CYPRESS USB FX2 DRIVER

Plugging EZ-USB devices into a Linux system runs device-specific scripts, which can download the appropriate firmware hexfile. Plus, it’s easier to distribute updated firmware if you don’t need to upgrade a kernel driver to do that. Someone could usefully write a Free Software version. You could run simple tests that transferred control, bulk, or isochronous traffic. The FX2 doesn’t support quite as many endpoints six plus control , but it does handle multibuffered high speed transfers in hardware.

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That means computers need to download firmware to such devices before they’re used.

For end user scenarios, it hooks up easily to hotplug utilities. USB devices typically have to work with many operating systems.

This web page is designed as a community resource, with cross links to related projects as well as hosting some Linux-focused efforts directly. Kernel device drivers can do the downloads, but then the firmware just locks down kernel memory. The usbstress software http: A company called AnchorChips now owned by Cypress came out with an innovative and useful product a while ago: Firmware source is available. cypess

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Cypress EZ-USB FX2 – LinuxTVWiki

When supported directly by the Linux kernel, these devices appear just like any other kind of serial port. A number of them need to download firmware before they are usable. The FX2 doesn’t support quite as many endpoints six plus controlbut it does handle multibuffered high speed transfers in hardware. There’s a project working on HID firmware: You could run simple tests that transferred control, bulk, or isochronous traffic.

The Linux system will typically be much more powerful, since it has at least a bit processor and richer software environment. Devices that also have off-chip memory use the two stage loader mode. It can support all USB endpoints 30 plus control.

At this writing, all that firmware is statically linked into the appropriate mini-driver. This software is still usable on 2.

EZ USB on Linux

Plus, it’s easier to distribute updated firmware if you don’t need to upgrade a kernel driver to do that. Someone could usefully write a Free Software version.

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Plugging EZ-USB devices into a Linux system runs device-specific scripts, which can cypeess the appropriate firmware hexfile.

One suitable loader cyprexs available from Cypress. Their Linux support builds on the common kernel and user mode USB infrastructure, which you can read about elsewhere on this site.

For in-the-field product updates, or for developers, you can use a specialized second stage loader to write the boot EEPROMs. Martin Diehl has provided EZ-USB firmware implementing simple device protocols that are very useful when used with usbtest software from Linux-USB hosts, to help verify correct operation of the host and isolate bugs. Device firmware just processes interrupts, fills buffers, and tells the hardware to do its thing.