RE: Finding Hardware Interrupt Number

Well looks like all is not working as expected. I checked the hardware
and see the interrupts trigger on Interrupt Pin 5 using an oscope
measuring the resistor connected to that pin. I fired 5 interrupts just
to be sure and can capture them on the oscopse how ever I don't see the
interrupts trigger in the kernel:

# cat /proc/interrupts           
 69:          0   MCP2515
 77:       7528   ColdFire UART     
Starting
 78:          0   ColdFire UART
d.en
.
.
.
.

Interrupt 69 did not trigger as shown above. I assumed that the all the
interrupt sources should be enabled in the uClinux kernel, is this
correct to assume? Or do I need to modify the kernel to enable disable
the interrupt thru the interrupt mask register? Does any one know where
this needs to be done, or if it needs to be done?

Thanks,

Fahd Abidi


-----Original Message-----
From: [email protected] [mailto:[email protected]]
On Behalf Of Fahd Abidi
Sent: Wednesday, June 11, 2008 1:01 PM
To: Fahd Abidi
Subject: RE: [ColdFire] Finding Hardware Interrupt Number

Looking at include/asm-m68knommu/m527xsim.h the ICR base is set to 0x40.
And since I am using IRQ pin 5 this would mean that interrupt vector
would be 0x45? I think. Which is 69, this matched what Marc has
mentioned and also seems to match your IRQ offsets, so I mmight have it.
I'm still new to this and learning.

Thanks for all the help!

Fahd Abidi

-----Original Message-----
From: [email protected] [mailto:[email protected]]
On Behalf Of Allon Stern
Sent: Wednesday, June 11, 2008 12:01 PM
To: Fahd Abidi
Subject: Re: [ColdFire] Finding Hardware Interrupt Number


On Jun 11, 2008, at 11:34 AM, Allon Stern wrote:

> In my linux environment (2.6), the interrupt# was IH_GPIO_BASE+4 (for 
> IRQ pin 4)

Whoops, that was on the OMAP. Dang #ifdefs!

On the Coldfire, it was 64+7 for IRQ pin 7.  Sorry for any confusion.

-
allon
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