Dec to 16 bit BIN ?

Projects General Guidance
1

Firstly I must apologise if the answer to this is elsewhere within the forum, I have searched and googled most of my monthly data allowance away trying to find the answer.

Is there a way to convert a four digit DEC value to 16 bit BIN ?

Example
As Decimal: 1234
As Binary: 0000010011010010

Thank you in advance

2

Please rephrase. Are the values numbers or text.

3

sterretje:
Please rephrase. Are the values numbers or text.

Hi they are numbers as in the example.
I think I may have found the solution, I am just running it over and over and checking the results.

void setup()
{
Serial.begin(9600);

}

void loop()
{ 
int myNum = 4321;
int zeros = String(myNum,BIN).length();//This will check for the length of myNum in binary.


String myStr;
for (int i=0; i < 16 - zeros; i++) {//This will add zero to string as need
myStr = myStr + "0";
}
myStr = myStr + String(myNum,BIN);
Serial.println(myStr); 
delay(1000);
}
4

Try

void setup() {
Serial.begin(9600);
int x=1234;
Serial.println(x,BIN);
}

void loop() {}
5

C++ String is very unsuited to Arduino.

Every time you add a char, the String copies itself with the added char then deletes the old copy leaving a hole in the heap. As that keeps happening, RAM gets wasted. An Uno or Nano only has 2048 bytes RAM for heap and stack.

With C strings you set up RAM enough to hold the longest text you will put in there + 1 byte for a terminating zero.

A char array with ASCII text values ending with a zero is what a C string is.

You can learn the functions in string.h but you can also manipulate C string text as char values in an array, which is all those functions do.

The standard C libraries used by Arduino:
http://www.nongnu.org/avr-libc/user-manual/modules.html

The string.h library:
http://www.nongnu.org/avr-libc/user-manual/group__avr__string.html

C strings do not make copies of themselves behind your back. They are only text data.

6

Assigning the number to an unsigned integer might achieve what you want.
There are functions for parsing individual bits out of a number. see: bit() etc.
The documentation for such functions is unfortunately of such a lamentable state that it is not clear what datatypes these can take.