Re: [Xenomai-help] which way to obtain irq#

[Marcelo Coelho <mjcoelho@domain.hid>]

> [I think you swapped the terms "real" and "virtual" here, no?]

At a first look I don't think so. The first option gives a number 
between 1 and 255 and the second gives between 1 and 255.





Jan Kiszka wrote:
 > Marcelo Coelho wrote:
 >> Hi!
 >>
 >>
 >> I'm developing a driver based on RTDM, and i'm having some problems
 >> related to IRQ discovery (related to the fact that the driver is
 >> starting to do something).
 >>
 >> So, there is 2 ways to obtain the IRQ number:
 >>     pci_device -> irq
 >> or
 >>     pci_read_config_byte( pci_device, PCI_INTERRUPT_LINE, (unsigned
 >> char*) &irq )
 >>
 >>
 >> The difference between these is that the 1st presents the "real" irq
 >> number (between 1 and 15) and the other presents the "virtual" irq
 >> (between 1 and 255).
 >
 > [I think you swapped the terms "real" and "virtual" here, no?]
> You have to use the first one like any Linux driver (RTDM is no
> different in this regard).
> 
>>
>> From your experience, is there any problem using the virtual irq number
>> (the 1st option)?
>>
>>
>>
>> Thanks for your answers!!
>>
>>
> 
> Jan
> 

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