How do I create an interrupt on the PCI-DIO-96 from an external signal connected to the lines PC0 or PC3 of a port?

[SvenJung]

Hi everybody,

we are currently using the PCI-DIO-96 for data acquisition from an old AT-DIO-32F card. All PPIs and ports work in mode 0 (standard input/output). The manual mentions the possibility to create an interrupt from an external signal connected to the lines PC0 and PC3 of port C from a PPI. To get the interrupt I have connected my interrupt service routine to the PCI-DIO-96, enabled the master interrupt enable bit in the interrupt configuration register 2 and enabled interrupt enable bits of every PPI chip in the interrupt configuration register 1. The interrupt should be generated if a signal low-to-high transition occurs on th
e lines PC0 or PC3 of a PPI. We've simulated the signal low-to-high transition with an external voltage source connected to the line PC0. We actually saw in the memory that the line toggled from state low to state high, but no interrupt was generated. I don't have a guess what I am doing wrong. Perhaps anybody knows the solution of this problems.

Thanks and best regards.

Sven Jungnickel

[Erin_B.]

You may want to try disabling your USB or IEEE-1394 host controller. It's possible that one of these devices could be on the same interrupt as you DIO-96 and causing the interrupt to not be serviced.

Regards,
Erin