MSP432 PORT3 PIN0 doesnt tend high, even if register tells so

Benjamin Brammer14

Hi Guys,

I am a little bit confused here. As I need PORT3 PIN0 as a chip select port for SPI I defined HIGH and LOW macros with the appropriate driver lib functions. As I was debugging my program, I wondered why the chip select doesn't go high, even if the register value is 1. So I started to measure, but the PIN actually isn't on Vcc.

How is this possible..even if the register value tells the opposite.

I am unfortunetely using an XMS-chip version on a custom board.

best regards

Benni

over 8 years ago

0 Chris Sterzik over 8 years ago

TI__Guru 55561 points

What is the value of the P3SEL1 bit0? If it is high and the P3DIR is also high, then the output is DVSS.

Regards,
Chris

0 Benjamin Brammer14 over 8 years ago in reply to Chris Sterzik

Intellectual 810 points

Hello,

no, there is no secondary or tertiary module function enabled. Here is a screenshoot of the register values:

as you can see, the PIN0 should be high. I also don't measure anything on the PIN0.

best regards

Benni

0 Dennis Eichmann over 8 years ago in reply to Benjamin Brammer14

Guru 74080 points

Your P3DIR register is 0x00, so no pin is actually configured to be an output.

0 Benjamin Brammer14 over 8 years ago in reply to Dennis Eichmann

Intellectual 810 points

Noah! I'm a sheep, did see this before, but my prior post wasn't posted.
I feel really embarrassed, this such a noop fault -_-

sorry for bothering you guys with this!

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MSP432 PORT3 PIN0 doesnt tend high, even if register tells so