STM32G031F8 CLOCK PINS as GPIO Input

[fpgiovanini]

Dear Mr. Pillon
Is it possible to use PC14-OSCX_IN 2 and PC15-OSCX_OUT (default) as GPIO input?
I already tried with pinMode(xxx, INPUT_PULLUP);
xxx: PC14 PC15 PB9 D24 D25 but don´t worked.
tks in advance.

[fpistm]

Hi,
as far as I can tell it is possible.

I don't have this chip so I can't test anyway it is very generic and don't see, why it does not work while you don't enable LSE or HSE.

[fpgiovanini]

Hi.
You are right and I agree with your explanation .
In the generic_clock.c C:\Users\fpgio\AppData\Local\Arduino15\packages\STMicroelectronics\hardware\stm32\2.12.0\variants\STM32G0xx\G031F(4-6-8)P_G031Y8Y_G041F(6-8)P_G041Y8Y
the clock is setup as :
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
RCC_OscInitStruct.HSIState = RCC_HSI_ON;

[fpistm]

You should try to debug and check GPIO registers to see if it is well configured but honestly don't know why not 😉

[fpistm]

I will try tomorrow with a Nucleo G031K if I found one.

[fpistm]

I've tested and it works as expected. So probably hardware issue with your board.

[fpgiovanini]

Hi Mr Pillon Tks Enviado do Outlook<http://aka.ms/weboutlook>

…

________________________________ De: Frederic Pillon ***@***.***> Enviado: quinta-feira, 28 de maio de 2026 05:16 Para: stm32duino/Arduino_Core_STM32 ***@***.***> Cc: fpgiovanini ***@***.***>; Author ***@***.***> Assunto: Re: [stm32duino/Arduino_Core_STM32] STM32G031F8 CLOCK PINS as GPIO Input (Discussion #2981) I've tested and it works as expected. So probably hardware issue with your board. — Reply to this email directly, view it on GitHub<#2981?email_source=notifications&email_token=ALS7Q7U7ONDEDOIIYHEGQAL447YW3A5CNFSNUABIM5UWIORPF5TWS5BNNB2WEL2ENFZWG5LTONUW63SDN5WW2ZLOOQXTCNZQHA3DSNZTUZZGKYLTN5XKMYLVORUG64VFMV3GK3TUVRTG633UMVZF6Y3MNFRWW#discussioncomment-17086973>, or unsubscribe<https://github.com/notifications/unsubscribe-auth/ALS7Q7QSAEK2SN3JYTUN6ML447YW3AVCNFSM6AAAAACZODU6HOVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTOMBYGY4TOMY>. Triage notifications, keep track of coding agent tasks and review pull requests on the go with GitHub Mobile for iOS<https://github.com/notifications/mobile/ios/ALS7Q7UF7KOGUJFJGWQKCLL447YW3A5CNFSNUABIM5UWIORPF5TWS5BNNB2WEL2ENFZWG5LTONUW63SDN5WW2ZLOOQXTCNZQHA3DSNZTUZZGKYLTN5XKMYLVORUG64VFMV3GK3TUVJTG633UMVZF62LPOM> and Android<https://github.com/notifications/mobile/android/ALS7Q7RQCXRRCCQURYBKHZT447YW3A5CNFSNUABIM5UWIORPF5TWS5BNNB2WEL2ENFZWG5LTONUW63SDN5WW2ZLOOQXTCNZQHA3DSNZTUZZGKYLTN5XKMYLVORUG64VFMV3GK3TUVZTG633UMVZF6YLOMRZG62LE>. Download it today! You are receiving this because you authored the thread.Message ID: ***@***.***>