Compiler/MSP432P401R: C language code difference between MSP430 and MSP432

Rafael Rodriguez53823

Prodigy 130 points

Part Number: MSP432P401R

Tool/software: TI C/C++ Compiler

Hello everybody:

I have a code question. It may be a silly question but I am a beginner so please have patience.

I have been working with the MSP430F5529 Launchpad for a couple of years and just purchased my new MSP432.

I noticed that the example code is a little bit different; for example to configure a port, instead of P1DIR |= BIT0;, it has P1->DIR |= BIT0;

If I enter as the first example, it will work fine.

I was just wondering if there is any benefit of the second example over the first example.

Is it faster or easier for the processor? or, Can I just continue to write the code as I did with the '5529?

Would really appreciate any comment.

Thanks!

Ralf

over 6 years ago

0 Hossein Forouzani over 6 years ago

Genius 3030 points

Hi Ralf,

Would you please give us a little bit more details about the issue?

Thanks,
Hossein

0 Keith Barkley over 6 years ago

Guru 35580 points

If you dig a little bit you will probably find that P1DIR is #defined as P1->DIR.

0 Rafael Rodriguez53823 over 6 years ago in reply to Keith Barkley

Prodigy 130 points

So, basically it is the same thing. Right?
Thanks. That's all I needed to know.

Ralf.

0 Keith Barkley over 6 years ago in reply to Rafael Rodriguez53823

Guru 35580 points

Yes, eventually it points to the same register, namely the Port 1 Direction Register.

0 Chris Sterzik over 6 years ago

TI__Guru 53525 points

Rafael,

Yes, they are basically the same. The P1->DIR format follows the CMSIS standard from ARM, while the P1DIR |= is the 'classic' format used in MSP430. When you download the sdk you can see that there are two header files associated with the device and one of those has '_classic' in the name.

C:\ti\simplelink_msp432p4_sdk_2_10_00_14\source\ti\devices\msp432p4xx\inc

You will see that the newer devices (P401v,y,P411,P4x11) do not have classic alternatives.

Regards,

Chris

0 Rafael Rodriguez53823 over 6 years ago in reply to Chris Sterzik

Prodigy 130 points

Thank you very much Chris.

This is exactly what I was looking for.

Best regards.

Ralf

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Compiler/MSP432P401R: C language code difference between MSP430 and MSP432