Naming / Aliasing GPIO pins

Daniel Rairigh

Other Parts Discussed in Thread: TMS320F28335

I am working on code for a TMS320F28335 in Code Composer Studio 6.1.2.00015

I would like to create meaningful aliases for my GPIO pins (ADC_chipselect, LED0, etc.), but I am having trouble coming up with the right way to do it.

I have tried this:

Uint16 *LED0;
LED0 = &GpioDataRegs.GPADAT.bit.GPIO16

but the compiler tells me I can't get the address of a bit field. Aliasing, 32 bits at once is not really going to help me. Can someone point me in the right direction?

Thank you!

Daniel

over 9 years ago

0 Richard Poley over 9 years ago

TI__Mastermind 27200 points

Daniel,

I guess you could just define each bitfield of interest as some meaningful name and then use it in your code, like this:

#define LED GpioDataRegs.GPBDAT.bit.GPIO34
#define LEDTOGGLE GpioDataRegs.GPBTOGGLE.bit.GPIO34

Uint16 var;

LEDTOGGLE = 1;

var = LED;

Any use?

Regards,

Richard

0 Mark Labbato over 9 years ago in reply to Richard Poley

Guru 30330 points

I am pretty certain that you can just #define the statements. For Example:

#define LED0_TOGGLE GpioDataRegs.GPBTOGGLE.bit.GPIO34 = 1
#define LED0_SET GpioDataRegs.GPBSET.bit.GPIO34 = 1
#define LED0_CLEAR GpioDataRegs.GPBCLEAR.bit.GPIO34 = 1

Then, in your code you can just do:

LED0_TOGGLE; // Toggle LED0
or
LED0_CLEAR; // Clear LED0

-Mark

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Naming / Aliasing GPIO pins