STM3220G-EVAL USB_OTG_FS port

Posted on February 18, 2015 at 12:47

Is D+ line in USB_OTG_FS port using any pull up in STM3220G-EVAL?

Because in STM32CubeF2 code for USB device, I see that D+ line and D- lines are not pulled up

/* Configure DM DP Pins */

GPIO_InitStruct.Pin = (GPIO_PIN_11 | GPIO_PIN_12);

GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;

GPIO_InitStruct.Pull = GPIO_NOPULL;

GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;

GPIO_InitStruct.Alternate = GPIO_AF10_OTG_FS;

HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

However eval board USB was detected by PC(Host)

Please clarify on this

Thanks

Sangamesh

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