VNC2 参数 Datasheet PDF下载

Document No.: FT_000138

VINCULUM-II EMBEDDED DUAL USB HOST CONTROLLER IC Datasheet

Version -

1.0

Clearance No.: FTDI#

143

8

Firmware

VNC2 firmware model has evolved considerably since VINC1L. For reasons of code maintainability,

performance, stability and ease of use from the point of view of the customer, VNC2 has a modular

firmware model.

VNC2 firmware can be separated into 4 categories:

VNC2 real-time operating system (RTOS).

VNC2 device drivers.

User applications – Tool Chain.

Precompiled Firmware.

8.1 RTOS

The VNC2 RTOS (VOS) is a pre-emptive priority-based multi-tasking operating system. VOS has been

developed by FTDI and is available to customers for use in their own VNC2 based systems free of charge.

VOS is supplied as linkable object files.

A full explanation and how to use VOS is available in a separate application note which can be

downloaded from the

8.2 Device drivers

To facilitate communication between user applications and the VNC2 hardware peripherals FTDI provides

device drivers which operate with VOS. In addition to the hardware device drivers, FTDI provides

function drivers (available from the

which build upon the basic hardware device driver

functionality for a specific purpose. For example, drivers for standard USB device classes may be created

which build upon the USB host hardware driver to implement a BOMS class, CDC, printer class or even a

specific vendor class device driver.

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