gpio interrupt is not invoked on Panda board

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List,

I try to get gpio_191 ping interrupted on panda but never succeeded. What I do is

1. set 0x410b on dpm_emu19 register to enable interrupt and wakeup 
   on gpio_191
2. set bit 31 to 1 on GPIO_IRQSTATUS_SET_0 register at 0x4805d034
3. set bit 31 to 1 on GPIO_IRQWAKEN_0 register at 0x4805d044
4. set bit 31 to 0 on GPIO_OE register at 0x4805d134 (output)
5. set bit 31 to 1 on GPIO_SETDATAOUT register at 0x4805d194

Then I expect I should see interrupt on GPIO_IRQSTATUS_0 register at 0x4805d02c. But nothing happens for both output and input (put pin on ground or 1,8v).

Would you please give me hint what I miss here to get interrupt happened?
I want to use gpio_191 for IR receiver.

Thanks.

---henry
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