usb.c

lm3s下lwip的udp

    //
    // Check the arguments.
    //
    ASSERT(ulBase == USB0_BASE);
    ASSERT((ulEndpoint == USB_EP_1) || (ulEndpoint == USB_EP_2) ||
           (ulEndpoint == USB_EP_3));

    //
    // Determine if a transmit or receive endpoint is being configured.
    //
    if(ulFlags & USB_EP_DEV_IN)
    {
        //
        // Set the maximum packet size.
        //
        HWREGB(ulBase + EP_OFFSET(ulEndpoint) + USB_O_TXMAXP1) =
            ulMaxPacketSize;

        //
        // The transmit control value is zero unless options are enabled.
        //
        ulRegister = 0;

        //
        // Allow auto setting of TxPktRdy when max packet size has been loaded
        // into the FIFO.
        //
        if(ulFlags & USB_EP_AUTO_SET)
        {
            ulRegister |= USB_TXCSRH1_AUTOSET;
        }

        //
        // Configure the DMA mode.
        //
        if(ulFlags & USB_EP_DMA_MODE_1)
        {
            ulRegister |= USB_TXCSRH1_DMAEN | USB_TXCSRH1_DMAMOD;
        }
        else if(ulFlags & USB_EP_DMA_MODE_0)
        {
            ulRegister |= USB_TXCSRH1_DMAEN;
        }

        //
        // Enable isochronous mode if requested.
        //
        if((ulFlags & USB_EP_MODE_MASK) == USB_EP_MODE_ISOC)
        {
            ulRegister |= USB_TXCSRH1_ISO;
        }

        //
        // Write the transmit control value.
        //
        HWREGB(ulBase + EP_OFFSET(ulEndpoint) + USB_O_TXCSRH1) =
            (unsigned char)ulRegister;

        //
        // Reset the Data toggle to zero.
        //
        HWREGB(ulBase + EP_OFFSET(ulEndpoint) + USB_O_TXCSRL1) =
            USB_TXCSRL1_CLRDT;
    }
    else
    {
        //
        // Set the MaxPacketSize.
        //
        HWREGB(ulBase + EP_OFFSET(ulEndpoint) + USB_O_RXMAXP1) =
            ulMaxPacketSize;

        //
        // The receive control value is zero unless options are enabled.
        //
        ulRegister = 0;

        //
        // Allow auto clearing of RxPktRdy when packet of size max packet
        // has been unloaded from the FIFO.
        //
        if(ulFlags & USB_EP_AUTO_CLEAR)
        {
            ulRegister = USB_RXCSRH1_AUTOCL;
        }

        //
        // Configure the DMA mode.
        //
        if(ulFlags & USB_EP_DMA_MODE_1)
        {
            ulRegister |= USB_RXCSRH1_DMAEN | USB_RXCSRH1_DMAMOD;
        }
        else if(ulFlags & USB_EP_DMA_MODE_0)
        {
            ulRegister |= USB_RXCSRH1_DMAEN;
        }

        //
        // Enable isochronous mode if requested.
        //
        if(USB_EP_MODE_ISOC & (ulFlags & USB_EP_MODE_MASK))
        {
            ulRegister |= USB_RXCSRH1_ISO;
        }

        //
        // Write the receive control value.
        //
        HWREGB(ulBase + EP_OFFSET(ulEndpoint) + USB_O_RXCSRH1) =
            (unsigned char)ulRegister;

        //
        // Reset the Data toggle to zero.
        //
        HWREGB(ulBase + EP_OFFSET(ulEndpoint) + USB_O_RXCSRL1) =
            USB_RXCSRL1_CLRDT;
    }
}

//*****************************************************************************
//
//! Gets the current configuration for an endpoint.
//!
//! \param ulBase specifies the USB module base address.
//! \param ulEndpoint is the endpoint to access.
//! \param pulMaxPacketSize is a pointer which will be written with the
//! maximum packet size for this endpoint.
//! \param pulFlags is a pointer which will be written with the current
//! endpoint settings. On entry to the function, this pointer must contain
//! either \b USB_EP_DEV_IN or \b USB_EP_DEV_OUT to indicate whether the IN or
//! OUT endpoint is to be queried.
//!
//! This function will return the basic configuration for an endpoint in device
//! mode. The values returned in \e *pulMaxPacketSize and \e *pulFlags are
//! equivalent to the \e ulMaxPacketSize and \e ulFlags previously passed to
//! USBDevEndpointConfig for this endpoint.
//!
//! \note This function should only be called in device mode.
//!
//! \return None.
//
//*****************************************************************************
void
USBDevEndpointConfigGet(unsigned long ulBase, unsigned long ulEndpoint,
                        unsigned long *pulMaxPacketSize,
                        unsigned long *pulFlags)
{
    unsigned long ulRegister;

    //
    // Check the arguments.
    //
    ASSERT(ulBase == USB0_BASE);
    ASSERT(pulMaxPacketSize && pulFlags);
    ASSERT((ulEndpoint == USB_EP_1) || (ulEndpoint == USB_EP_2) ||
           (ulEndpoint == USB_EP_3));

    //
    // Determine if a transmit or receive endpoint is being queried.
    //
    if(*pulFlags & USB_EP_DEV_IN)
    {
        //
        // Clear the flags other than the direction bit.
        //
        *pulFlags = USB_EP_DEV_IN;

        //
        // Get the maximum packet size.
        //
        *pulMaxPacketSize = (unsigned long)HWREGB(ulBase +
                                                  EP_OFFSET(ulEndpoint) +
                                                  USB_O_TXMAXP1);

        //
        // Get the current transmit control register value.
        //
        ulRegister = (unsigned long)HWREGB(ulBase + EP_OFFSET(ulEndpoint) +
                                           USB_O_TXCSRH1);

        //
        // Are we allowing auto setting of TxPktRdy when max packet size has
        // been loaded into the FIFO?
        //
        if(ulRegister & USB_TXCSRH1_AUTOSET)
        {
            *pulFlags |= USB_EP_AUTO_SET;
        }

        //
        // Get the DMA mode.
        //
        if(ulRegister & USB_TXCSRH1_DMAEN)
        {
            if(ulRegister & USB_TXCSRH1_DMAMOD)
            {
                *pulFlags |= USB_EP_DMA_MODE_1;
            }
            else
            {
                *pulFlags |= USB_EP_DMA_MODE_0;
            }
        }

        //
        // Are we in isochronous mode?
        //
        if(ulRegister & USB_TXCSRH1_ISO)
        {
            *pulFlags |= USB_EP_MODE_ISOC;
        }
        else
        {
            //
            // The hardware doesn't differentiate between bulk, interrupt
            // and control mode for the endpoint so we just set something
            // that isn't isochronous.  This ensures that anyone modifying
            // the returned flags in preparation for a call to
            // USBDevEndpointConfig will not see an unexpected mode change.
            // If they decode the returned mode, however, they may be in for
            // a surprise.
            //
            *pulFlags |= USB_EP_MODE_BULK;
        }
    }
    else
    {
        //
        // Clear the flags other than the direction bit.
        //
        *pulFlags = USB_EP_DEV_OUT;

        //
        // Get the MaxPacketSize.
        //
        *pulMaxPacketSize = (unsigned long)HWREGB(ulBase +
                                                  EP_OFFSET(ulEndpoint) +
                                                  USB_O_RXMAXP1);

        //
        // Get the current receive control register value.
        //
        ulRegister = (unsigned long)HWREGB(ulBase + EP_OFFSET(ulEndpoint) +
                                           USB_O_RXCSRH1);

        //
        // Are we allowing auto clearing of RxPktRdy when packet of size max
        // packet has been unloaded from the FIFO?
        //
        if(ulRegister & USB_RXCSRH1_AUTOCL)
        {
            *pulFlags |= USB_EP_AUTO_CLEAR;
        }

        //
        // Get the DMA mode.
        //
        if(ulRegister & USB_RXCSRH1_DMAEN)
        {
            if(ulRegister & USB_RXCSRH1_DMAMOD)
            {
                *pulFlags |= USB_EP_DMA_MODE_1;
            }
            else
            {
                *pulFlags |= USB_EP_DMA_MODE_0;
            }
        }

        //
        // Are we in isochronous mode?
        //
        if(ulRegister & USB_RXCSRH1_ISO)
        {
            *pulFlags |= USB_EP_MODE_ISOC;
        }
        else
        {
            //
            // The hardware doesn't differentiate between bulk, interrupt
            // and control mode for the endpoint so we just set something
            // that isn't isochronous.  This ensures that anyone modifying
            // the returned flags in preparation for a call to
            // USBDevEndpointConfig will not see an unexpected mode change.
            // If they decode the returned mode, however, they may be in for
            // a surprise.
            //
            *pulFlags |= USB_EP_MODE_BULK;
        }
    }
}

//*****************************************************************************
//
//! Sets the FIFO configuration for an endpoint.
//!
//! \param ulBase specifies the USB module base address.
//! \param ulEndpoint is the endpoint to access.
//! \param ulFIFOAddress is the starting address for the FIFO.
//! \param ulFIFOSize is the size of the FIFO in bytes.
//! \param ulFlags specifies what information to set in the FIFO configuration.
//!
//! This function will set the starting FIFO RAM address and size of the FIFO
//! for a given endpoint.  Endpoint zero does not have a dynamically
//! configurable FIFO so this function should not be called for endpoint zero.
//! The \e ulFIFOSize parameter should be one of the values in the
//! \b USB_FIFO_SZ_ values.  If the endpoint is going to use double buffering
//! it should use the values with the \b _DB at the end of the value.  For
//! example, use \b USB_FIFO_SZ_16_DB to configure an endpoint to have a 16
//! byte double buffered FIFO.  If a double buffered FIFO is used, then the
//! actual size of the FIFO will be twice the size indicated by the
//! \e ulFIFOSize parameter.  This means that the \b USB_FIFO_SZ_16_DB value
//! will use 32 bytes of the USB controller's FIFO memory.
//!
//! The \e ulFIFOAddress value should be a multiple of 8 bytes and directly
//! indicates the starting address in the USB controller's FIFO RAM.  For
//! example, a value of 64 indicates that the FIFO should start 64 bytes into
//! the USB controller's FIFO memory.  The \e ulFlags value specifies whether
//! the endpoint's OUT or IN FIFO should be configured.  If in host mode, use
//! \b USB_EP_HOST_OUT or \b USB_EP_HOST_IN, and if in device mode use
//! \b USB_EP_DEV_OUT or \b USB_EP_DEV_IN.
//!
//! \return None.
//
//*****************************************************************************
void
USBFIFOConfigSet(unsigned long ulBase, unsigned long ulEndpoint,
                 unsigned long ulFIFOAddress, unsigned long ulFIFOSize,
                 unsigned long ulFlags)
{
    //
    // Check the arguments.
    //
    ASSERT(ulBase == USB0_BASE);
    ASSERT((ulEndpoint == USB_EP_1) || (ulEndpoint == USB_EP_2) ||
           (ulEndpoint == USB_EP_3));

    //
    // See if the transmit or receive FIFO is being configured.
    //
    if(ulFlags & (USB_EP_HOST_OUT | USB_EP_DEV_IN))
    {
        //
        // Set the transmit FIFO location and size for this endpoint.
        //
        USBIndexWrite(ulBase, ulEndpoint >> 4, USB_O_TXFIFOSZ, ulFIFOSize, 1);
        USBIndexWrite(ulBase, ulEndpoint >> 4, USB_O_TXFIFOADD,
                      ulFIFOAddress >> 3, 2);
    }
    else
    {
        //
        // Set the receive FIFO location and size for this endpoint.
        //
        USBIndexWrite(ulBase, ulEndpoint >> 4, USB_O_RXFIFOSZ, ulFIFOSize, 1);
        USBIndexWrite(ulBase, ulEndpoint >> 4, USB_O_RXFIFOADD,
                      ulFIFOAddress >> 3, 2);
    }
}

//*****************************************************************************
//
//! Returns the FIFO configuration for an endpoint.
//!
//! \param ulBase specifies the USB module base address.
//! \param ulEndpoint is the endpoint to access.
//! \param pulFIFOAddress is the starting address for the FIFO.
//! \param pulFIFOSize is the size of the FIFO in bytes.
//! \param ulFlags specifies what information to retrieve from the FIFO
//! configuration.
//!
//! This function will return the starting address and size of the FIFO for a
//! given endpoint.  Endpoint zero does not have a dynamically configurable
//! FIFO so this function should not be called for endpoint zero.  The
//! \e ulFlags parameter specifies whether the endpoint's OUT or IN FIFO should
//! be read.  If in host mode, the \e ulFlags parameter should be
//! \b USB_EP_HOST_OUT or \b USB_EP_HOST_IN, and if in device mode the
//! \e ulFlags parameter should be either \b USB_EP_DEV_OUT or
//! \b USB_EP_DEV_IN.
//!
//! \return None.
//
//*****************************************************************************
void
USBFIFOConfigGet(unsigned long ulBase, unsigned long ulEndpoint,