Total Pageviews

Thursday, April 2, 2015

Touch screen DDS with AD9850 and Arduino

   With a touch screen display like this:
who work fine with SWTFT library from Smoke and WiresI write a sketch for a virtual keyboard... after some tests, I decided to use the DDS module with AD9850 (see article Signal generator with AD9850 and Arduino) together with this display and made a "touch screen DDS".
   Display is made as a shield for Arduino Uno/Mega boards and use a lot of outputs...
 I designed a intermediate shield for disconnect the microSD and connect the AD9850 module:
   Real, the and shield and modules:
   My sketch use library for control the display from Smoke and Wires and use info for control the AD9850 from http://webshed.org/wiki/AD9850_Arduino:
// Code for TFT shield display provided by Smoke And Wires
// http://www.smokeandwires.co.nz
// This code has been taken from the Adafruit TFT Library and modified
//  by us for use with our TFT Shields / Modules
// For original code / licensing please refer to
// https://github.com/adafruit/TFTLCD-Library

// adapted sketch by niq_ro from http://arduinotehniq.blogspot.com/
// http://nicuflorica.blogspot.ro/
// http://www.tehnic.go.ro
// http://www.niqro.3x.ro
// original virtual keyboard with DDS with AD8959 by niq_ro
// ver. 1m4a: 30.03.2015, Craiova - Romania

#include <Adafruit_GFX.h>    // Core graphics library
#include "SWTFT.h" // Hardware-specific library

// The control pins for the LCD can be assigned to any digital or
// analog pins...but we'll use the analog pins as this allows us to
// double up the pins with the touch screen (see the TFT paint example).
// #define LCD_CS A3 // Chip Select goes to Analog 3
// #define LCD_CD A2 // Command/Data goes to Analog 2
// #define LCD_WR A1 // LCD Write goes to Analog 1
// #define LCD_RD A0 // LCD Read goes to Analog 0

// #define LCD_RESET A4 // Can alternately just connect to Arduino's reset pin

// When using the BREAKOUT BOARD only, use these 8 data lines to the LCD:
// For the Arduino Uno, Duemilanove, Diecimila, etc.:
//   D0 connects to digital pin 8  (Notice these are
//   D1 connects to digital pin 9   NOT in order!)
//   D2 connects to digital pin 2
//   D3 connects to digital pin 3
//   D4 connects to digital pin 4
//   D5 connects to digital pin 5
//   D6 connects to digital pin 6
//   D7 connects to digital pin 7
// For the Arduino Mega, use digital pins 22 through 29
// (on the 2-row header at the end of the board).

#include <TouchScreen.h>


#define YP A1  // must be an analog pin, use "An" notation!
#define XM A2  // must be an analog pin, use "An" notation!
#define YM 7   // can be a digital pin
#define XP 6   // can be a digital pin

#define TS_MINX 150
#define TS_MINY 120
#define TS_MAXX 920
#define TS_MAXY 940

// For better pressure precision, we need to know the resistance
// between X+ and X- Use any multimeter to read it
// For the one we're using, its 300 ohms across the X plate
TouchScreen ts = TouchScreen(XP, YP, XM, YM, 300);

// Assign human-readable names to some common 16-bit color values:
#define BLACK   0x0000
#define BLUE    0x001F
#define RED     0xF800
#define GREEN   0x07E0
#define CYAN    0x07FF
#define MAGENTA 0xF81F
#define YELLOW  0xFFE0
#define WHITE   0xFFFF
#define ROZ     0xFBE0
#define GRI     0xBDF7
// http://stackoverflow.com/questions/13720937/c-defined-16bit-high-color
// http://wiibrew.org/wiki/U16_colors

SWTFT tft;

#define BOXSIZE 80
#define BOXSIZE2 60
#define PENRADIUS 3

int ics; 
int numar, ics0, igr0, pas; 

#include <EEPROM.h>
long n1, n2, n3, n4, n5, n6, n7, n8; // number for frequency;
long frecv; // value for frecvency;
byte cifru; 

//Setup some items
//#define W_CLK 13   // Pin 13 - connect to AD9850 module word load clock pin (CLK)
#define CLOCK 13
//#define FQ_UD 12   // Pin 12 - connect to freq update pin (FQ)
#define LOAD 12
#define DATA 11   // Pin 11 - connect to serial data load pin (DATA)
#define RESET 10  // Pin 10 - connect to reset pin (RST) 
//#define pulseHigh(pin) {digitalWrite(pin, HIGH); digitalWrite(pin, LOW); }
#define DDS_CLOCK 125000000 // http://webshed.org/wiki/AD9850_Arduino
//#define DDS_CLOCK 125000000

void setup(void) {

pinMode (DATA,  OUTPUT); 
pinMode (CLOCK, OUTPUT); 
pinMode (LOAD,  OUTPUT); 
pinMode (RESET, OUTPUT); 
  
AD9850_init();
AD9850_reset();
//SetFrequency(15000);
zaibar();
SetFrequency(frecv);
  
  Serial.begin(9600);
  Serial.print(F("DDS with AD9850 "));
  Serial.println("made by niq_ro");
  
  tft.reset();
  
  uint16_t identifier = tft.readID();

  Serial.print(F("LCD driver chip: "));
  Serial.println(identifier, HEX);
 
  tft.begin(identifier);

  tft.fillScreen(BLACK);
  tft.fillRect(0, 0, 320, 240, BLACK);
//  tft.setRotation(0);
//  tft.setCursor(5, 100);
  tft.setTextColor(RED);  tft.setTextSize(2);
//  tft.println("Acces control");
  tft.setCursor(30, 120);
  tft.println("DDS with AD9850");
  tft.setCursor(20, 150);
  tft.setTextColor(YELLOW);
  tft.println("on touch display");
  tft.setCursor(70, 180);
  tft.setTextColor(BLUE);
  tft.println("by niq_ro");
  tft.setCursor(75, 210);
  tft.setTextColor(ROZ);
  tft.println("ver. 1.4a");
  

delay(2000);
tft.fillRect(0, 0, 320, 240, BLACK);

numar = 0;
ics0 = 10;
igr0 = 280;
pas = 18;
frecv = 0;
  
//tft.setRotation(0);
 stergere ();

 cifre ();
 caractere();

}

#define MINPRESSURE 10
#define MAXPRESSURE 1000


void loop()
{
    
  // Recently Point was renamed TSPoint in the TouchScreen library
  // If you are using an older version of the library, use the
  // commented definition instead.
  // Point p = ts.getPoint();
  TSPoint p = ts.getPoint();

  // if sharing pins, you'll need to fix the directions of the touchscreen pins
  //pinMode(XP, OUTPUT);
  pinMode(XM, OUTPUT);
  pinMode(YP, OUTPUT);
  //pinMode(YM, OUTPUT);

  // we have some minimum pressure we consider 'valid'
  // pressure of 0 means no pressing!

  if (p.z > MINPRESSURE && p.z < MAXPRESSURE) {
  //   tft.setTextSize(4);
     // scale from 0->1023 to tft.width
    p.x = tft.width()-(map(p.x, TS_MINX, TS_MAXX, tft.width(), 0));
    p.y = tft.height()-(map(p.y, TS_MINY, TS_MAXY, tft.height(), 0));
 
    if (p.y < BOXSIZE2) {   // fist line (0, 1 & 2)
         if (p.x < BOXSIZE) { 
         tft.fillRect(0, 0, BOXSIZE, BOXSIZE2, GRI); // one       
         tft.setTextColor(BLACK);
         tft.setCursor(30, 20);
         tft.println("1");
 //        caracter(1);
int ics1 = ics0+pas*numar;
caracters(1,ics1,igr0);
cifru = 1;
         delay (200);
         tft.fillRect(0, 0, BOXSIZE, BOXSIZE2, RED); // one       
         tft.setTextColor(WHITE);
         tft.setCursor(30, 20);
         tft.println("1");

       } else if (p.x < BOXSIZE*2) {
         tft.fillRect(BOXSIZE, 0, BOXSIZE, BOXSIZE2, GRI);  // two
         tft.setTextColor(BLACK);
         tft.setCursor(110, 20);
         tft.println("2");
//         caracter(2);
int ics1 = ics0+pas*numar;
caracters(2,ics1,igr0);
cifru = 2;
         delay (200);
         tft.fillRect(BOXSIZE, 0, BOXSIZE, BOXSIZE2, YELLOW);  // two
         tft.setTextColor(BLACK);
         tft.setCursor(110, 20);
         tft.println("2");
         
        } else if (p.x < BOXSIZE*3) {
         tft.fillRect(BOXSIZE*2, 0, BOXSIZE, BOXSIZE2, GRI); // three
         tft.setTextColor(BLACK);
         tft.setCursor(190, 20);
         tft.println("3");
//         caracter(3);
int ics1 = ics0+pas*numar;
caracters(3,ics1,igr0);
cifru = 3;
         delay (200);
         tft.fillRect(BOXSIZE*2, 0, BOXSIZE, BOXSIZE2, BLUE); // three
         tft.setTextColor(WHITE);
         tft.setCursor(190, 20);
         tft.println("3");
       }
   //      numar = numar + 1;
    }
    
  if ((p.y < BOXSIZE2*2) && (p.y > BOXSIZE2)) {   // second line (4, 5 & 6)
         if (p.x < BOXSIZE) { 
         tft.fillRect(0, BOXSIZE2, BOXSIZE, BOXSIZE2, GRI); // four       
         tft.setTextColor(BLACK);
         tft.setCursor(30, 80);
         tft.println("4");
int ics1 = ics0+pas*numar;
caracters(4,ics1,igr0);
cifru = 4;
//         caracter(4);
         delay (200);
         tft.fillRect(0, BOXSIZE2, BOXSIZE, BOXSIZE2, CYAN); // four 
         tft.setTextColor(BLACK);
         tft.setCursor(30, 80);
         tft.println("4");

       } else if (p.x < BOXSIZE*2) {
         tft.fillRect(BOXSIZE, BOXSIZE2, BOXSIZE, BOXSIZE2, GRI);  // five
         tft.setTextColor(BLACK);
         tft.setCursor(110, 80);
         tft.println("5");
int ics1 = ics0+pas*numar;
caracters(5,ics1,igr0);
cifru = 5;
//         caracter(5);
         delay (200);
         tft.fillRect(BOXSIZE, BOXSIZE2, BOXSIZE, BOXSIZE2, GREEN);  // five
         tft.setTextColor(BLACK);
         tft.setCursor(110, 80);
         tft.println("5");
         
        } else if (p.x < BOXSIZE*3) {
         tft.fillRect(BOXSIZE*2, BOXSIZE2, BOXSIZE, BOXSIZE2, GRI); // six
         tft.setTextColor(BLACK);
         tft.setCursor(190, 80);
         tft.println("6");
int ics1 = ics0+pas*numar;
caracters(6,ics1,igr0);
cifru = 6;
//         caracter(6);
         delay (200);
         tft.fillRect(BOXSIZE*2, BOXSIZE2, BOXSIZE, BOXSIZE2, MAGENTA); // six
         tft.setTextColor(WHITE);
         tft.setCursor(190, 80);
         tft.println("6");
       }
    //     numar = numar + 1;
  }

if ((p.y < BOXSIZE2*3) && (p.y > BOXSIZE2*2)) {   // second line (7, 8 & 9)
         if (p.x < BOXSIZE) { 
         tft.fillRect(0, BOXSIZE2*2, BOXSIZE, BOXSIZE2, GRI); // four       
         tft.setTextColor(BLACK);
         tft.setCursor(30, 140);
         tft.println("7");
int ics1 = ics0+pas*numar;
caracters(7,ics1,igr0);
cifru = 7;
//         caracter(7);
         delay (200);
         tft.fillRect(0, BOXSIZE2*2, BOXSIZE, BOXSIZE2, RED); // four 
         tft.setTextColor(WHITE);
         tft.setCursor(30, 140);
         tft.println("7");

       } else if (p.x < BOXSIZE*2) {
         tft.fillRect(BOXSIZE, BOXSIZE2*2, BOXSIZE, BOXSIZE2, GRI);  // five
         tft.setTextColor(BLACK);
         tft.setCursor(110, 140);
         tft.println("8");
int ics1 = ics0+pas*numar;
caracters(8,ics1,igr0);
cifru = 8;
//         caracter(8);
         delay (200);
         tft.fillRect(BOXSIZE, BOXSIZE2*2, BOXSIZE, BOXSIZE2, YELLOW);  // five
         tft.setTextColor(BLACK);
         tft.setCursor(110, 140);
         tft.println("8");
         
        } else if (p.x < BOXSIZE*3) {
         tft.fillRect(BOXSIZE*2, BOXSIZE2*2, BOXSIZE, BOXSIZE2, GRI); // six
         tft.setTextColor(BLACK);
         tft.setCursor(190, 140);
         tft.println("9");
//         caracter(9);
int ics1 = ics0+pas*numar;
caracters(9,ics1,igr0);
cifru = 9;
         delay (200);
         tft.fillRect(BOXSIZE*2, BOXSIZE2*2, BOXSIZE, BOXSIZE2, BLUE); // six
         tft.setTextColor(WHITE);
         tft.setCursor(190, 140);
         tft.println("9");
       }
  //       numar = numar + 1;
 }

if ((p.y < BOXSIZE2*4) && (p.y > BOXSIZE2*3)) {   // second line (*, 0 & #)
/*
       if (p.x < BOXSIZE) { 
         tft.fillRect(0, BOXSIZE2*3, BOXSIZE, BOXSIZE2, GRI); // four       
         tft.setTextColor(BLACK);
         tft.setCursor(30, 200);
         tft.println("*");
int ics1 = ics0+pas*numar;
caracters(10,ics1,igr0);
//         caracter(10);
         delay (200);
         tft.fillRect(0, BOXSIZE2*3, BOXSIZE, BOXSIZE2, CYAN); // four 
         tft.setTextColor(BLACK);
         tft.setCursor(30, 200);
         tft.println("*");

       } else
   */   
       if ((p.x > BOXSIZE) && (p.x < BOXSIZE*2))  {
         tft.fillRect(BOXSIZE, BOXSIZE2*3, BOXSIZE, BOXSIZE2, GRI);  // five
         tft.setTextColor(BLACK);
         tft.setCursor(110, 200);
         tft.println("0");
//         caracter(0);
int ics1 = ics0+pas*numar;
caracters(0,ics1,igr0);
cifru = 0;
         delay (200);
         tft.fillRect(BOXSIZE, BOXSIZE2*3, BOXSIZE, BOXSIZE2, GREEN);  // five
         tft.setTextColor(BLACK);
         tft.setCursor(110, 200);
         tft.println("0");
         
        }
 /*
        else if (p.x < BOXSIZE*3) {
         tft.fillRect(BOXSIZE*2, BOXSIZE2*3, BOXSIZE, BOXSIZE2, GRI); // six
         tft.setTextColor(BLACK);
         tft.setCursor(190, 200);
         tft.println("#");
int ics1 = ics0+pas*numar;
caracters(11,ics1,igr0);
//         caracter(11);
         delay (200);
         tft.fillRect(BOXSIZE*2, BOXSIZE2*3, BOXSIZE, BOXSIZE2, MAGENTA); // six
         tft.setTextColor(WHITE);
         tft.setCursor(190, 200);
         tft.println("#");
       }
*/       
       
// numar = numar + 1;
     }
//caractere();

  numar = numar + 1;
memorie(cifru,numar);
Serial.print(cifru);

  if (numar == 2) numar = numar +1;
  if (numar == 6) numar = numar +1;

  if (numar == 10) {
    tft.setTextColor(YELLOW);
     tft.setTextSize(3);
         tft.setCursor(200, 250);
         tft.println("ok");

 Serial.print(" --> "); 
// read eeprom memory and calculate the stored number (freqvency)
zaibar(); 

 Serial.print(frecv);
 Serial.println("Hz");
 Serial.println("---------");
  Serial.print(frecv);
/*
  Serial.println(frecv);
          Serial.println("---------");
          for (int j=11; j<19; j++)
          {
           Serial.print(EEPROM.read(j));
          }
 */
   delay (3000);
 tft.fillRect(0, 310 , 239, 5, BLACK);   // for testing   
 tft.fillRect(199, 249 , pas*2+2, 30, BLACK);   // for testing   
//   caractere();
   numar = 0;
        
  }
  }

  
}  // end main loop


void cifre ()
{
// number for "buttons"
 tft.setTextSize(4);
 tft.setTextColor(WHITE);
 tft.setCursor(30, 20);
 tft.println("1");
 tft.setTextColor(BLACK);
 tft.setCursor(110, 20);
 tft.println("2");
 tft.setTextColor(WHITE);
 tft.setCursor(190, 20);
 tft.println("3");
 tft.setTextColor(BLACK);
 tft.setCursor(30, 80);
 tft.println("4");
 tft.setTextColor(BLACK);
 tft.setCursor(110, 80);
 tft.println("5");
 tft.setTextColor(WHITE);
 tft.setCursor(190, 80);
 tft.println("6");
 tft.setTextColor(WHITE);
 tft.setCursor(30, 140);
 tft.println("7");
 tft.setTextColor(BLACK);
 tft.setCursor(110, 140);
 tft.println("8");
 tft.setTextColor(WHITE);
 tft.setCursor(190, 140);
 tft.println("9");
// tft.setTextColor(BLACK);
// tft.setCursor(30, 200);
// tft.println("*");
 tft.setTextColor(BLACK);
 tft.setCursor(110, 200);
 tft.println("0");
// tft.setTextColor(WHITE);
// tft.setCursor(190, 200);
// tft.println("#");
}

void stergere ()
{
//      Serial.println("erase");
// firs line
  tft.fillRect(0, 0, BOXSIZE, BOXSIZE2, RED); // one
  tft.fillRect(BOXSIZE, 0, BOXSIZE, BOXSIZE2, YELLOW);  // two
  tft.fillRect(BOXSIZE*2, 0, BOXSIZE, BOXSIZE2, BLUE); // three
// second line
  tft.fillRect(0, BOXSIZE2 , BOXSIZE, BOXSIZE2, CYAN);  // four
  tft.fillRect(BOXSIZE, BOXSIZE2, BOXSIZE, BOXSIZE2, GREEN);  // five
  tft.fillRect(BOXSIZE*2, BOXSIZE2, BOXSIZE, BOXSIZE2, MAGENTA);  // six
// 3rd line
  tft.fillRect(0, BOXSIZE2*2 , BOXSIZE, BOXSIZE2, RED);  // seven
  tft.fillRect(BOXSIZE, BOXSIZE2*2, BOXSIZE, BOXSIZE2, YELLOW);  // eight
  tft.fillRect(BOXSIZE*2, BOXSIZE2*2, BOXSIZE, BOXSIZE2, BLUE);  // nein
// 4th line
//  tft.fillRect(0, BOXSIZE2*3 , BOXSIZE, BOXSIZE2, CYAN);  // *
  tft.fillRect(BOXSIZE, BOXSIZE2*3, BOXSIZE, BOXSIZE2, GREEN);  // zero
//  tft.fillRect(BOXSIZE*2, BOXSIZE2*3, BOXSIZE, BOXSIZE2, MAGENTA);  // #

  cifre ();  
    }

void caracter (int numar)
{
 tft.setTextSize(4);
 tft.setTextColor(WHITE);
 tft.setCursor(110, 280);
 tft.fillRect(0, 260 , 240, 59, BLACK);  // *
if (numar == 0) tft.println("0");
if (numar == 1) tft.println("1");
if (numar == 2) tft.println("2");
if (numar == 3) tft.println("3");
if (numar == 4) tft.println("4");
if (numar == 5) tft.println("5");
if (numar == 6) tft.println("6");
if (numar == 7) tft.println("7");
if (numar == 8) tft.println("8");
if (numar == 9) tft.println("9");
//if (numar == 10) tft.println("*");
//if (numar == 11) tft.println("#");
}

void caractere()
{
 tft.setTextSize(2);
tft.fillRect(0, 241 , 240, 79, BLACK);  // *
 tft.setTextColor(WHITE);
 tft.setCursor(10, 258);
 tft.println("DDS with AD9850");
 tft.setTextSize(3);
 tft.setCursor(10, 280);
// tft.println("??.???.???Hz");
citiremem();
// tft.println(EEPROM.read(11)); 
}

void caracters (int numar, int ics, int igr)
{
 tft.setTextSize(3);
 tft.setTextColor(WHITE);
//tft.drawLine(x1, y1, x2, y2, color); // line model
 tft.drawLine(ics, igr+32, ics+pas, igr+32, BLUE);


 tft.setCursor(ics, igr);
 tft.fillRect(ics, igr-2 , pas, 30, YELLOW);   // for testing
 delay(100);
 tft.fillRect(ics, igr-2 , pas, 30, BLACK);  

if (numar == 0) tft.println("0");
if (numar == 1) tft.println("1");
if (numar == 2) tft.println("2");
if (numar == 3) tft.println("3");
if (numar == 4) tft.println("4");
if (numar == 5) tft.println("5");
if (numar == 6) tft.println("6");
if (numar == 7) tft.println("7");
if (numar == 8) tft.println("8");
if (numar == 9) tft.println("9");
//if (numar == 10) tft.println("*");
//if (numar == 11) tft.println("#");
tft.setTextSize(4);
}


void memorie (byte cifra, int pozitie)
{
  if (pozitie == 1) {
    EEPROM.write(11,cifra); // cifra zeci de MHz
  //  Serial.print(EEPROM.read(11));
  }
  if (pozitie == 2) {
    EEPROM.write(12,cifra); // cifra MHZ
 //   Serial.print(EEPROM.read(12));
  }  
  if (pozitie == 4) {
    EEPROM.write(13,cifra); // cifra sute de kHz
//   Serial.print(EEPROM.read(13));
  }
  if (pozitie == 5) {
    EEPROM.write(14,cifra); // cifra zeci de kHz
 //   Serial.print(EEPROM.read(14));
  }
  if (pozitie == 6) {
    EEPROM.write(15,cifra); // cifra kHz
 //   Serial.print(EEPROM.read(15));
  }   
  if (pozitie == 8) {
    EEPROM.write(16,cifra); // cifra sute de Hz
  //  Serial.print(EEPROM.read(16));
  }
  if (pozitie == 9) {
    EEPROM.write(17,cifra); // cifra zeci de Hz
 //   Serial.print(EEPROM.read(17));
  }
  if (pozitie == 10) {
    EEPROM.write(18,cifra); // cifra Hz
 //   Serial.print(EEPROM.read(18));
  }
}

void citiremem ()
{
//tft.setTextSize(3);
// tft.setCursor(10, 280);
 for (int ji=11; ji<19; ji++)
{
  int nr = EEPROM.read(ji);

if (nr == 0) tft.print("0");
if (nr == 1) tft.print("1");
if (nr == 2) tft.print("2");
if (nr == 3) tft.print("3");
if (nr == 4) tft.print("4");
if (nr == 5) tft.print("5");
if (nr == 6) tft.print("6");
if (nr == 7) tft.print("7");
if (nr == 8) tft.print("8");
if (nr == 9) tft.print("9");

if (ji==12) tft.print(".");
if (ji==15) tft.print(".");
}
tft.println("Hz");
}


void SetFrequency(unsigned long frequency)
{
  unsigned long tuning_word = (frequency * pow(2, 32)) / DDS_CLOCK;
  digitalWrite (LOAD, LOW); 

  shiftOut(DATA, CLOCK, LSBFIRST, tuning_word);
  shiftOut(DATA, CLOCK, LSBFIRST, tuning_word >> 8);
  shiftOut(DATA, CLOCK, LSBFIRST, tuning_word >> 16);
  shiftOut(DATA, CLOCK, LSBFIRST, tuning_word >> 24);
  shiftOut(DATA, CLOCK, LSBFIRST, 0x0);
  digitalWrite (LOAD, HIGH); 
}

void AD9850_init()
{

  digitalWrite(RESET, LOW);
  digitalWrite(CLOCK, LOW);
  digitalWrite(LOAD, LOW);
  digitalWrite(DATA, LOW);
}

void AD9850_reset()
{
  //reset sequence is:
  // CLOCK & LOAD = LOW
  //  Pulse RESET high for a few uS (use 5 uS here)
  //  Pulse CLOCK high for a few uS (use 5 uS here)
  //  Set DATA to ZERO and pulse LOAD for a few uS (use 5 uS here)

  // data sheet diagrams show only RESET and CLOCK being used to reset the device, but I see no output unless I also
  // toggle the LOAD line here.

  digitalWrite(CLOCK, LOW);
  digitalWrite(LOAD, LOW);

  digitalWrite(RESET, LOW);
  delay(5);
  digitalWrite(RESET, HIGH);  //pulse RESET
  delay(5);
  digitalWrite(RESET, LOW);
  delay(5);

  digitalWrite(CLOCK, LOW);
  delay(5);
  digitalWrite(CLOCK, HIGH);  //pulse CLOCK
  delay(5);
  digitalWrite(CLOCK, LOW);
  delay(5);
  digitalWrite(DATA, LOW);    //make sure DATA pin is LOW

  digitalWrite(LOAD, LOW);
  delay(5);
  digitalWrite(LOAD, HIGH);  //pulse LOAD
  delay(5);
  digitalWrite(LOAD, LOW);
  // Chip is RESET now
}


void zaibar()
{
 n1 = EEPROM.read(11); //Serial.print(n1);
 n2 = EEPROM.read(12); //Serial.print(n2);
 n3 = EEPROM.read(13); //Serial.print(n3);
 n4 = EEPROM.read(14); //Serial.print(n4);
 n5 = EEPROM.read(15); //Serial.print(n5);
 n6 = EEPROM.read(16); //Serial.print(n6);
 n7 = EEPROM.read(17); //Serial.print(n7);
 n8 = EEPROM.read(18); //Serial.print(n8);
 frecv = n1*10000000 + n2*1000000+n3*100000+n4*10000+n5*1000+n6*100+n7*10+n8;
}  
   For measure the freqvency I made a simple freqvencymeter with Arduino, using info from interface.khm.de:
   I made a movie named Touch screen DDS with AD9850

Saturday, March 28, 2015

Signal generator with AD9850 and Arduino

   With AD9850 module we can made a signal generator controlled by Arduino with a rotary encoder and last frecvency stored in EEPROM.
   Base project is from http://www.ad7c.com/projects/ad9850-dds-vfo/
   I use a simplified schematic (without MF Frequency Shift):
   After I upload sketch and put oscilloscope I can see the square signal:
and sinus:

   My resuslts are:
   I use this sketch for DDS with AD9850, Arduino and rotary encoder:
/*
Main code by Richard Visokey AD7C - http://www.ad7c.com
Revision 2.0 - November 6th, 2013
adapted sketch 1.2 - january 1st, 2015 - by Nicu Florica - http://www.tehnic.go.ro
http://nicuflorica.blogspot.ro/
http://arduinotehniq.blogsopt.com/
*/

// Include the library code
#include <LiquidCrystal.h>
#include <rotary.h>
#include <EEPROM.h>

//Setup some items
#define W_CLK 8   // Pin 8 - connect to AD9850 module word load clock pin (CLK)
#define FQ_UD 9   // Pin 9 - connect to freq update pin (FQ)
#define DATA 10   // Pin 10 - connect to serial data load pin (DATA)
#define RESET 11  // Pin 11 - connect to reset pin (RST) 
#define pulseHigh(pin) {digitalWrite(pin, HIGH); digitalWrite(pin, LOW); }
Rotary r = Rotary(2,3); // sets the pins the rotary encoder uses.  Must be interrupt pins.
LiquidCrystal lcd(13, 12, 7, 6, 5, 4); // I used an odd pin combination because I need pin 2 and 3 for the interrupts.
int_fast32_t rx=7200000; // Starting frequency of VFO
int_fast32_t rx2=1; // variable to hold the updated frequency
int_fast32_t increment = 1; // starting VFO update increment in HZ.
int buttonstate = 0;
String hertz = "1 Hz";
int  hertzPosition = 6;
byte ones,tens,hundreds,thousands,tenthousands,hundredthousands,millions ;  //Placeholders
String freq; // string to hold the frequency
int_fast32_t timepassed = millis(); // int to hold the arduino miilis since startup
int memstatus = 1;  // value to notify if memory is current or old. 0=old, 1=current.

int ForceFreq = 0;  // Change this to 0 after you upload and run a working sketch to activate the EEPROM memory.  YOU MUST PUT THIS BACK TO 0 AND UPLOAD THE SKETCH AGAIN AFTER STARTING FREQUENCY IS SET!

void setup() {
  pinMode(A0,INPUT); // Connect to a button that goes to GND on push
  digitalWrite(A0,HIGH);
  lcd.begin(16, 2);
  PCICR |= (1 << PCIE2);
  PCMSK2 |= (1 << PCINT18) | (1 << PCINT19);
  sei();
  pinMode(FQ_UD, OUTPUT);
  pinMode(W_CLK, OUTPUT);
  pinMode(DATA, OUTPUT);
  pinMode(RESET, OUTPUT); 
  pulseHigh(RESET);
  pulseHigh(W_CLK);
  pulseHigh(FQ_UD);  // this pulse enables serial mode on the AD9850 - Datasheet page 12.
  lcd.setCursor(hertzPosition,1);    
  lcd.print(hertz);
   // Load the stored frequency  
  if (ForceFreq == 0) {
    freq = String(EEPROM.read(0))+String(EEPROM.read(1))+String(EEPROM.read(2))+String(EEPROM.read(3))+String(EEPROM.read(4))+String(EEPROM.read(5))+String(EEPROM.read(6));
    rx = freq.toInt();  
  }
}


void loop() {
  if (rx != rx2){    
        showFreq();
        sendFrequency(rx);
        rx2 = rx;
      }
      
  buttonstate = digitalRead(A0);
  if(buttonstate == LOW) {
        setincrement();        
    };

  // Write the frequency to memory if not stored and 2 seconds have passed since the last frequency change.
    if(memstatus == 0){   
      if(timepassed+2000 < millis()){
        storeMEM();
        }
      }   
}


ISR(PCINT2_vect) {
  unsigned char result = r.process();
  if (result) {    
    if (result == DIR_CW){rx=rx+increment;}
    else {rx=rx-increment;};       
      if (rx >=30000000){rx=rx2;}; // UPPER VFO LIMIT
      if (rx <=1){rx=rx2;}; // LOWER VFO LIMIT
  }
}



// frequency calc from datasheet page 8 = <sys clock> * <frequency tuning word>/2^32
void sendFrequency(double frequency) {  
  int32_t freq = frequency * 4294967295/125000000;  // note 125 MHz clock on 9850.  You can make 'slight' tuning variations here by adjusting the clock frequency.
  for (int b=0; b<4; b++, freq>>=8) {
    tfr_byte(freq & 0xFF);
  }
  tfr_byte(0x000);   // Final control byte, all 0 for 9850 chip
  pulseHigh(FQ_UD);  // Done!  Should see output
}
// transfers a byte, a bit at a time, LSB first to the 9850 via serial DATA line
void tfr_byte(byte data)
{
  for (int i=0; i<8; i++, data>>=1) {
    digitalWrite(DATA, data & 0x01);
    pulseHigh(W_CLK);   //after each bit sent, CLK is pulsed high
  }
}

void setincrement(){
  if(increment == 1){increment = 10; hertz = "10 Hz"; hertzPosition=5;}
  else if(increment == 10){increment = 50; hertz = "50 Hz"; hertzPosition=5;}
  else if (increment == 50){increment = 100;  hertz = "100 Hz"; hertzPosition=4;}
  else if (increment == 100){increment = 500; hertz="500 Hz"; hertzPosition=4;}
  else if (increment == 500){increment = 1000; hertz="1 kHz"; hertzPosition=6;}
  else if (increment == 1000){increment = 2500; hertz="2.5 kHz"; hertzPosition=4;}
  else if (increment == 2500){increment = 5000; hertz="5 kHz"; hertzPosition=6;}
  else if (increment == 5000){increment = 10000; hertz="10 kHz"; hertzPosition=5;}
  else if (increment == 10000){increment = 100000; hertz="100 kHz"; hertzPosition=4;}
  else if (increment == 100000){increment = 1000000; hertz="1 MHz"; hertzPosition=6;}  
  else{increment = 1; hertz = "1 Hz"; hertzPosition=6;};  
   lcd.setCursor(0,1);
   lcd.print("                ");
   lcd.setCursor(hertzPosition,1); 
   lcd.print(hertz); 
   delay(250); // Adjust this delay to speed up/slow down the button menu scroll speed.
};

void showFreq(){
    millions = int(rx/1000000);
    hundredthousands = ((rx/100000)%10);
    tenthousands = ((rx/10000)%10);
    thousands = ((rx/1000)%10);
    hundreds = ((rx/100)%10);
    tens = ((rx/10)%10);
    ones = ((rx/1)%10);
    lcd.setCursor(0,0);
    lcd.print("                ");
   if (millions > 9)
   {
       lcd.setCursor(1,0);
      }
   else 
   {
        lcd.setCursor(2,0); 
   }
    lcd.print(millions);
    lcd.print(",");
    lcd.print(hundredthousands);
    lcd.print(tenthousands);
    lcd.print(thousands);
    lcd.print(".");
    lcd.print(hundreds);
    lcd.print(tens);
    lcd.print(ones);
    lcd.print(" MHz  ");
    timepassed = millis();
    memstatus = 0; // Trigger memory write
};

void storeMEM(){
  //Write each frequency section to a EPROM slot.  Yes, it's cheating but it works!
   EEPROM.write(0,millions);
   EEPROM.write(1,hundredthousands);
   EEPROM.write(2,tenthousands);
   EEPROM.write(3,thousands);
   EEPROM.write(4,hundreds);       
   EEPROM.write(5,tens);
   EEPROM.write(6,ones);   
   memstatus = 1;  // Let program know memory has been written
   lcd.setCursor(1,15);
   lcd.print("*");
   delay(500);
   lcd.setCursor(1,15);
   lcd.print(" ");
 
};
   Now, I have in tests a new version with a TFT display with touch using a homemade shield from Arduino:
   I made a movie with a preliminary test for DDS with AD9850 and TFT display with touch...

Friday, November 14, 2014

2.4" touch TFT LCD shield

   I purchased from ebay  a cheap 2.4" touch TFT LCD shield for Arduino Uno:
   For control the display I try library recomanded by buyer but not work at me. I search on net and I found article named A 2.4″ TFT TOUCHSCREEN SHIELD FOR ARDUINO
   Smoke and Wires change TFT libray from Adafruit for works with this display. The new library is SWTFT. You must have alse Touch Screen library and Adafruit GFX library.
   First, I tryed examples from SWTFT library and I made a movie:
and few pics:
   For understund the example from SWTFT library, I change the sketch and my results are:


   Finally, I try this:

and my sketch is:
// Original code provided by Smoke And Wires
// http://www.smokeandwires.co.nz
// This code has been taken from the Adafruit TFT Library and modified
//  by us for use with our TFT Shields / Modules
// For original code / licensing please refer to
// https://github.com/adafruit/TFTLCD-Library

// adapted sketch by niq_ro from http://arduinotehniq.blogspot.com/
// ver. 1m5 - 13.11.2014, Craiova - Romania

#include <Adafruit_GFX.h>    // Core graphics library
#include "SWTFT.h" // Hardware-specific library

// The control pins for the LCD can be assigned to any digital or
// analog pins...but we'll use the analog pins as this allows us to
// double up the pins with the touch screen (see the TFT paint example).
// #define LCD_CS A3 // Chip Select goes to Analog 3
// #define LCD_CD A2 // Command/Data goes to Analog 2
// #define LCD_WR A1 // LCD Write goes to Analog 1
// #define LCD_RD A0 // LCD Read goes to Analog 0

// #define LCD_RESET A4 // Can alternately just connect to Arduino's reset pin

// When using the BREAKOUT BOARD only, use these 8 data lines to the LCD:
// For the Arduino Uno, Duemilanove, Diecimila, etc.:
//   D0 connects to digital pin 8  (Notice these are
//   D1 connects to digital pin 9   NOT in order!)
//   D2 connects to digital pin 2
//   D3 connects to digital pin 3
//   D4 connects to digital pin 4
//   D5 connects to digital pin 5
//   D6 connects to digital pin 6
//   D7 connects to digital pin 7
// For the Arduino Mega, use digital pins 22 through 29
// (on the 2-row header at the end of the board).


#include <Adafruit_GFX.h>    // Core graphics library
#include <SWTFT.h> // Hardware-specific library
#include <TouchScreen.h>




#define YP A1  // must be an analog pin, use "An" notation!
#define XM A2  // must be an analog pin, use "An" notation!
#define YM 7   // can be a digital pin
#define XP 6   // can be a digital pin

#define TS_MINX 150
#define TS_MINY 120
#define TS_MAXX 920
#define TS_MAXY 940

// For better pressure precision, we need to know the resistance
// between X+ and X- Use any multimeter to read it
// For the one we're using, its 300 ohms across the X plate
TouchScreen ts = TouchScreen(XP, YP, XM, YM, 300);

// Assign human-readable names to some common 16-bit color values:
#define BLACK   0x0000
#define BLUE    0x001F
#define RED     0xF800
#define GREEN   0x07E0
#define CYAN    0x07FF
#define MAGENTA 0xF81F
#define YELLOW  0xFFE0
#define WHITE   0xFFFF
//#define ROZ     0xFD20
#define ROZ     0xFBE0
#define GRI     0xBDF7
// http://stackoverflow.com/questions/13720937/c-defined-16bit-high-color
// http://wiibrew.org/wiki/U16_colors

SWTFT tft;

#define BOXSIZE 40
#define PENRADIUS 3
int oldcolor, currentcolor;
int ics; 

void setup(void) {
  Serial.begin(9600);
  Serial.println(F("Paint!"));
  
  tft.reset();
  
  uint16_t identifier = tft.readID();

  Serial.print(F("LCD driver chip: "));
  Serial.println(identifier, HEX);
    

  tft.begin(identifier);

  tft.fillScreen(BLACK);
  tft.fillRect(0, 0, 320, 240, BLACK);
  tft.setRotation(3);
  tft.setCursor(30, 100);
  tft.setTextColor(RED);  tft.setTextSize(3);
  tft.println("LCD driver chip: ");
  tft.setCursor(100, 150);
  tft.setTextColor(BLUE);
  tft.println(identifier, HEX);

delay(2000);
tft.fillRect(0, 0, 320, 240, BLACK);
  
tft.setRotation(0);
  tft.fillRect(0, 0, BOXSIZE, BOXSIZE, RED);
  tft.fillRect(0, BOXSIZE, BOXSIZE, BOXSIZE, YELLOW);
  tft.fillRect(0, BOXSIZE*2, BOXSIZE, BOXSIZE, GREEN);
  tft.fillRect(0, BOXSIZE*3, BOXSIZE, BOXSIZE, CYAN);
  tft.fillRect(0, BOXSIZE*4, BOXSIZE, BOXSIZE, BLUE);
  tft.fillRect(0, BOXSIZE*5, BOXSIZE, BOXSIZE, MAGENTA);
  tft.fillRect(0, BOXSIZE*6, BOXSIZE, BOXSIZE, GRI);
  tft.fillRect(0, BOXSIZE*7, BOXSIZE, BOXSIZE,  ROZ);
//tft.fillRect(BOXSIZE, BOXSIZE, BOXSIZE, BOXSIZE, WHITE);
 
  tft.drawRect(0, 0, BOXSIZE, BOXSIZE, WHITE);
  currentcolor = RED;


 cifre (WHITE);
  pinMode(13, OUTPUT);
}

#define MINPRESSURE 10
#define MAXPRESSURE 1000

void loop()
{
  digitalWrite(13, HIGH);
  // Recently Point was renamed TSPoint in the TouchScreen library
  // If you are using an older version of the library, use the
  // commented definition instead.
  // Point p = ts.getPoint();
  TSPoint p = ts.getPoint();
  digitalWrite(13, LOW);

  // if sharing pins, you'll need to fix the directions of the touchscreen pins
  //pinMode(XP, OUTPUT);
  pinMode(XM, OUTPUT);
  pinMode(YP, OUTPUT);
  //pinMode(YM, OUTPUT);

  // we have some minimum pressure we consider 'valid'
  // pressure of 0 means no pressing!

  if (p.z > MINPRESSURE && p.z < MAXPRESSURE) {
  /*  
    Serial.print("X = "); Serial.print(p.x);
    Serial.print("\tY = "); Serial.print(p.y);
    Serial.print("\tPressure = "); Serial.println(p.z);
  */      
if (p.y < (TS_MINY-5)) stergere();
    // scale from 0->1023 to tft.width
    p.x = tft.width()-(map(p.x, TS_MINX, TS_MAXX, tft.width(), 0));
    p.y = tft.height()-(map(p.y, TS_MINY, TS_MAXY, tft.height(), 0));
  /*  
    Serial.print("("); Serial.print(p.x);
    Serial.print(", "); Serial.print(p.y);
    Serial.println(")");
  */  
    if (p.x < BOXSIZE) {
       oldcolor = currentcolor;

       if (p.y < BOXSIZE) { 
         currentcolor = RED; 
         tft.drawRect(0, 0, BOXSIZE, BOXSIZE, WHITE); 
//         text (currentcolor);
       } else if (p.y < BOXSIZE*2) {
         currentcolor = YELLOW;
         tft.drawRect(0, BOXSIZE, BOXSIZE, BOXSIZE, WHITE);
//         text (currentcolor);
       } else if (p.y < BOXSIZE*3) {
         currentcolor = GREEN;
         tft.drawRect(0, BOXSIZE*2, BOXSIZE, BOXSIZE, WHITE);
//         text (currentcolor);
       } else if (p.y < BOXSIZE*4) {
         currentcolor = CYAN;
         tft.drawRect(0, BOXSIZE*3, BOXSIZE, BOXSIZE, WHITE);       
//         text (currentcolor);
       } else if (p.y < BOXSIZE*5) {
         currentcolor = BLUE;
         tft.drawRect(0, BOXSIZE*4, BOXSIZE, BOXSIZE, WHITE);        
//         text (currentcolor);
       } else if (p.y < BOXSIZE*6) {
         currentcolor = MAGENTA;
         tft.drawRect(0,BOXSIZE*5, BOXSIZE, BOXSIZE, WHITE);        
//         text (currentcolor);
       } else if (p.y < BOXSIZE*7) {
         currentcolor = GRI;
         tft.drawRect(0,BOXSIZE*6, BOXSIZE, BOXSIZE, WHITE);        
//         text (currentcolor);
       } else if (p.y < BOXSIZE*8) {
         currentcolor = ROZ;
         tft.drawRect(0,BOXSIZE*7, BOXSIZE, BOXSIZE, WHITE);
         stergere();        
       }

text (currentcolor);
//cifre (currentcolor);
       if (oldcolor != currentcolor) {
          if (oldcolor == RED) tft.fillRect(0, 0, BOXSIZE, BOXSIZE, RED);
          if (oldcolor == YELLOW) tft.fillRect(0, BOXSIZE, BOXSIZE, BOXSIZE, YELLOW);
          if (oldcolor == GREEN) tft.fillRect(0, BOXSIZE*2, BOXSIZE, BOXSIZE, GREEN);
          if (oldcolor == CYAN) tft.fillRect(0, BOXSIZE*3, BOXSIZE, BOXSIZE, CYAN);
          if (oldcolor == BLUE) tft.fillRect(0, BOXSIZE*4, BOXSIZE, BOXSIZE, BLUE);
          if (oldcolor == MAGENTA) tft.fillRect(0, BOXSIZE*5, BOXSIZE, BOXSIZE, MAGENTA);
          if (oldcolor == GRI) tft.fillRect(0, BOXSIZE*6, BOXSIZE, BOXSIZE, GRI);
          if (oldcolor == ROZ) tft.fillRect(0, BOXSIZE*7, BOXSIZE, BOXSIZE, ROZ);
     cifre (currentcolor);  
     }
      
    }
   // if (((p.y-PENRADIUS) > BOXSIZE) && ((p.y+PENRADIUS) < tft.height())) {
/*
if (((p.y-PENRADIUS) > 5) && ((p.y+PENRADIUS) < tft.height())) {
   tft.fillCircle(p.x, p.y, PENRADIUS, currentcolor);
    }
*/
if (((p.x-PENRADIUS) > BOXSIZE) && ((p.x+PENRADIUS) < tft.width())) {
   tft.fillCircle(p.x, p.y, PENRADIUS, currentcolor);
    }

  }
}

void text (int culoare) 
{
tft.setRotation(3);
tft.setCursor(70, 80);
          tft.setTextColor(culoare);  tft.setTextSize(5);
 /*         tft.println("niq_ro");
          tft.setCursor(12, 130); tft.setTextSize(3);
          tft.println("www.tehnic.go.ro");
          tft.setCursor(20, 165); tft.setTextSize(2);
          tft.println("nicuflorica.blogspot.ro");
*/
          tft.setCursor(5, 220); tft.setTextSize(2);
          tft.println("arduinotehniq.blogspot.com");
tft.setRotation(0);
}

void cifre (int culoare)
{
// number for "buttons"
 tft.setRotation(3);
 tft.setTextColor(culoare);
 tft.setTextSize(3);
 tft.drawLine(0, 0, 40, 40, culoare);
 tft.drawLine(0, 40, 40, 0, culoare);
// tft.setCursor(15, 10);
// tft.println("1");
 tft.setCursor(55, 10);
 tft.println("1");
 tft.setCursor(95, 10);
 tft.println("2");
 tft.setCursor(135, 10);
 tft.println("3");
 tft.setCursor(175, 10);
 tft.println("4");
 tft.setCursor(215, 10);
 tft.println("5");
 tft.setCursor(255, 10);
 tft.println("6");
 tft.setCursor(295, 10);
 tft.println("7");
  
 tft.setRotation(0);
}

void stergere ()
{
      Serial.println("erase");
      // press the bottom of the screen to erase 
 //     tft.fillRect(0, BOXSIZE, tft.width(), tft.height()-BOXSIZE, BLACK);
   tft.fillRect(0, 0, 240, 320, BLACK);
   tft.setRotation(0);
  tft.fillRect(0, 0, BOXSIZE, BOXSIZE, RED);
  tft.fillRect(0, BOXSIZE, BOXSIZE, BOXSIZE, YELLOW);
  tft.fillRect(0, BOXSIZE*2, BOXSIZE, BOXSIZE, GREEN);
  tft.fillRect(0, BOXSIZE*3, BOXSIZE, BOXSIZE, CYAN);
  tft.fillRect(0, BOXSIZE*4, BOXSIZE, BOXSIZE, BLUE);
  tft.fillRect(0, BOXSIZE*5, BOXSIZE, BOXSIZE, MAGENTA);
  tft.fillRect(0, BOXSIZE*6, BOXSIZE, BOXSIZE, GRI);
  tft.fillRect(0, BOXSIZE*7, BOXSIZE, BOXSIZE,  ROZ);
//tft.fillRect(BOXSIZE, BOXSIZE, BOXSIZE, BOXSIZE, WHITE);
 
  tft.drawRect(0, 0, BOXSIZE, BOXSIZE, WHITE);
  currentcolor = RED;
     cifre (WHITE);  
    }