Здравствуйте.Появилась потребность в синтезаторе для трансивера.Взял готовый пример http://www.ad7c.com/projects/ad9850-dds-vfo/ и решил адаптировать его под цветной tft дисплей.Возникла трудность,при вращении н-кодера цифры на дисплее не обнавляются,а как бы пишутся поверх старых,т е был 0 а сверху написаллас 1 2 3 4 и в итоге каша. Подскажите что нужно добавить в коде?Может нужно сбрасывать постоянно при обновлении переменной,но как?

#include <rotary.h>
#include <EEPROM.h>
//Setup some items
#define W_CLK 4   // Pin 8 - connect to AD9850 module word load clock pin (CLK)
#define FQ_UD 5   // Pin 9 - connect to freq update pin (FQ)
#define DATA 6   // Pin 10 - connect to serial data load pin (DATA)
#define RESET 7  // 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.
int_fast32_t rx=7200000; // Starting frequency of VFO
int_fast32_t rx2=1; // variable to hold the updated frequency
int_fast32_t increment = 10; // starting VFO update increment in HZ.
int buttonstate = 0;
String hertz = "10 Hz";
int  hertzPosition = 5;
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 = 1;  // 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!


#include "SPI.h"
#include "Adafruit_GFX.h"
#include "Adafruit_ILI9341.h"
#define TFT_DC 9
#define TFT_CS 10
#define TFT_MOSI 11
#define TFT_CLK 13
#define TFT_RST 8
#define TFT_MISO 12
Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC, TFT_MOSI, TFT_CLK, TFT_RST, TFT_MISO);

void setup() {
 
 
  tft.begin();
  tft.setRotation(1);
  tft.fillScreen(ILI9341_BLACK);


pinMode(A0,INPUT); // Connect to a button that goes to GND on push
  digitalWrite(A0,HIGH);
  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.   
   // 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 <=1000000){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 == 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 = 10; hertz = "10 Hz"; hertzPosition=5;};  
   //lcd.setCursor(0,1); ****************************************************************************************************************************
   //lcd.print("                ");
   //lcd.setCursor(hertzPosition,1); 
   //lcd.print(hertz); 

 tft.setTextColor(ILI9341_GREEN);
   tft.setTextSize(3);
   tft.setCursor(0,1);
   tft.print("                ");
   tft.setCursor(hertzPosition,1); 
   tft.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("                ");
   tft.setTextColor(ILI9341_GREEN);
   tft.setTextSize(3);
   if (millions > 9){tft.setCursor(0, 0);}
   else{tft.setCursor(0, 6);}
    tft.print(millions);
    tft.print(".");
    tft.print(hundredthousands);
    tft.print(tenthousands);
    tft.print(thousands);
    tft.print(".");
    tft.print(hundreds);
    tft.print(tens);
   tft.print(ones);
    tft.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
};