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Code: Select all

  digitalWrite(slaveSelectPin,LOW);
  WriteADF(0x30,0x01,0x91);    //R
  delayMicroseconds(2500);
  WriteADF(0x8F,0xE9,0x24);    //Func
  delayMicroseconds(2500);
  WriteADF(0x01,0x8E,0x3A);    //N
  SPI.end();
}

int WriteADF(byte a1, byte a2, byte a3) {
  SPI.transfer(a1);
  SPI.transfer(a2);
  SPI.transfer(a3);
  Toggle();
}

Code: Select all

// inslude the SPI library:
#include <LiquidCrystal.h>
#include <SPI.h>
#include <PString.h>

// set pin 10 as the slave select for the digital pot:
const int slaveSelectPin = 3;
// select the pins used on the LCD panel
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
// define some values used by the panel and buttons
int lcd_key     = 0;
int adc_key_in  = 0;
#define btnRIGHT  0
#define btnUP     1
#define btnDOWN   2
#define btnLEFT   3
#define btnSELECT 4
#define btnNONE   5
unsigned long Reg[3];
float Freq;
float Step;

void setup() {
  lcd.begin(16, 2);              // start the library
  lcd.setCursor(0,0);
  // set the slaveSelectPin as an output:
  pinMode (slaveSelectPin, OUTPUT);
  digitalWrite(slaveSelectPin,LOW);
  // initialize SPI:
  SPI.setDataMode(SPI_MODE0);
  SPI.setBitOrder(MSBFIRST);
  SPI.setClockDivider(SPI_CLOCK_DIV128);
  SPI.begin();
  lcd.print("DigiLite VCO");
//  SPI.end();
  Freq = 1250;
  Step = 0.5;
  SetFreq(Freq);  
}

void loop() {
  //lcd.setCursor(9,1);            // move cursor to second line "1" and 9 spaces over
  //lcd.print(millis()/1000);      // display seconds elapsed since power-up
 

  lcd_key = read_LCD_buttons();  // read the buttons

  switch (lcd_key)               // depending on which button was pushed, we perform an action
  {
    case btnRIGHT:
      {
       break;
      }
    case btnLEFT:
      {
       break;
      }
    case btnUP:
      {
       Freq = Freq + Step; 
       SetFreq(Freq);
       break;
      }
    case btnDOWN:
      {
       Freq = Freq - Step;
       SetFreq(Freq);
       break;
      }
    case btnSELECT:
      {
      //lcd.print("SELECT");
      break;
      }
      case btnNONE:
      {
      //lcd.print("NONE  ");
      break;
      }
  }
}
void SetFreq(float Freq)
{
       delay(100);
       char buffer[15];
       PString mystring(buffer, sizeof(buffer));
       mystring.print(Freq);
       mystring.print(" Mhz.");
       lcd.setCursor(0,1);            // move to the begining of the second line
       lcd.print(mystring);
       delay(100);
       ConvertFreq(Freq,Reg);
       WriteADF2(1);
       delayMicroseconds(2500);
       WriteADF2(0);
       delayMicroseconds(2500);
       WriteADF2(2);
       delayMicroseconds(2500);
}
void WriteADF2(int idx)
{
   byte buf[5];
   for (int i = 0; i < 4; i++)                         // "i < [Bits per register / 8]"
     buf[i] = (byte)(Reg[idx] >> (i * 8));
   WriteADF(buf[2],buf[1],buf[0]);
}
int WriteADF(byte a1, byte a2, byte a3) {
  // take the SS pin low to select the chip:
  digitalWrite(slaveSelectPin,LOW);
  delayMicroseconds(10);
  SPI.transfer(a1);
  SPI.transfer(a2);
  SPI.transfer(a3);
  Toggle();
}

int Toggle() {
  digitalWrite(slaveSelectPin,HIGH);
  delayMicroseconds(1);
  digitalWrite(slaveSelectPin,LOW);
}  

// read the buttons
int read_LCD_buttons()
{
  adc_key_in = analogRead(0);      // read the value from the sensor 
 // my buttons when read are centered at these valies: 0, 144, 329, 504, 741
  // we add approx 50 to those values and check to see if we are close
  if (adc_key_in > 1000) return btnNONE; // We make this the 1st option for speed reasons since it will be the most likely result
  if (adc_key_in < 50)   return btnRIGHT;  
  if (adc_key_in < 195)  return btnUP; 
  if (adc_key_in < 380)  return btnDOWN; 
  if (adc_key_in < 555)  return btnLEFT; 
  if (adc_key_in < 790)  return btnSELECT;   
  return btnNONE;  // when all others fail, return this...
}

void ConvertFreq(float freq,unsigned long R[])
{
 int P = 16;
 float RFout = freq;
 int REFin = 10;
 int PFDFreq = 500;
 int RSET = 47000;
 int InternalD2 = 0;
 int OutputD2 = 0;
 int MTLD = 1;
 int CPGain = 0;
 int PDPol = 1;
 int CPActive = 0;
 int CounterReset = 0;
 int LDP = 0;
 int Rcounter = REFin * 1000 / PFDFreq;
 int N = (Rcounter * RFout) / REFin;
 int B = (int)N / P;
 int A = (int)N - (B * P);
 R[0] = (unsigned long)(0 + 1 * pow(2, 2) + CounterReset * pow(2, 4) + 1 * pow(2,5) + PDPol * pow(2, 8) + CPActive * pow(2, 9) +  CPGain * pow(2, 10) + MTLD * pow(2, 11) + 3 * pow(2, 12) + 7 * pow(2, 14) + 7 * pow(2, 17) + 0 * pow(2, 20) + 1 * pow(2, 22));
 R[1] = (unsigned long)(1 + Rcounter * pow(2, 2) + 0 * pow(2, 16) + LDP * pow(2, 18) + 3 * pow(2, 20));
 R[2] = (unsigned long)(2 + A * pow(2, 2) + B * pow(2, 8) + CPGain * pow(2, 21) + OutputD2 * pow(2, 22) + InternalD2 * pow(2, 23));
 //lcd.print(R[2]);
}