PCI9054中断问题

由FPGA给9054提供LINT信号，如果想进入中断处理程序，是不是应该先在驱动中的startdevice例程中设置开启中断。即m_BAR1.outd(0x68,0x0f001D00);
只有这样本地中断才可能引起驱动程序进入中断处理程序啊？下面是我的代码
LINT应该持续大概多少时间呢？
谢谢各位帮忙。

NTSTATUS PhadriverDevice::OnStartDevice(KIrp I)
{
    t << "Entering PhadriverDevice::OnStartDevice\n";

    NTSTATUS status = STATUS_SUCCESS;

    I.Information() = 0;

    // The default Pnp policy has already cleared the IRP with the lower device
    // Initialize the physical device object.

    // Get the list of raw resources from the IRP
    PCM_RESOURCE_LIST pResListRaw = I.AllocatedResources();
    // Get the list of translated resources from the IRP
    PCM_RESOURCE_LIST pResListTranslated = I.TranslatedResources();

    // Create an instance of KPciConfiguration so we can map Base Address
    // Register indicies to ordinals for memory or I/O port ranges.
    KPciConfiguration PciConfig(m_Lower.TopOfStack());

    // For each memory mapped region, initialize the memory mapped range
    // using the resources provided by NT. Once initialized, each memory
    // range's base virtual address in system space can be obtained by calling
    // member Base(). Each memory range's physical address in CPU space can
    // obtained by calling CpuPhysicalAddress(). To access the memory mapped
    // range use member functions such as inb/outb, or the array element operator.
    status = m_MemoryRange0.Initialize(
        pResListTranslated,
        pResListRaw,
        PciConfig.BaseAddressIndexToOrdinal(0)
        );
    if (!NT_SUCCESS(status))
    {
        Invalidate();
        return status;        
    }


    // For each I/O port mapped region, initialize the I/O port range using
    // the resources provided by NT. Once initialized, use member functions such as
    // inb/outb, or the array element operator to access the ports range.
    status = m_IoPortRange0.Initialize(
        pResListTranslated,
        pResListRaw,
        PciConfig.BaseAddressIndexToOrdinal(1)
        );
    if (!NT_SUCCESS(status))
    {
        Invalidate();
        return status;        
    }

    status = m_IoPortRange1.Initialize(
        pResListTranslated,
        pResListRaw,
        PciConfig.BaseAddressIndexToOrdinal(3)
        );
    if (!NT_SUCCESS(status))
    {
        Invalidate();
        return status;        
    }

    // Initialize and connect the interrupt
    status = m_Irq.InitializeAndConnect(
        pResListTranslated,
        LinkTo(Isr_Irq),
        this
        );
    if (!NT_SUCCESS(status))
    {
        Invalidate();
        return status;        
    }

    // Setup the DPC to be used for interrupt processing
    m_DpcFor_Irq.Setup(LinkTo(DpcFor_Irq), this);

// TODO:    Add device-specific code to start your device.

    // The base class will handle completion

    m_PHAData=new(NonPagedPool)ULONG[256];//申名非分页缓冲区
    
    t << "Entering PhasampleDevice::dingyi\n";
    for(ULONG i=0;i<256;i++)
    {
    m_PHAData=0;//初始为0  
    }

    j=0;
    
        m_StartFlag=false;//一开始start信号是没有开始的。

    //驱动加载的时候先关中断。
    m_IoPortRange0.outd(INTCSR,0x0f000000);

    return status;
}

NTSTATUS PhadriverDevice::PHADRIVER_IOCTL_start_Handler(KIrp I)
{
    NTSTATUS status = STATUS_SUCCESS;

    t << "Entering PhadriverDevice::PHADRIVER_IOCTL_start_Handler, " << I << EOL;
// TODO:    Verify that the input parameters are correct
//            If not, return STATUS_INVALID_PARAMETER

// TODO:    Handle the the PHADRIVER_IOCTL_start request, or
//            defer the processing of the IRP (i.e. by queuing) and set
//            status to STATUS_PENDING.

// TODO:    Assuming that the request was handled here. Set I.Information
//            to indicate how much data to copy back to the user.
    m_StartFlag=true;

    m_IoPortRange0.outd(INTCSR,0x0f001D00);//开启中断


    I.Information() = 0;
    return status;
}

NTSTATUS PhadriverDevice::PHADRIVER_IOCTL_read_Handler(KIrp I)
{
    NTSTATUS status = STATUS_SUCCESS;

    t << "Entering PhadriverDevice::PHADRIVER_IOCTL_read_Handler, " << I << EOL;
// TODO:    Verify that the input parameters are correct
//            If not, return STATUS_INVALID_PARAMETER

// TODO:    Handle the the PHADRIVER_IOCTL_read request, or
//            defer the processing of the IRP (i.e. by queuing) and set
//            status to STATUS_PENDING.

// TODO:    Assuming that the request was handled here. Set I.Information
//            to indicate how much data to copy back to the user.

    memcpy(I.IoctlBuffer(),m_PHAData,256*sizeof(ULONG));
    I.Information() = 256*sizeof(ULONG);

    return status;
}

BOOLEAN PhadriverDevice::Isr_Irq(void)
{
// TODO:    Verify that the interrupt was caused by our device.
//            Replace "TRUE" in next line with actual test.

    zhongduan=m_IoPortRange0.ind(INTCSR);//读取中断寄存器的状态
    
    if((zhongduan&0x8000)==0)
    {
        return FALSE;
    }
    else
    {
        if (m_StartFlag) //表示在开始采集的状态
        {
            m_IoPortRange0.outd(INTCSR,0x0f000000);
            j++;
            j = j%256;
            ULONG  temp;
            temp = m_IoPortRange1.ind(0);
            if(m_PHAData!=NULL)
            {
                m_PHAData[j] = temp;
            }
            m_IoPortRange0.outd(INTCSR,0x0f001D00);
        }
        
    }

        
        // Return FALSE to indicate that this device did not cause the interrupt.
        
        

// TODO:    Service the device.
//            Minimal processing may be done here in the ISR, but
//            most processing should be deferred to a DPC.
//            Generally, you should:
//                o  stop the device from generating interrupts
//                o  perform any additional time-critical functions
//                o  schedule a DPC to perform the bulk of the work.    
//

    // Request deferred procedure call
    // The arguments to Request may be any values that you choose
    //if (!m_DpcFor_Irq.Request(NULL, NULL))
    //{
// TODO:    Request is already in the queue
//            You may want to set flags or perform
//            other actions in this case
    //}

    // Return TRUE to indicate that our device caused the interrupt
    return TRUE;


}