EZUSB CYPRESS DRIVER

One suitable loader is available from Cypress. The usbstress software http: This web page is designed as a community resource, with cross links to related projects as well as hosting some Linux-focused efforts directly. The FX2 doesn’t support quite as many endpoints six plus control , but it does handle multibuffered high speed transfers in hardware. The Linux system will typically be much more powerful, since it has at least a bit processor and richer software environment.

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Firmware source is available.

This software is still usable on 2. Their Linux support builds on the common kernel and user mode USB cypresz, 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.

Plugging EZ-USB devices into a Linux system runs device-specific scripts, which can download the appropriate firmware hexfile. One suitable loader is available from Cypress. For end user scenarios, it hooks up easily to hotplug utilities.

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Cypress EZ-USB FX2 (CY7C68XXX)

A company called AnchorChips now owned by Cypress came out with an innovative and useful product a while ago: It can support all USB endpoints 30 plus control. When supported directly by the Linux kernel, these devices appear just like any other kind of serial port.

That means computers need to download firmware to such devices before they’re used. Devices that also have off-chip memory use the two stage loader mode.

You could run simple tests that transferred control, bulk, or isochronous traffic. There’s a project working on HID firmware: Someone could usefully write a Free Software version. The FX2 doesn’t support quite as many endpoints six plus controlbut it does handle multibuffered high speed transfers in hardware.

wzusb

Cypress EZ-USB FX2 (CY7C68XXX)

This web page is designed as a community resource, with cross links to related projects as well as hosting some Linux-focused efforts directly. The Linux system will typically be much more powerful, since it has at least a bit processor and richer software environment.

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Kernel device drivers can do the downloads, but then the firmware just locks down kernel memory. Plus, it’s easier to distribute updated firmware if you don’t need to upgrade a kernel driver to do that.

A number of them need to download firmware before they are usable. The usbstress software http: 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.

At this writing, all that firmware is statically ezus into the appropriate mini-driver. USB devices typically have to work with many operating systems. Device firmware just processes interrupts, fills buffers, and tells the hardware to do its thing.