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Altera_Forum's avatar
Altera_Forum
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15 years ago

Unconnected interrupts with SOPC Builder

Hello people, I created a sopc system with a PCIe core, a dma controller and memory. I want the dma controller to send an interrupt when a dma transfer ends. The dma's interrupt sender por...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

The interrupts are coming through now. I had to set the AVL_IRQ bit in the Avalon-MM to PCI Express Interrupt Enable Register at address: 0x0050.

Eg.

iowrite32((u32)1<<7, (u32*)(ape->bar[0]+PCIE_CONTROL_REGISTER_OFFSET+0x0050));

This is different from the altpciechdma driver that was in the linux kernel. If you want to use it for your own, add the above line after the map_bars() function in the probe() function and it will work properly.

Regards,

Frederik