                }
                                        }
                                }
                        }
                }
                
                delay(400);
                
                //--VIS SEQUENCE
                //VIS CODE for ROBOT B/W 8S is B0000010 (DECIMAL 2)
                setFreq(oFrq - 1900);
                delay(300);
                setFreq(oFrq - 1200); //BREAK
                delay(10);
                setFreq(oFrq - 1900);
                delay(300);
                setFreq(oFrq - 1200); //START BIT
                delay(30);
                setFreq(oFrq - 1300); //BIT 0 (LSB FIRST)
                delay(30);
                setFreq(oFrq - 1100); //BIT 1
                delay(30);
                setFreq(oFrq - 1300); //BIT 2, 3, 4, 5, 6
                delay(150);
                setFreq(oFrq - 1100); //EVEN PARITY
                delay(30);
                setFreq(oFrq - 1200); //STOP BIT
                delay(30);
                //--VIS SEQUENCE DONE
                line = 0;
                sSq  = 2;
        }
        if(sSq == 2)
        {
                //--sync
                setFreq(oFrq - 1200);
                delayMicroseconds(9990);
                //--
                ti  = 0;
                sSq = 3;
        }
}