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

[Yang Yang]

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

[Yang Yang]

Hello

Maybe I miss something. At powerup PA12 is configured to GPIO. And then it is need to be set to OTG_USB_DP. The code to set PA12 as GPIO looks like below

__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_12;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

I  mean what should I do to set PA12 as OTG_USB_DP after these codes. Does HAL_GPIO_DeInit(GPIOA, GPIO_PIN_12) works?

BR

Yang

[SofLit · Accepted solution]

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@Yang Yang wrote:

Hello

Maybe I miss something. At powerup PA12 is configured to GPIO. And then it is need to be set to OTG_USB_DP. The code to set PA12 as GPIO looks like below

__HAL_RCC_GPIOA_CLK_ENABLE();
GPIO_InitStruct.Pin = GPIO_PIN_12;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

I  mean what should I do to set PA12 as OTG_USB_DP after these codes. Does HAL_GPIO_DeInit(GPIOA, GPIO_PIN_12) works?

BR

Yang

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If you meant by this you already configured the IO as inputs then you need to switch to USB function, yes. and enable/configure the USB after.