void USBDEP_Ep0Handler( USBD_Device_TypeDef *device )
{
int status;
USBD_Ep_TypeDef *ep;
static uint32_t xferred;
static USB_XferCompleteCb_TypeDef callback;
#ifdef __MBED__
(void)xferred;
(void)status;
ep = &device->ep[ 0 ];
if ( ( ep->state == D_EP_TRANSMITTING ) || ( ep->state == D_EP_RECEIVING ) )
{
ep->state = D_EP_IDLE;
if ( ep->xferCompleteCb )
{
callback = ep->xferCompleteCb;
ep->xferCompleteCb = NULL;
callback( USB_STATUS_OK, ep->xferred, ep->remaining );
}
USBDHAL_StartEp0Setup( dev );
}
else
{
device->callbacks->setupCmd(device->setup);
}
#else
ep = &device->ep[ 0 ];
switch ( ep->state )
{
case D_EP_IDLE:
ep->zlp = 0;
ep->remaining = 0;
callback = NULL;
status = USBDCH9_SetupCmd( device );
if ( status == USB_STATUS_REQ_ERR )
{
ep->in = true;
USBDHAL_StallEp( ep ); /* Stall Ep0 IN */
ep->in = false; /* OUT for next SETUP */
USBDHAL_StallEp( ep ); /* Stall Ep0 OUT */
USBDHAL_StartEp0Setup( dev ); /* Prepare for next SETUP packet*/
}
else /* ( Status == USB_STATUS_OK ) */
{
if ( (ep->state == D_EP_RECEIVING) || (ep->state == D_EP_TRANSMITTING) )
{
callback = ep->xferCompleteCb;
}
if ( ep->state != D_EP_RECEIVING )
{
if ( ep->remaining )
{
/* Data will be sent to host, check if a ZLP must be appended */
if ( ( ep->remaining < device->setup->wLength ) &&
( ep->remaining % ep->packetSize == 0 ) )
{
ep->zlp = 1;
}
}
else
{
/* No data stage, a ZLP may have been sent. If not, send one */
xferred = 0;
if ( ep->zlp == 0 )
{
ep->state = D_EP_IDLE;
USBD_Write( 0, NULL, 0, NULL ); /* ACK to host */
ep->state = D_EP0_IN_STATUS;
}
}
}
}
break;
case D_EP_RECEIVING:
if ( ep->remaining )
{
ep->in = false;
USBD_ReArmEp0( ep );
}
else
{
status = USB_STATUS_OK;
if ( callback != NULL )
{
status = callback( USB_STATUS_OK, ep->xferred, 0 );
callback = NULL;
}
if ( status != USB_STATUS_OK )
{
ep->in = true;
USBDHAL_StallEp( ep ); /* Stall Ep0 IN */
ep->in = false; /* OUT for next SETUP */
USBDHAL_StallEp( ep ); /* Stall Ep0 OUT */
USBDHAL_StartEp0Setup( dev ); /* Prepare for next SETUP pkt. */
ep->state = D_EP_IDLE;
}
else
{
USBDHAL_StartEp0Setup( dev ); /* Prepare for next SETUP packet*/
ep->state = D_EP_IDLE; /* USBD_Write() sets state back */
/* to EP_TRANSMITTING */
USBD_Write( 0, NULL, 0, NULL );
ep->state = D_EP0_IN_STATUS;
}
}
break;
case D_EP_TRANSMITTING:
if ( ep->remaining )
{
ep->in = true;
USBD_ReArmEp0( ep );
}
else
{
if ( ep->zlp == 1 )
{
xferred = ep->xferred;
ep->state = D_EP_IDLE; /* USBD_Write() sets state back */
/* to EP_TRANSMITTING */
USBD_Write( 0, NULL, 0, NULL ); /* Send ZLP */
ep->zlp = 2;
}
else
{
if ( ep->zlp == 0 )
{
xferred = ep->xferred;
}
ep->state = D_EP_IDLE;
USBD_Read( 0, NULL, 0, NULL ); /* Get ZLP packet (ACK) from host */
ep->state = D_EP0_OUT_STATUS;
}
}
break;
case D_EP0_IN_STATUS:
if ( ( USB->DOEP0CTL & USB_DOEP0CTL_EPENA ) == 0 )
{
/* Prepare for more SETUP Packets */
USBDHAL_StartEp0Setup( dev );
}
if ( callback != NULL )
{
callback( USB_STATUS_OK, xferred, 0 );
}
ep->state = D_EP_IDLE;
ep->in = false; /* OUT for next SETUP */
break;
case D_EP0_OUT_STATUS:
USBDHAL_StartEp0Setup( dev ); /* Prepare for more SETUP Packets */
if ( callback != NULL )
{
callback( USB_STATUS_OK, xferred, 0 );
}
ep->state = D_EP_IDLE;
ep->in = false; /* OUT for next SETUP */
break;
}
#endif /* __MBED__ */
}
void USBDEP_Ep0Handler( USBD_Device_TypeDef *device )
{
int status;
USBD_Ep_TypeDef *ep;
static bool statusIn;
static uint32_t xferred;
static USB_XferCompleteCb_TypeDef callback;
ep = &device->ep[ 0 ];
#ifdef __MBED__
(void)xferred;
(void)statusIn;
(void)status;
USB_PRINTF("USBDEP: ep0 %s, rem %ld, z %d\n", epStatusStr[ep->state], ep->remaining, ep->zlp);
if ( ( ep->state == D_EP_TRANSMITTING ) || ( ep->state == D_EP_RECEIVING ) )
{
ep->state = D_EP_IDLE;
if ( ep->xferCompleteCb )
{
callback = ep->xferCompleteCb;
ep->xferCompleteCb = NULL;
callback( USB_STATUS_OK, ep->xferred, ep->remaining );
}
USBDHAL_ReenableEp0Setup(device);
}
else
{
device->callbacks->setupCmd(device->setup);
}
#else /* not __MBED__ */
switch ( ep->state )
{
case D_EP_IDLE:
ep->remaining = 0;
ep->zlp = 0;
callback = NULL;
statusIn = false;
status = USBDCH9_SetupCmd( device );
if ( status == USB_STATUS_REQ_ERR )
{
ep->in = true;
USBDHAL_StallEp( ep ); /* Stall Ep0 IN */
ep->in = false; /* OUT for next SETUP */
USBDHAL_StallEp( ep ); /* Stall Ep0 OUT */
USBDHAL_ReenableEp0Setup( device ); /* Prepare for next SETUP packet*/
}
else /* ( Status == USB_STATUS_OK ) */
{
if ( (ep->state == D_EP_RECEIVING) || (ep->state == D_EP_TRANSMITTING) )
{
callback = ep->xferCompleteCb;
}
if ( ep->state != D_EP_RECEIVING )
{
if ( ep->remaining )
{
/* Data will be sent to host, check if a ZLP must be appended */
if ( ( ep->remaining < device->setup->wLength ) &&
( ep->remaining % ep->packetSize == 0 ) )
{
ep->zlp = 1;
}
}
else
{
/* Prepare for next SETUP packet*/
USBDHAL_ReenableEp0Setup( device );
/* No data stage, a ZLP may have been sent. If not, send one */
xferred = 0;
if ( ep->zlp == 0 )
{
USBD_Write( 0, NULL, 0, NULL ); /* ACK to host */
ep->state = D_EP0_IN_STATUS;
}
else
{
ep->state = D_EP_IDLE;
ep->in = false; /* OUT for next SETUP */
}
}
}
}
break;
case D_EP_RECEIVING:
if ( ep->remaining )
{
/* There is more data to receive */
USBD_ReArmEp0( ep );
}
else
{
status = USB_STATUS_OK;
if ( callback != NULL )
{
status = callback( USB_STATUS_OK, ep->xferred, 0 );
callback = NULL;
}
if ( status != USB_STATUS_OK )
{
ep->in = true;
USBDHAL_StallEp( ep ); /* Stall Ep0 IN */
ep->in = false; /* OUT for next SETUP */
USBDHAL_StallEp( ep ); /* Stall Ep0 OUT */
USBDHAL_ReenableEp0Setup( device ); /* Prepare for next SETUP pkt. */
ep->state = D_EP_IDLE;
}
else /* Everything OK, send a ZLP (ACK) to host */
{
USBDHAL_ReenableEp0Setup( device );/* Prepare for next SETUP packet*/
ep->state = D_EP_IDLE; /* USBD_Write() sets state back*/
/* to EP_TRANSMITTING */
USBD_Write( 0, NULL, 0, NULL );
ep->state = D_EP0_IN_STATUS;
}
}
break;
case D_EP_TRANSMITTING:
if ( ep->remaining )
{
/* There is more data to transmit */
USBD_ReArmEp0( ep );
}
else
{
/* All data transferred, is a ZLP packet needed ? */
if ( ep->zlp == 1 )
{
xferred = ep->xferred;
ep->state = D_EP_IDLE; /* USBD_Write() sets state back */
/* to EP_TRANSMITTING */
USBD_Write( 0, NULL, 0, NULL ); /* Send ZLP */
ep->zlp = 2;
}
else
{
if ( ep->zlp == 0 )
{
xferred = ep->xferred;
}
ep->state = D_EP_IDLE;
USBD_Read( 0, NULL, 0, NULL ); /* Get ZLP packet (ACK) from host */
statusIn = true;
ep->state = D_EP0_OUT_STATUS;
}
}
break;
case D_EP0_IN_STATUS:
case D_EP0_OUT_STATUS:
if ( statusIn )
{
USBDHAL_ReenableEp0Setup( device );
}
if ( callback != NULL )
{
callback( USB_STATUS_OK, xferred, 0 );
}
ep->state = D_EP_IDLE;
ep->in = false; /* OUT for next SETUP */
break;
default:
EFM_ASSERT( false );
break;
}
#endif /* __MBED__ */
}
/***************************************************************************//**
* @brief Handles Endpoint 0 transfer interrupt
******************************************************************************/
static void handleUsbEp0Int(void)
{
USB_SetIndex(0);
if (USB_Ep0SentStall() || USB_GetSetupEnd())
{
USB_Ep0ClearSentStall();
USB_ServicedSetupEnd();
myUsbDevice.ep0.state = D_EP_IDLE;
myUsbDevice.ep0.misc.c = 0;
}
if (USB_Ep0OutPacketReady())
{
if (myUsbDevice.ep0.misc.bits.waitForRead == true)
{
myUsbDevice.ep0.misc.bits.outPacketPending = true;
}
else if (myUsbDevice.ep0.state == D_EP_IDLE)
{
myUsbDevice.ep0String.c = USB_STRING_DESCRIPTOR_UTF16LE;
USB_ReadFIFOSetup();
// Vendor unique, Class or Standard setup commands override?
#if SLAB_USB_SETUP_CMD_CB
if (USBD_SetupCmdCb(&myUsbDevice.setup) == USB_STATUS_REQ_UNHANDLED)
{
#endif
if (myUsbDevice.setup.bmRequestType.Type == USB_SETUP_TYPE_STANDARD)
{
USBDCH9_SetupCmd();
}
else
{
SendEp0Stall();
}
#if SLAB_USB_SETUP_CMD_CB
}
else
{
// If in-packet but callback didn't setup a USBD_Read and we are expecting a data byte then
// we need to wait for the read to be setup and nack packets till USBD_Read is called.
if ((myUsbDevice.setup.bmRequestType.Direction == USB_SETUP_DIR_OUT)
&& (myUsbDevice.ep0.state != D_EP_RECEIVING)
&& (myUsbDevice.setup.wLength)
)
{
myUsbDevice.ep0.misc.bits.waitForRead = true;
}
}
#endif
}
else if (myUsbDevice.ep0.state == D_EP_RECEIVING)
{
handleUsbEp0Rx();
}
else
{
myUsbDevice.ep0.misc.bits.outPacketPending = true;
}
}
if ((myUsbDevice.ep0.state == D_EP_TRANSMITTING) && (USB_Ep0InPacketReady() == 0))
{
handleUsbEp0Tx();
}
}