MSP-EXP430FR2355: Curious about ports A through C

From my point of view, you need to maintain your project, this header file is some kind of superset header file which may contain more pins than the device actually has.

Based on your device part number and package, you can modify your own header file to fit into your project.

Hope this make sense to you.

From the guide (8.1):

"Individual ports can be accessed as byte-wide ports or can be combined into word-wide ports and
accessed by word formats. Port pairs P1 and P2, P3 and P4, P5 and P6, P7 and P8, and so on, are
associated with the names PA, PB, PC, PD, and so on, respectively."

David Schultz said:

"Individual ports can be accessed as byte-wide ports or can be combined into word-wide ports and
accessed by word formats. Port pairs P1 and P2, P3 and P4, P5 and P6, P7 and P8, and so on, are
associated with the names PA, PB, PC, PD, and so on, respectively."

Refer to the register here: P1IN_L and P1IN_H

User guide 8.4 Digital I/O Registers

You can get corresponding PIN name in 4.2 here: datasheet 4.2 Pin Attributes

All pin should be Px.y, x and y are both number like: P1.2 in device FR2355

  PAOUT = 0;
    802a:       82 43 02 02     mov     #0,     &0x0202 ;r3 As==00

0000802e <.Loc.25.1>:
  P1OUT = P2OUT = 0;
    802e:       c2 43 03 02     mov.b   #0,     &0x0203 ;r3 As==00

00008032 <.Loc.25.1>:
    8032:       c2 43 02 02     mov.b   #0,     &0x0202 ;r3 As==00