pyPCIe: Simple Python Module to access PCIe Endpoint BARs

pyPCIe provides a quick way to read/write registers in PCIe Base Address Register (BAR) regions.

pyPCIe mmaps PCIe device BARs via the resourceX files in /sys/bus/pci/devices/[bus_id] for read/write and provides functions for 32 bit read/write requests.

Note: the resourceX files in sysfs are typically only accessible as root. The python scripts using pyPCIe might need to be run as root.

Example

from pypcie import Device

# Bind to PCI device at "0000:03:00.0"
d = Device("0000:03:00.0")
# Access BAR 0
bar = d.bar[0]

# write 0xdeadbeef to BAR 0, offset 0x1000
bar.write(0x1000, 0xdeadbeef)

# read BAR 0, offset 0x1004
ret = bar.read(0x1004)