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Author Topic: Multiplexing Nixie tubes Need help with writing code.  (Read 843 times)
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Hi i want to Multiplex 4 Nixie tubes connected in series at the cathodes. And i plan on turning on each separately at the anode with a Hv NpN transistor. I am using a 71414 BCD driver but i only have one... it's a long story smiley-eek
What i need help with is i don't know how to separate the the minutes and hours.
I am basing my sketch off of a RTC sketch.
So by using Driver(minute, DEC) or Driver(hour, DEC) i would send the number i want out

Well i would like to do that but i need to separate the minutes and hours to where i have 2 one digits number
So say it 12:56
well i don't want it to send 12 and 56 to the BCD driver i want it to send

1 ... First nix on.
Off
2 ... Second nix on.
Off
5 ... Third nix on.
Off
6 ... Forth nix on.

Sorry i will include some code i am using but right now i am away from my home computer
« Last Edit: May 04, 2011, 12:43:45 pm by Eric1180 » Logged

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I don't think you connected the grounds, Dave.
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How about the / and % operators?

If you don't know about the % operator, then you can get by with just / and *
« Last Edit: May 04, 2011, 01:50:31 pm by AWOL » Logged

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How about the / and % operators?

If you don't know about the % operator, then you can get by with just / and *

Ok i first looked at most of the reference  section to see if the was something basic i could understand to fit my need before i posted.

So how exactly do i split 56 (minutes) into 6 for ones
and then 5 for tens?
this is for a clock so the numbers do change
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So how exactly do i split 56 (minutes) into 6 for ones
and then 5 for tens?
The usual way. by dividing by ten.
Unless the value is in BCD, in which case, divide by 16.
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So how exactly do i split 56 (minutes) into 6 for ones
and then 5 for tens?
The usual way. by dividing by ten.
Unless the value is in BCD, in which case, divide by 16.
ok thanks for taking the time to post but i think you over simplified it.
after 2 hour i finally figured out a formula that would separate time 12:56 in to (1-:--)(-2:--)(--:5-)(--:-6)

so the what i created was
 
  Ten = minute / 10;  That gave me the (--:5-)

  val = minute / 10;
  One = minute - (val*10);   That gave me the (--:-6)



Code:
#include <LiquidCrystal.h>
#include "Wire.h"
#define DS1307_I2C_ADDRESS 0x68
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
int Anode1 = 1;
int Anode2 = 2;
int Anode3 = 3;
int Anode4 = 4;
int latchPin = 8;
//Pin connected to SH_CP of 74HC595
int clockPin = 12;
////Pin connected to DS of 74HC595
int dataPin = 11;
int One;
int Ten;
int Hundred;
int Thousand;
int Aval;
int Bval;
// Convert normal decimal numbers to binary coded decimal
byte decToBcd(byte val)
{
  return ( (val/10*16) + (val%10) );
}

// Convert binary coded decimal to normal decimal numbers
byte bcdToDec(byte val)
{
  return ( (val/16*10) + (val%16) );
}

// Stops the DS1307, but it has the side effect of setting seconds to 0
// Probably only want to use this for testing
/*void stopDs1307()
{
  Wire.beginTransmission(DS1307_I2C_ADDRESS);
  Wire.send(0);
  Wire.send(0x80);
  Wire.endTransmission();
}*/

// 1) Sets the date and time on the ds1307
// 2) Starts the clock
// 3) Sets hour mode to 24 hour clock
// Assumes you're passing in valid numbers
void setDateDs1307(byte second,        // 0-59
                   byte minute,        // 0-59
                   byte hour,          // 1-23
                   byte dayOfWeek,     // 1-7
                   byte dayOfMonth,    // 1-28/29/30/31
                   byte month,         // 1-12
                   byte year)          // 0-99
{
   Wire.beginTransmission(DS1307_I2C_ADDRESS);
   Wire.send(0);
   Wire.send(decToBcd(second));    // 0 to bit 7 starts the clock
   Wire.send(decToBcd(minute));
   Wire.send(decToBcd(hour));      // If you want 12 hour am/pm you need to set
                                   // bit 6 (also need to change readDateDs1307)
   Wire.send(decToBcd(dayOfWeek));
   Wire.send(decToBcd(dayOfMonth));
   Wire.send(decToBcd(month));
   Wire.send(decToBcd(year));
   Wire.endTransmission();
}

// Gets the date and time from the ds1307
void getDateDs1307(byte *second,
          byte *minute,
          byte *hour,
          byte *dayOfWeek,
          byte *dayOfMonth,
          byte *month,
          byte *year)
{
  // Reset the register pointer
  Wire.beginTransmission(DS1307_I2C_ADDRESS);
  Wire.send(0);
  Wire.endTransmission();

  Wire.requestFrom(DS1307_I2C_ADDRESS, 7);

  // A few of these need masks because certain bits are control bits
  *second     = bcdToDec(Wire.receive() & 0x7f);
  *minute     = bcdToDec(Wire.receive());
  *hour       = bcdToDec(Wire.receive() & 0x3f);  // Need to change this if 12 hour am/pm
  *dayOfWeek  = bcdToDec(Wire.receive());
  *dayOfMonth = bcdToDec(Wire.receive());
  *month      = bcdToDec(Wire.receive());
  *year       = bcdToDec(Wire.receive());
}

void setup()
{
  byte second, minute, hour, dayOfWeek, dayOfMonth, month, year;
  Wire.begin();
  Serial.begin(9600);

  // Change these values to what you want to set your clock to.
  // You probably only want to set your clock once and then remove
  // the setDateDs1307 call.0000000000000000000
  second = 0;
  minute = 0;
  hour = 0;
  dayOfWeek = 0;
  dayOfMonth = 0;
  month = 0;
  year = 0;
  pinMode(latchPin, OUTPUT);
  pinMode(clockPin, OUTPUT);
  pinMode(dataPin, OUTPUT);
  pinMode(Anode1, OUTPUT);
  pinMode(Anode2, OUTPUT);
  pinMode(Anode3, OUTPUT);
  pinMode(Anode4, OUTPUT);
}

void loop()


 
  // print the number of seconds since reset:
  byte second, minute, hour, dayOfWeek, dayOfMonth, month, year;

  getDateDs1307(&second, &minute, &hour, &dayOfWeek, &dayOfMonth, &month, &year);
  Serial.print(hour, DEC);
  Serial.print(":");
  Serial.print(minute, DEC);
  Serial.print(":");
  Serial.print(second, DEC);
  Serial.print("  ");
  Serial.print(month, DEC);
  Serial.print("/");
  Serial.print(dayOfMonth, DEC);
  Serial.print("/");
  Serial.print(year, DEC);
  Serial.print("  Day_of_week:");
  Serial.print(dayOfWeek, DEC);
  Serial.print("  ");
  Serial.print(Thousand, DEC);

  Serial.print(Hundred, DEC);

  Serial.print(Ten, DEC);
 
  Serial.print(One, DEC);
  Serial.print("  ");
  Serial.println(One, BIN);
 
  Thousand = hour / 10;

  Aval = hour / 10;
  Hundred = hour - (Aval*10);

  Ten = minute / 10;

  Bval = minute / 10;
  One = minute - (Bval*10);
 
 
 
    digitalWrite(latchPin, LOW);
    shiftOut(dataPin, clockPin, MSBFIRST, Thousand); 
    digitalWrite(latchPin, HIGH);
    digitalWrite(Anode1, HIGH);
    delay(1);
    digitalWrite(Anode1, LOW);
   
    digitalWrite(latchPin, LOW);
    shiftOut(dataPin, clockPin, MSBFIRST, Hundred); 
    digitalWrite(latchPin, HIGH);
    digitalWrite(Anode2, HIGH);
    delay(1);
    digitalWrite(Anode2, LOW);
   
    digitalWrite(latchPin, LOW);
    shiftOut(dataPin, clockPin, MSBFIRST, Ten); 
    digitalWrite(latchPin, HIGH);
    digitalWrite(Anode3, HIGH);
    delay(1);
    digitalWrite(Anode3, LOW);
   
    digitalWrite(latchPin, LOW);
    shiftOut(dataPin, clockPin, MSBFIRST, One); 
    digitalWrite(latchPin, HIGH);
    digitalWrite(Anode4, HIGH);
    delay(1);
    digitalWrite(Anode4, LOW);
}
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