STM32F407 USB host enumeration routine is not called

[Paulus]

Hi, my USB host (CDC class) enumeration get stalled when the device is attached and enumeration status is ENUM_IDLE. The "IF then" test statement "if ( USBH_HandleEnum(phost) == USBH_OK)" should call the routine USBH_HandleEnum() but it does not and the calling routine exits immediately. I'm single stepping the code in debug mode within my IDE.

In USBH_StatusTypeDef USBH_Process(USBH_HandleTypeDef *phost) (USBH_Core.c)

....

 case HOST_ENUMERATION:   // The case is host enumeration so that is correctly found

  /* Check for enumeration status */  

 if ( USBH_HandleEnum(phost) == USBH_OK) // this does not test USBH_HandleEnum and heads straight to exit....

  { 

   /* The function shall return USBH_OK when full enumeration is complete */

   USBH_UsrLog ("Enumeration done.");

   phost->device.current_interface = 0;

... etc

The routine that should be called is (same lib USBH_Core.c)

**

 * @brief USBH_HandleEnum 

 *     This function includes the complete enumeration process

 * @param phost: Host Handle

 * @retval USBH_Status

 */

static USBH_StatusTypeDef USBH_HandleEnum (USBH_HandleTypeDef *phost)

{

 USBH_StatusTypeDef Status = USBH_BUSY;  

  

 switch (phost->EnumState)

 {

 case ENUM_IDLE:  

  /* Get Device Desc for only 1st 8 bytes : To get EP0 MaxPacketSize */

  if ( USBH_Get_DevDesc(phost, 8) == USBH_OK)

  {

   phost->Control.pipe_size = phost->device.DevDesc.bMaxPacketSize;

   phost->EnumState = ENUM_GET_FULL_DEV_DESC;

    ...etc

Why is that happening? Is it a compiler error or setting? I don't get compiler errors or warning for this code.

Both routines are within USBH_Core.c so it should be able to call this routine.

edits: I can't set a breakpoint in static USBH_StatusTypeDef USBH_HandleEnum (USBH_HandleTypeDef *phost)

I can set breakpoints in other parts of USBH_Core.c

Thanks,

Paul

[DColl.2]

Hi Paul,

it looks like you're using old firmware (STM32CUbe FW_F1 V1.21.0), please upgrade to latest STM32Cube_FW_F4_V1.25.0

and it should work

Thanks

Dan

[Paulus]

Thanks Dan, I upgraded to the latest STMCube 1.25 firmware and the method

if ( USBH_HandleEnum(phost) == USBH_OK) 

is replaced by

if (phost->device.is_connected)

The new generated code did not had a systick handler implemented, so that was easy fixed by adding

void SysTick_Handler(void)

{

HAL_IncTick();

}

The process now just hangs on statement if (phost->device.is_connected) since the device.is_connected bit is not set. I tried to configure the GPIO as pull up but only when the device is removed, it is detected as disconnected. I will try some physical pull up resistors and see if that helps. Maybe the delays must be increased as well to give the device a chance to respond.

Thanks