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Putting SPI pins in high impedance mode
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Putting SPI pins in high impedance mode

Chrigu posted on 15 Nov 2012 11:55 PM PST
Member
6 Forum Posts

Hi Everybody

I search a way to put the SPI pins in high impedance mode. Does the function CyU3PSpiDeInit() put all SPI pins of the FX3 in high impedance mode or is there another way to do that?

Thank you

Chris

Re: Putting SPI pins in high impedance mode

Lumpi6 posted on 15 Nov 2012 01:12 AM PST
Top Contributor
183 Forum Posts

Hi,

the SpiDeInit function may put the pins into high impedance but if not and you want to do it safely, then you can additional use after the SpiDeInit the GpioOverride function to override each SPI pin as an input. That should then really do what you like to have. To re-activate the SPI you may reinitialize the iomatrix, that can be a bit tricky.

regards,

lumpi

Re: Putting SPI pins in high impedance mode

Lumpi6 posted on 15 Nov 2012 01:13 AM PST
Top Contributor
183 Forum Posts

Hi,

I forgot, always check the return values of the Override or the IoMatrix function to check if configuration was successful.

regards

Re: Putting SPI pins in high impedance mode

Chrigu posted on 15 Nov 2012 01:43 AM PST
Member
6 Forum Posts

Ok, i will try this.

Thank you lumpi!

Re: Putting SPI pins in high impedance mode

Lumpi6 posted on 21 Nov 2012 02:29 AM PST
Top Contributor
183 Forum Posts

Hi Chrigu,

was it successful?

regards,

lumpi

Re: Putting SPI pins in high impedance mode

Chrigu posted on 21 Nov 2012 04:27 AM PST
Member
6 Forum Posts

Hi Lumpi..

I used CyU3PSpiDeInit() and checked the SPI pins then. They are in fact high impedant. So i'm happy with this solution.

Thanks for your help Lumpi.

Best regards

Re: Putting SPI pins in high impedance mode

Lumpi6 posted on 21 Nov 2012 08:16 AM PST
Top Contributor
183 Forum Posts

Hi Chrigu,

you are welcome. Great to know that  it works...

regards,

lumpi



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