CYPRESS USB FX2 DRIVER

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. There’s a project working on HID firmware: Devices that also have off-chip memory use the two stage loader mode. Plugging EZ-USB devices into a Linux system runs device-specific scripts, which can download the appropriate firmware hexfile. 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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This web page is designed as a community resource, with cross links to related projects as well as hosting cypress Linux-focused efforts directly. A number of them need to download firmware before they are usable. That means computers need to download firmware to such devices before they’re used.

Cypress EZ-USB FX2 – LinuxTVWiki

Their Linux support builds on the common kernel and user mode USB infrastructure, which you can read about elsewhere on this site. For end user scenarios, it hooks up easily to hotplug utilities.

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There’s a project working on HID firmware: This software is still usable on 2. One suitable loader is available from Cypress. When supported directly by the Linux kernel, these devices appear just like any other kind of serial port.

USB devices typically have to work with many operating systems. You could run simple tests that transferred control, bulk, or isochronous traffic. Device firmware just processes interrupts, fills buffers, and tells the hardware to do its thing. At this writing, all that firmware is statically linked into the appropriate mini-driver. The usbstress software cgpress The Linux system will typically be much more powerful, since it has at least a bit processor and richer software environment.

Cypress EZ-USB FX2 (CY7C68XXX)

It can support all USB endpoints 30 plus control. Devices that also have off-chip memory use the two stage loader mode.

Plugging EZ-USB devices into a Linux system runs device-specific scripts, which can download the appropriate firmware hexfile. A company called AnchorChips now owned by Cypress came out with an innovative and useful product a while ago: Kernel device cyprese can do the downloads, but then the firmware just locks down kernel memory.

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For in-the-field product updates, or for developers, you can use a specialized second stage loader to write the boot EEPROMs. Firmware source is available.

Cypress EZ-USB FX2 (CY7C68XXX)

The FX2 doesn’t support quite as many endpoints six plus controlbut it does handle multibuffered high speed transfers in hardware.

Plus, it’s easier to distribute updated firmware if you don’t need to upgrade a kernel driver to do that. 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.

Someone could usefully write a Free Software version.