GPIO63 as a IO line.

Andrew Barnes

Other Parts Discussed in Thread: TMS320F28335

I have GPIO63 connected to a FET to control external hardware. I am having trouble getting GPio63 do act as an IO. The dollowing code is not working for me.

EALLOW;
GpioCtrlRegs.GPBMUX2.bit.GPIO63 = 0;// GPIO
GpioCtrlRegs.GPBDIR.bit.GPIO63 = 1; //config port terminal as output
EDIS;

GpioDataRegs.GPBSET.bit.GPIO63 = 1;

Is there anything else I need to do?

over 10 years ago

0 Adam Haun over 10 years ago

TI__Expert 8950 points

Andrew,

Which part number is this?

Thanks,

0 Andrew Barnes over 10 years ago in reply to Adam Haun

Intellectual 600 points

Sorry about that , it's the TMS320F28335. I'm using a control card on a PCB that I made in-house. The one thing I have left to get working is to have the control card sampling a thermistor for temperature. A FET is used to bring the low side of the thermistor to ground when I want to sample it ( it's a simple voltage divider). GPIO63 is tied to the gate of the FET ( I'm using a 100k pulldown on the gate) but I can't seem to take control of GPIO63.

0 Gautam Iyer over 10 years ago in reply to Andrew Barnes

Guru 192875 points

Hi Andrew,

Try toggling GPIO63 without connecting it to any external part.

Regards,
Gautam

0 Andrew Barnes over 10 years ago in reply to Gautam Iyer

Intellectual 600 points

Got it all worked out. The control card was not making contact with some of the DIM100 lines.

0 Gautam Iyer over 10 years ago in reply to Andrew Barnes

Guru 192875 points

Great!

Goodluck and Regards,
Gautam

C2000™︎ microcontrollers

C2000 microcontrollers forum

GPIO63 as a IO line.