Pin names to pin numbers

oldduffer · August 21, 2020, 2:50pm

I'm using an Arduino nano . I prefer to use Pin Names (A0,A1,A2.... D4,D5,D6 ....etc,etc) instead of the corresponding Pin Numbers (19,20,21, etc, etc, etc).
Right now I use the #define statements to set this up. This works fine but I would like to just use an #include statement to get the same functionality. Is there a header file that I can use?

jremington · August 21, 2020, 3:01pm

The Arduino core already carries out a translation internally, so that pin designations (which you call pin numbers, labeled on the Arduino board) are mapped to internal CPU port and port bit.

The mapping changes between different Arduino models, which is why you need a board definition file.

UKHeliBob · August 21, 2020, 3:13pm

I can understand you preferring to use the A* names for analogue pins, especially when they are used as digital pins, as that distinguishes them from the purely digital pins with the same numbers, but why the aversion to just numbers for the digital only pins ? After all, they are printed on the board.

I assume that you realise that the pin numbers printed on the board are not the actual pin numbers of the AtMega328 chip

wildbill · August 21, 2020, 3:24pm

Better in my view to give each pin a name that relates to what you are using it for.

UKHeliBob · August 21, 2020, 3:41pm

wildbill:
Better in my view to give each pin a name that relates to what you are using it for.

Agreed wholeheartedly but following the OPs logic would lead to declarations such as

const byte ledPin = D2;

when

const byte ledPin = 2;

would be a simple alternative

johnwasser · August 22, 2020, 2:03pm

Here you go:
PinNames.h

#if NUM_DIGITAL_PINS >  0
const byte  D0 = 0 ;
#endif
#if NUM_DIGITAL_PINS >  1
const byte  D1 = 1 ;
#endif
#if NUM_DIGITAL_PINS >  2
const byte  D2 = 2 ;
#endif
#if NUM_DIGITAL_PINS >  3
const byte  D3 = 3 ;
#endif
#if NUM_DIGITAL_PINS >  4
const byte  D4 = 4 ;
#endif
#if NUM_DIGITAL_PINS >  5
const byte  D5 = 5 ;
#endif
#if NUM_DIGITAL_PINS >  6
const byte  D6 = 6 ;
#endif
#if NUM_DIGITAL_PINS >  7
const byte  D7 = 7 ;
#endif
#if NUM_DIGITAL_PINS >  8
const byte  D8 = 8 ;
#endif
#if NUM_DIGITAL_PINS >  9
const byte  D9 = 9 ;
#endif
#if NUM_DIGITAL_PINS >  10
const byte  D10 = 10 ;
#endif
#if NUM_DIGITAL_PINS >  11
const byte  D11 = 11 ;
#endif
#if NUM_DIGITAL_PINS >  12
const byte  D12 = 12 ;
#endif
#if NUM_DIGITAL_PINS >  13
const byte  D13 = 13 ;
#endif
#if NUM_DIGITAL_PINS >  14
const byte  D14 = 14 ;
#endif
#if NUM_DIGITAL_PINS >  15
const byte  D15 = 15 ;
#endif
#if NUM_DIGITAL_PINS >  16
const byte  D16 = 16 ;
#endif
#if NUM_DIGITAL_PINS >  17
const byte  D17 = 17 ;
#endif
#if NUM_DIGITAL_PINS >  18
const byte  D18 = 18 ;
#endif
#if NUM_DIGITAL_PINS >  19
const byte  D19 = 19 ;
#endif
#if NUM_DIGITAL_PINS >  20
const byte  D20 = 20 ;
#endif
#if NUM_DIGITAL_PINS >  21
const byte  D21 = 21 ;
#endif
#if NUM_DIGITAL_PINS >  22
const byte  D22 = 22 ;
#endif
#if NUM_DIGITAL_PINS >  23
const byte  D23 = 23 ;
#endif
#if NUM_DIGITAL_PINS >  24
const byte  D24 = 24 ;
#endif
#if NUM_DIGITAL_PINS >  25
const byte  D25 = 25 ;
#endif
#if NUM_DIGITAL_PINS >  26
const byte  D26 = 26 ;
#endif
#if NUM_DIGITAL_PINS >  27
const byte  D27 = 27 ;
#endif
#if NUM_DIGITAL_PINS >  28
const byte  D28 = 28 ;
#endif
#if NUM_DIGITAL_PINS >  29
const byte  D29 = 29 ;
#endif
#if NUM_DIGITAL_PINS >  30
const byte  D30 = 30 ;
#endif
#if NUM_DIGITAL_PINS >  31
const byte  D31 = 31 ;
#endif
#if NUM_DIGITAL_PINS >  32
const byte  D32 = 32 ;
#endif
#if NUM_DIGITAL_PINS >  33
const byte  D33 = 33 ;
#endif
#if NUM_DIGITAL_PINS >  34
const byte  D34 = 34 ;
#endif
#if NUM_DIGITAL_PINS >  35
const byte  D35 = 35 ;
#endif
#if NUM_DIGITAL_PINS >  36
const byte  D36 = 36 ;
#endif
#if NUM_DIGITAL_PINS >  37
const byte  D37 = 37 ;
#endif
#if NUM_DIGITAL_PINS >  38
const byte  D38 = 38 ;
#endif
#if NUM_DIGITAL_PINS >  39
const byte  D39 = 39 ;
#endif
#if NUM_DIGITAL_PINS >  40
const byte  D40 = 40 ;
#endif
#if NUM_DIGITAL_PINS >  41
const byte  D41 = 41 ;
#endif
#if NUM_DIGITAL_PINS >  42
const byte  D42 = 42 ;
#endif
#if NUM_DIGITAL_PINS >  43
const byte  D43 = 43 ;
#endif
#if NUM_DIGITAL_PINS >  44
const byte  D44 = 44 ;
#endif
#if NUM_DIGITAL_PINS >  45
const byte  D45 = 45 ;
#endif
#if NUM_DIGITAL_PINS >  46
const byte  D46 = 46 ;
#endif
#if NUM_DIGITAL_PINS >  47
const byte  D47 = 47 ;
#endif
#if NUM_DIGITAL_PINS >  48
const byte  D48 = 48 ;
#endif
#if NUM_DIGITAL_PINS >  49
const byte  D49 = 49 ;
#endif
#if NUM_DIGITAL_PINS >  50
const byte  D50 = 50 ;
#endif
#if NUM_DIGITAL_PINS >  51
const byte  D51 = 51 ;
#endif
#if NUM_DIGITAL_PINS >  52
const byte  D52 = 52 ;
#endif
#if NUM_DIGITAL_PINS >  53
const byte  D53 = 53 ;
#endif
#if NUM_DIGITAL_PINS >  54
const byte  D54 = 54 ;
#endif
#if NUM_DIGITAL_PINS >  55
const byte  D55 = 55 ;
#endif
#if NUM_DIGITAL_PINS >  56
const byte  D56 = 56 ;
#endif
#if NUM_DIGITAL_PINS >  57
const byte  D57 = 57 ;
#endif
#if NUM_DIGITAL_PINS >  58
const byte  D58 = 58 ;
#endif
#if NUM_DIGITAL_PINS >  59
const byte  D59 = 59 ;
#endif
#if NUM_DIGITAL_PINS >  60
const byte  D60 = 60 ;
#endif
#if NUM_DIGITAL_PINS >  61
const byte  D61 = 61 ;
#endif
#if NUM_DIGITAL_PINS >  62
const byte  D62 = 62 ;
#endif
#if NUM_DIGITAL_PINS >  63
const byte  D63 = 63 ;
#endif
#if NUM_DIGITAL_PINS >  64
const byte  D64 = 64 ;
#endif
#if NUM_DIGITAL_PINS >  65
const byte  D65 = 65 ;
#endif
#if NUM_DIGITAL_PINS >  66
const byte  D66 = 66 ;
#endif
#if NUM_DIGITAL_PINS >  67
const byte  D67 = 67 ;
#endif
#if NUM_DIGITAL_PINS >  68
const byte  D68 = 68 ;
#endif
#if NUM_DIGITAL_PINS >  69
const byte  D69 = 69 ;
#endif

alto777 · August 22, 2020, 2:43pm

@johnwasser double plus good!

Please tell us you used a program to write that header.

a7

CrossRoads · August 22, 2020, 2:46pm

That's just cruel John
See who has no social life: https://forum.arduino.cc/index.php?action=stats

johnwasser · August 22, 2020, 3:01pm

alto777:
Please tell us you used a program to write that header.

I used a spreadsheet to generate the names and numbers and then a text editor to turn the list into code.

LarryD · August 22, 2020, 3:03pm

You deserve another +1

oqibidipo · August 22, 2020, 11:31pm

johnwasser:
Here you go:
PinNames.h
#if NUM_DIGITAL_PINS >  0

const byte D0 = 0 ;
#endif
...
#if NUM_DIGITAL_PINS > 69
const byte D69 = 69 ;
#endif
#if NUM_DIGITAL_PINS > 0
const byte D0 = 0 ;
#endif
...
#if NUM_DIGITAL_PINS > 69
const byte D69 = 69 ;
#endif

Oops.

johnwasser · August 23, 2020, 1:20pm

oqibidipo:
Oops.

Oops indeed! Somehow I pasted the lines twice. I have edited the post to remove one of the copies. Thanks for catching that.

oldduffer · August 29, 2020, 1:58pm

I'm relative new to the programming the arduino and have a problem associating the pin numbers to use in a sketch and the pin names (A0,D7,D5, etc etc).

Is there an #include statement that I can use to include these names vs pin numbers.
I tried to build a library function to do this but ran into problems.

UKHeliBob · August 29, 2020, 2:00pm

Merged threads asking the same question

Why did you start a second thread ?

oldduffer · August 30, 2020, 1:23pm

I'm new to using this forum. I inadvertently posted the question twice.

My mistake, will be more careful in future.

UKHeliBob · August 30, 2020, 2:58pm

I'm using an Arduino nano . I prefer to use Pin Names (A0,A1,A2.... D4,D5,D6 ....etc,etc) instead of the corresponding Pin Numbers (19,20,21, etc, etc, etc).

I am still confused as to exactly what you want to do. For instance, the Arduino pin number for A0 is not 19, if that is what you meant, nor is it on pin 19 of the ATmega328 chip

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