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 How to read interrupt on GPIO 17 (PC104_IRQ)		  Forum Locked
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rstancil2000

2 Posts
Posted - 03 Jun 2010 :  18:34:39  Show Profile
I have a TITAN board with Win CE 5.0. I have added a PC104 board. I have an interrupt (IRQ10) set to go off when the board needs data. I can read the address and see the value and figure out which IRQ has occurred. But I can not figure out how to get the interrupt. If I use InitializeInterrupt, what do I put in for the IRQ value? Any help would be appreciated.

rstancil2000

2 Posts
Posted - 08 Jun 2010 :  10:35:33  Show Profile
I was able to read the interrupt. I used the value for SYSINTR_IRQ10 in the oalintr.h file and then used the command InterruptInitialize(SYSINT_IRQ10,event,NULL,0) to define the interrupt. Then wait for the interrupt with WaitForSingleObject(event,INFINITE). Then once the interrupt occurs, clear it with InterruptDone(SYSINTR_IRQ10).
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Russ-Eurotech

273 Posts
Posted - 08 Jun 2010 :  13:47:55  Show Profile  Email Poster
Thank you for posting that reply.

Here is the header file referenced:
http://files.eurotech-inc.com/Titan/oalintr.h

Note:
(SYSINTR_IRQ3 is PC104 IRQ 3, etc.)

SYSINTR_FIRMWARE is defined as 16


Here also is an example which uses the PXA270 timer to generate an interrupt, (IRQClock.zip)
http://files.eurotech-inc.com/Titan/IRQClock.zip

The method is the same regardless of the source of the interrupt,
so this would work for IO boards as well.
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