stm32f2 MCO switching off

[Boris Hoz]

Posted on November 01, 2017 at 09:33

Hi,

I am migrating from stm32f103 to stm32f205.

stm32f103 allows switching MCO on by HAL_RCC_MCOConfig(RCC_MCO, RCC_MCO1SOURCE_HSE, RCC_MCODIV_1) and off MCO by HAL_RCC_MCOConfig(RCC_MCO, RCC_MCO1SOURCE_NOCLOCK, RCC_MCODIV_1).

However stm32f205 doesn't support RCC_MCO1SOURCE_NOCLOCK.

Is there a way to switch stm32f205 MCO on/off?

Thanks for assistance.

Boris.

#stm32f2-mco-switching-off

[Imen.D]

Posted on November 01, 2017 at 12:20

Hello,

The MCO1 pin is configured in alternate function mode, mapped in PA8. 

To disable it, you can 

configure the pin in 

input floating mode (reset state). 

Best Regards

Imen

[Boris Hoz]

Posted on November 01, 2017 at 12:56

 ,

 ,

Hi Imen,

Thank you for attention to the problem.

As I understand the possible solution is:

void SetMCO( uint32_t mode) {

 , , , GPIO_InitTypeDef GPIO_InitStruct,

 , , , GPIO_InitStruct.Pin = GPIO_PIN_8,

 , , , GPIO_InitStruct.Mode = mode,

 , , , GPIO_InitStruct.Pull = GPIO_NOPULL,

 , , , GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW,

 , , , GPIO_InitStruct.Alternate = GPIO_AF0_MCO,

 , , , HAL_GPIO_Init(GPIOA, &,GPIO_InitStruct),

}

void MCO_On() {

 , , , SetMCO( GPIO_MODE_AF_PP),

}

void MCO_Off() {

 , , , SetMCO( GPIO_MODE_INPUT),

}

Is it right?

Regards, Boris.

01.11.2017 14:21, Imen D �?¿�?¸Ñˆ�?µÑ‚:

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STMicroelectronics Community

<,https://community.st.com/?et=watches.email.thread>,

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Re: stm32f2 MCO switching off

reply from Imen D

<,https://community.st.com/people/DAHMEN.IMEN?et=watches.email.thread>,

in /STM32 MCUs Forum/ - View the full discussion

<,https://community.st.com/message/173769-re-stm32f2-mco-switching-off?commentID=173769&,et=watches.email.thread ♯ comment-173769>,

>,