Interruptions GPIO on LM3S8962
Hello. In collaboration with ARM LV 2009 & LM3S8962.
I use pins PB4 GPIOB and PB6 as sources of interrupt on falling edge. Handler interruption VI created correctly, everything works well, interrupts are triggered correctly. However, I'm trying to understand how to determine the origin of the interruption - PB4 or PB6? Simply by reading the node associated with each spindle EIO won't work, because PB4 both PB6 could be logic 0 to the downtime, but only one of them has generated the interrupt. Been put apart using an inline C node, have other options?
Thanks for your help!
Paul
And here I'm answering my own question.
In the default VI interrupt handler that creates LV, there is an entry named "Param". Documentation of DIDN'T say this entry is not used. FAKE! This entry will provide the value of the status register of the interruption for the interruption that is handled. Somewhat similar to GPIOPinIntStatus (unsigned long ulPort, tBoolean bMasked) for an interruption of GPIO port.
So, in my case described above, I get param = 16 for PB4, param = 32 for PB5 and param = 64 for PB6. Sovled
ToNI Note: I think this should be stated in the documentation, because this feature left unexplained seriously disables the use of interrupts.
Tags: NI Products
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