cdcsetcontrollinestaterequest.c

AT91SAM9263的USB Device端口驱动

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/*
    Title: CDCSetControlLineStateRequest implementation

    About: Purpose
        Implementation of the CDCSetControlLineStateRequest class.
*/

//------------------------------------------------------------------------------
//         Headers
//------------------------------------------------------------------------------

#include "CDCSetControlLineStateRequest.h"

//------------------------------------------------------------------------------
//         Exported functions
//------------------------------------------------------------------------------
/*
    Function: CDCSetControlLineStateRequest_IsDtePresent
        Notifies if the given request indicates that the DTE signal is present.

    Parameters:
        request - Pointer to a USBGenericRequest instance.

    Returns:
        1 if the DTE signal is present, otherwise 0.
*/
unsigned char CDCSetControlLineStateRequest_IsDtePresent(
    const USBGenericRequest *request)
{
    if ((USBGenericRequest_GetValue(request) & 0x0001) != 0) {

        return 1;
    }
    else {

        return 0;
    }
}

/*
    Function: CDCSetControlLineStateRequest_ActivateCarrier
        Notifies if the given request indicates that the device carrier should
        be activated.

    Parameters:
        request - Pointer to a USBGenericRequest instance.

    Returns:
        1 is the device should activate its carrier, 0 otherwise.
*/
unsigned char CDCSetControlLineStateRequest_ActivateCarrier(
    const USBGenericRequest *request)
{
    if ((USBGenericRequest_GetValue(request) & 0x0002) != 0) {

        return 1;
    }
    else {

        return 0;
    }
}