Read GPIO data as input TMS320F28335 and use in if else condition

Shahid Atiq

Other Parts Discussed in Thread: CONTROLSUITE

Hi dears

I am trying to give square wave on the GPIO 21 and want to read this data to take some action according to its state as one or zero in square wave. I am using following code

#define Hall_a (GpioDataRegs.GPADAT.bit.GPIO21);

Hall_a_result =0;

void Hall_Sensor()
{

EALLOW;
GpioCtrlRegs.GPAMUX2.bit.GPIO21 = 0;
GpioCtrlRegs.GPADIR.bit.GPIO21 = 0;
GpioCtrlRegs.GPAPUD.bit.GPIO21 = 0;
EDIS;

if (Hall_a==1) // Here it gives error
Hall_a_result =1;
else
Hall_a_result = 2;

}

In if condition I want to check whether it is one or zero at the GPIO pin through external square wave source. How can I do this. Please help

Best Regards

Shahid

over 11 years ago

0 Gautam Iyer over 11 years ago

Guru 192875 points

Hi Shahid,

Why not use the GPIO as an external interrupt? That would make more sense!

Example code for external interrupt is present in controlSuite. Do refer the same.

Regards,

Gautam

0 Shahid Atiq over 11 years ago in reply to Gautam Iyer

Intellectual 305 points

Dear Gautam

Actually on my custom DSP control board my Hall sensors are attached at GPIO 21,25,27. However there are two external interrputs XINT1 and XINT2 mapped on GPIO A port. while XINT3~XINT~6 are mapped on GPIO54,55,56,57.

So I cant use my board for three external interrupts on GPIO 21,25,27.

Moreover I just want to start my PMSM by some how and try to read the hall signals so that when one combination of Hall signal output occurs I should give next commutation signal to my inverter and so on. Therefor I am trying to read the square wave generated by Hall sensors to generate commutation signal for inverter to start PMSM. I dont have any other sophisticated method or anyother feedback to start the machine

Best Regards

Shahid

0 Gautam Iyer over 11 years ago in reply to Shahid Atiq

Guru 192875 points

Sure, no problem. Try this:

Just replace:

#define Hall_a (GpioDataRegs.GPADAT.bit.GPIO21);

#define Hall_a GpioDataRegs.GPADAT.bit.GPIO21

Regards,

Gautam

0 Shahid Atiq over 11 years ago in reply to Gautam Iyer

Intellectual 305 points

Thanx dear Gautam

It works fine now.

Now I try to start my machine with this technique and lets see if I am able to do so in this way

Best Regards

Shahid

0 Frank Bormann over 11 years ago

Mastermind 7585 points

#define Hall_a GpioDataRegs.GPADAT.bit.GPIO21

0 Gautam Iyer over 11 years ago in reply to Shahid Atiq

Guru 192875 points

That's Great!

Goodluck & Regards,

Gautam

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Read GPIO data as input TMS320F28335 and use in if else condition