board.c

AT91SAM9261的USB设备驱动程序

//------------------------------------------------------------------------------
//      Includes
//------------------------------------------------------------------------------

#include "common.h"
#include "device.h"
#include "board.h"

//------------------------------------------------------------------------------
// \brief   Indicates the state of the VBus power line associated with the
//          specified interface.
// \param   pInterface Pointer to an USB controller interface
// \return  true if VBus is detected, false otherwise
//------------------------------------------------------------------------------
bool BRD_IsVBusConnected(void *pInterface)
{
#ifdef USB_BUS_POWERED
    return true;
#else
    if (ISSET(AT91F_PIO_GetInput(AT91C_PIO_VBUS), AT91C_VBUS)) {

        return true;
    }
    else {

        return false;
    }
#endif
}

//------------------------------------------------------------------------------
// \brief   Enables the external pull-up on D+ associated with the specified
//          USB controller
// \param   pInterface Pointer to an USB controller interface
//------------------------------------------------------------------------------
void BRD_ConnectPullUp(void *pInterface)
{
#if defined(AT91SAM7SEK) || (defined(AT91SAM7A3EK) && (REVISION == REV_B))
    AT91F_PIO_ClearOutput(AT91C_PIO_PULLUP, AT91C_PULLUP);

#elif (defined(AT91SAM7A3EK) && (REVISION == REV_A)) || defined(AT91RM9200)
    AT91F_PIO_SetOutput(AT91C_PIO_PULLUP, AT91C_PULLUP);
#endif
}

//------------------------------------------------------------------------------
// \brief   Disables the external pull-up on D+ associated with the specified
//          USB controller
// \param   pInterface Pointer to an USB controller interface
//------------------------------------------------------------------------------
void BRD_DisconnectPullUp(void *pInterface)
{
#if defined(AT91SAM7SEK) || (defined(AT91SAM7A3EK) && (REVISION == REV_B))
    AT91F_PIO_SetOutput(AT91C_PIO_PULLUP, AT91C_PULLUP);

#elif (defined(AT91SAM7A3EK) && (REVISION == REV_A)) || defined(AT91RM9200)
    AT91F_PIO_ClearOutput(AT91C_PIO_PULLUP, AT91C_PULLUP);
#endif
}

//------------------------------------------------------------------------------
// \brief   Indicates the state of the external pull-up associated with the
//          specified interface.
// \param   pInterface Pointer to an USB controller interface
// \return  true if the pull-up is currently connected, false otherwise.
//------------------------------------------------------------------------------
bool BRD_IsPullUpConnected(void *pInterface)
{
#if defined(AT91SAM7SEK) || (defined(AT91SAM7A3EK) && (REVISION == REV_B))
    if (ISSET(AT91F_PIO_GetInput(AT91C_PIO_PULLUP), AT91C_PULLUP)) {
#elif (defined(AT91SAM7A3EK) && (REVISION == REV_A)) || defined(AT91RM9200)

    if (!ISSET(AT91F_PIO_GetInput(AT91C_PIO_PULLUP), AT91C_PULLUP)) {
#else
    if (false) {
#endif
        return false;
    }
    else {

        return true;
    }
}

//------------------------------------------------------------------------------
// \brief   Configures the external pull-up on the D+ line associated with
//          the specified USB controller.
// \param   pInterface Pointer to the USB controller interface
//------------------------------------------------------------------------------
void BRD_ConfigurePullUp(void *pInterface)
{
#if defined(AT91SAM7SEK) || defined(AT91SAM7A3EK) || defined(AT91RM9200)
    AT91F_PMC_EnablePeriphClock(AT91C_BASE_PMC, 1 << AT91C_ID_PULLUP);
    AT91F_PIO_CfgOutput(AT91C_PIO_PULLUP, AT91C_PULLUP);
#endif
}

//------------------------------------------------------------------------------
// \brief   Configures the VBus monitoring PIO associated with the specified
//          USB controller.
// \param   pInterface Pointer to the USB controller interface
//------------------------------------------------------------------------------
void BRD_ConfigureVBus(void *pInterface)
{
#if !defined(USB_BUS_POWERED)
    AT91F_PMC_EnablePeriphClock(AT91C_BASE_PMC, 1 << AT91C_ID_VBUS);
    AT91F_PIO_CfgPullup(AT91C_PIO_VBUS, ~AT91C_VBUS);
    AT91F_PIO_CfgInput(AT91C_PIO_VBUS, AT91C_VBUS);
#endif
}