USB Device Connection and Disconnection

[Nico3]

STM32F4 is working in USB Device MSC mode successfully.

I need to detect the USB connection state. I put the HAL_PCD_ConnectCallback function in main.c but on compiling I received warning.

Debug/../USB_DEVICE/Target/usbd_conf.c:307: multiple definition of `HAL_PCD_ConnectCallback';

I see it is weak in HAL_PCB_IRQHandler. Please suggest what I am missing. 

 

 

[AScha.3]

Maybe not change the ConnectCallback ...try: 

 

USBD_Get_USB_Status() -> until : usb_status = USBD_OK;

 

[Nico3]

I just realized.. i can simply use PA9 to detect. 

[Nico3]

STM32F4 is set in USB DEVICE MSC mode.

I am seeing LED is glowing even when USB is not connected to HOST laptop.  Intensity of LED glowing is low.  Anyway, on connection to HOST laptop, the LED glow at high intensity which makes sense.

I am not using PA9 for VBUS detection. I set PA9 in reset condition and also rise/fall edge detection with PD but still LED2 is glowing.

Does USB hardware in STM32 always provide some power to PA9 pin ?

 

[Pavel A.]

>I received warning

Read the compiler messages carefully, there must be reference to previous definition.