Posted on April 08, 2015 at 22:00Hi,
I have a STM32F4-Discovery board and I am trying to detect a memory stick using the USB library generated by CubeMX (Mass Storage Class).
The USB process state machine have the following states:
/* Following states are used for gState */
typedef enum
{
HOST_IDLE =0,
HOST_DEV_WAIT_FOR_ATTACHMENT,
HOST_DEV_ATTACHED,
HOST_DEV_DISCONNECTED,
HOST_DETECT_DEVICE_SPEED,
HOST_ENUMERATION,
HOST_CLASS_REQUEST,
HOST_INPUT,
HOST_SET_CONFIGURATION,
HOST_CHECK_CLASS,
HOST_CLASS,
HOST_SUSPENDED,
HOST_ABORT_STATE,
}HOST_StateTypeDef;
When I attach my memory stick in the board, the state machine goes to the HOST_CLASS_REQUEST state and never leaves it.
The problem is that I never get a OK status, but I never get a ABORT also.
case HOST_CLASS_REQUEST:
/* process class standard control requests state machine */
if(phost->pActiveClass != NULL)
{
status = phost->pActiveClass->Requests(phost);
if(status == USBH_OK)
{
phost->gState = HOST_CLASS;
}
}
else
{
phost->gState = HOST_ABORT_STATE;
USBH_ErrLog (''Invalid Class Driver.'');
#if (USBH_USE_OS == 1)
osMessagePut ( phost->os_event, USBH_STATE_CHANGED_EVENT, 0);
#endif
}
break;
What can I do?
Thanks in advance!
