GPIO CONFIGURATION IN TRISTATE mode

[Mahalakshmisudhakar]

shall we able to configure stm32g431mb gpio to high impedence state when configured as output pin. We need to access output pin in tristate mode

 

[Danish1]

Look at the Reference Manual for your stm32.

This will tell you how bits in the appropriate GPIOx->MODER control whether a pin is output or input.

When you want to go from output to tri-state (digital input) you can reprogram those bits.

There probably is a HAL way to do this, but I don't find it adequately documented.

[Michal Dudka]

Of course. Set output type to mode "open drain" and write "high" to pin. Then it will be output in HiZ.

[Andrew Neil]

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@Mahalakshmisudhakar wrote:

 We need to access output pin in tristate mode

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What do you mean by that? What "access" ?

[Jacob WOODRUFF]

Hi All,

 

This post has been escalated to the ST Online Support Team for additional assistance. We'll contact you directly.

 

Regards,
Jake

ST Support