Editor - Code Explorer - I/O Pin #'s

[mlsparky]

Good Morning

I am having trouble understanding the pin #'s on the 20x2 chip.

Attached is a screenprint of my compile, which "seems" to assign
my output variables to random pins.

Example: Why doesn't my output variable C.3 go to pin #7 ?

What am I doing wrong?

Thanks for any help, first compile and first picaxe project.

ML Sparky

 

[nick12ab]

These are 'pin numbers', not 'leg numbers'. When using the PICAXE system, 'pin numbers' refer to the I/O pin (e.g. C.7) and 'leg numbers' are used to refer to the physical pins on the chip.

Also the Code Explorer only displays the raw values of constants so when a pin constant is specified in the code (e.g. C.7) the value (15) will be displayed instead.

 

[westaust55]

@ Mlsparky,

Welcome to the PICAXE forum.


Have a loop at the PICAXE chip pin layouts in PICAXE manual 1 at page 11.
http://www.picaxe.com/docs/picaxe_manual1.pdf

You will see that logical pin C.7 is associated with physical leg 3.
This is the way the 8-bit ports are connected in the Microchip PIC chips used by Rev Ed for the PICAXE chips.

The logical pin designators such as B.0, B.1, etc are in reality pre-defined constants in the Programming Editor software where. For example B.0 = 0, B.2 = 1, … B.7 = 7, C.1 = 8 through C.7 = 15 and even higher values for larger chips with ports A, C and D available