CYPRESS USB FX2 DRIVER

Devices that also have off-chip memory use the two stage loader mode. A company called AnchorChips now owned by Cypress came out with an innovative and useful product a while ago: For end user scenarios, it hooks up easily to hotplug utilities. One suitable loader is available from Cypress. There’s a project working on HID firmware: The usbstress software http:

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EZ USB on Linux

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. For end user scenarios, it hooks up easily to hotplug utilities.

A number of them need to download firmware before they are usable. 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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Cypress EZ-USB FX2 (CY7C68XXX)

Someone could usefully write a Free Software version. Their Linux support builds on the common kernel and user mode USB infrastructure, which you can read about elsewhere on this site.

That means computers need to download firmware to such devices before they’re used. Plus, it’s easier to distribute updated firmware if you don’t need to upgrade a kernel driver to do that.

A company called Cpress now owned by Cypress came out with an innovative and useful product a while ago: Kernel device drivers can do the downloads, but then the firmware just locks down kernel memory.

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

Cypress EZ-USB FX2 (CY7C68XXX)

USB devices typically have to work with many operating systems. Firmware source is available. 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: When supported directly by the Linux kernel, these devices cypresx just like any other kind of serial port.

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One suitable loader is available from Cypress.

Device firmware just processes interrupts, fills buffers, cypdess tells the hardware to do its thing. At this writing, all that firmware is statically linked into the appropriate mini-driver. It can support all USB endpoints 30 plus control.

This web page is designed as a community resource, with cross links to related projects as well as hosting ysb Linux-focused efforts directly. The usbstress software http: Devices that also have off-chip memory use the two stage loader mode.

This software is still usable on 2. For in-the-field product updates, or for developers, you can use a specialized second stage loader to write the boot EEPROMs.