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Altera_Forum
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12 years ago

uclinux PIO device driver interrupt handler not execute

Hi, Thanks in advance for any help I can get. I have a NIOS2 w/MMU running uClinux v3.7. It's a DE2-115 development kit with Cyclone IV FPGA. I use the PIO megafunction to monitor input rising ...
Altera_Forum's avatar
Altera_Forum
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12 years ago

Hi,

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You have mentioned there is a formal way to set and reset the ienable and status register without implementing directly into the control registers. Which function call are you referring to?

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Please refer the file 'linux-*.*/include/linux/irqflags.h'. For example, 'local_irq_disable()' reset the PIE bit.

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Do I have to clear the "edge_capture" register in the interrupt handler function?

*(ALTERA_BASE_ADDRESS + 0x03) = 0x00

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Please refer the data sheet of Altera's PIO core. How can you de-assert the interrupt signal for NiosII cpu ? In general, NiosII uses level triggered interruption.

Kazu