ISR not being invoked though the interrupt is occuring

NTDEV
1

Hi ,

I have just started writing device drivers … and have started of with
wrting an external Loop back driver for Serial port.

Well all is working fine except , that my ISR is not getting invoked.

i have registered for the Data Recieved/Available interrupt.

Then i write to the serial port, and due to the external shorting of Pin2
and Pin3 the data is received on the read pin, which should trigger the
Interrupt.

Now the Interrupt is getting triggered(i can get it from the value of the
IIR) but my ISR is not invoked.

Also i am not able to Assign Resources to my Driver.

Thanks

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2

Serial port resource is not sharable… To make use of serial port, need to
claim resources (address space and irq)… Try to check any other driver
might have already claimed Serial port resource… Possibly System serial
port driver… If so try to disable it and try your driver…

Hi ,

> I have just started writing device drivers … and have started of with
> wrting an external Loop back driver for Serial port.
>
> Well all is working fine except , that my ISR is not getting invoked.
>
> i have registered for the Data Recieved/Available interrupt.
>
> Then i write to the serial port, and due to the external shorting of
Pin2
> and Pin3 the data is received on the read pin, which should trigger the
> Interrupt.
>
> Now the Interrupt is getting triggered(i can get it from the value of
the
> IIR) but my ISR is not invoked.
>
> Also i am not able to Assign Resources to my Driver.
>
>
Thanks

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