Configure STM32F072 PC15 as input port

tpeng.1 · ‎2022-04-13

I try to configure STM32F072 PC15 as input I/O using STM32F0xx Standard Peripherals Firmware Library, but not successful.

Ask for help.

Tim

Peter BENSCH · ‎2022-04-13

Have you looked at the examples in the SPL?

How did you try to initialise the GPIO?

Regards

/Peter

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TDK · ‎2022-04-13

PC15 may have RTC/LSE functionality that needs disabled. Show your code.

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tpeng.1 · ‎2022-04-13

Hi Peter and TDK,

Thank your reply.

Where is the examples in the SPL (SPI)? In STM32F0xx_StdPeriph_Lib_V1.5.0/../STM32F0xx_StdPeriph_Examples?

Here is my code:

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);

PWR_BackupAccessCmd( ENABLE );

RCC_LSEConfig( RCC_LSE_OFF );

GpioDriverInit(GpioC,GpioPin15,GpioInput);

Br,

Tim

waclawek.jan · ‎2022-04-14

Why do you think you cannot set the pin? Maybe it's a hardware problem.

> PWR_BackupAccessCmd( ENABLE );

You need to enable PWR clock in RCC first.

To test, you can do this all directly in registers in debugger, don't need to write any code.

JW