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In the Jungo Windriver manual I saw this paragraph:
"
note: for level-sensitive interrupts, such as pci/compactpci interrupts, you must use driverwizard to define the interrupts status register and assign the read / write command (s) for acknowledging (clearing) the interrupt, before attempting to listen to the interrupts with the wizard, otherwise the os may hang! the specific interrupt-acknowledgment information is hardware-specific "
In the manual I often see expressions related to device interrupts - that they are hardware specific.
1) Where can I get more info on interrupts on my board ? (
i have altera stratix ii gx pci-express development kit, system - windows xp )
2) How can I get info on DMA control registers, those which must be programmed - to start DMA transfer ? Where can I get address of this register ?
3) In my design DMA starts only when I press on-board button. How to force this DMA start from application without using buttons ?
Please, help, I'm totally stuck with this project.
Thanks in advance.
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1) You can use an LED to indicate an MSI is sending(i.e., app_msi_ack is asserted)
2)I don't know whether you are using the chainning DMA example. If is, read the code.
3)I don't get you. As far as I know, a DMA operation always starts by the software running on the OS writes the DMA regs to start the DMA state machine.
