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how to set PA11&PA12 to USB_OTG_HS pin after it is set to GPIO

Yang Yang
Associate II

‎2024-12-23 03:05 AM - edited ‎2024-12-23 03:09 AM

Hello, ST experts

 

For some reason, PA12 of STM32U595VGT6 is set to GPIO at start up. But I can not find how to set PA12 to USB_DP again in any alternate function of AF1 to AF15.

 

BR

Yang

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12 REPLIES 12
Andrew Neil
Guru

‎2024-12-23 03:25 AM

Get CubeMX to configure it, then examine the code that it generates?

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SofLit
ST Employee

‎2024-12-23 03:26 AM - edited ‎2024-12-23 03:26 AM

Hello,

The issue is not clear.

I can set PA11 and PA12 for USB in CubeMx for STM32U595.

SofLit_0-1734953121645.png

PS: There is no STM32U595VGT6 part number

 

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STTwo-32
ST Employee

‎2024-12-23 04:13 AM - edited ‎2024-12-23 04:15 AM

HELLO @Yang Yang 

Infact, PA11 and PA12 provide OTG_HS additional functions, and they are not alternate functions:

STTwo32_0-1734956103732.png

When you enable the USB_OTG_HS (as done by my college @SofLit ) those Pins are automatically set to OTG_HS additional functions.

Best Regards.

STTwo-32

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Yang Yang
Associate II
In response to STTwo-32

‎2024-12-23 05:27 AM

Hello, ST experts

 

Yes, actually I found that OTG_HS_DP is additional function. But I don't know how to configure it. In cubemx generated framework is that done by MX_USB_OTG_HS_PCD_Init()?

 

BR

Yang

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SofLit
ST Employee
In response to Yang Yang

‎2024-12-23 05:38 AM

@Yang Yang wrote:

Yes, actually I found that OTG_HS_DP is additional function. But I don't know how to configure it. In cubemx generated framework is that done by MX_USB_OTG_HS_PCD_Init()?

You can use CubeMx and configure USB pins as I showed above.

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STTwo-32
ST Employee
In response to Yang Yang

‎2024-12-23 05:48 AM

Hello @Yang Yang 

It is not required to add the code to configure the USB DP/DM as those pins are directly connected to USB as soon as this peripheral is enabled.

Best Regards.

STTwo-32

 

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Yang Yang
Associate II
In response to STTwo-32

‎2024-12-23 05:49 AM

Hello ST experts

 

In cubemx generated code framework,  Does HAL_GPIO_DeInit(GPIOA, GPIO_PIN_12) can set PA12 to OTG_HS_DP function?

 

BR

Yang

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SofLit
ST Employee
In response to Yang Yang

‎2024-12-23 05:53 AM

The pins config is not generated. These pins are used directly by the USB as soon as the USB is enabled.

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STTwo-32
ST Employee
In response to Yang Yang

‎2024-12-23 05:59 AM - edited ‎2024-12-23 05:59 AM

 PA12 is internally set to OTG_HS_DP as soon as you Enable your USB_OTG as i said on my second comment (no code needed to do that).

Best Regards.

STTwo-32

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