USB ILA Backhaul

This module provides the interface for consuming data from the USB device provided by the USB ILA.

class torii_ila.usb.USBIntegratedLogicAnalyzerBackhaul(ila, delay=3)

USB-based ILA backhaul interface, used in combination with USBIntegratedLogicAnalyzer to automatically set up a communications channel to get ILA samples off-device.

An instance of this class is typically created by calling USBIntegratedLogicAnalyzer.get_backhaul() which lets the ILA configure the backhaul as needed.

Alternatively you can pass the USBIntegratedLogicAnalyzer instance from the gateware to the constructor of this module.

This backhaul interface works by sending a request to the bulk endpoint BULK_EP_NUM that is provided by the ILA backend for the USB device with the VID/PID also specified by the ILA.

See torii_ila.backhaul.ILABackhaulInterface for public API.

Parameters:

  • ila (USBIntegratedLogicAnalyzer) – The ILA being used.

  • delay (int) – The number of second to delay the attempt to connect to the USB device, to allow for enumeration.