device enumeration


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device enumeration

Identifying all the devices attached to a system and initializing the required routines (drivers) that enable them to function. See enumerate.
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With two CPUs involved in the setup, there are conflicts with clocking, addressing, and device enumeration. Using a PCIe NTB ensures that the clocking, addressing, and device enumeration are aligned between the two instruments.
Firmware is usually divided into three layers: a USB Function layer, implementing device functionality; the Logical Device layer, handling standard USB requests and low-speed data transfers, plus device enumeration and power management; and the Bus Interface layer that provides the interface between the USB Logical Device and the hardware.
The system stack manages the USB host operations including protocol management, device enumeration, transaction scheduling and status handling.

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