Someone could usefully write a Free Software version. Firmware source is available. There’s a project working on HID firmware: Plugging EZ-USB devices into a Linux system runs device-specific scripts, which can download the appropriate firmware hexfile. You could run simple tests that transferred control, bulk, or isochronous traffic. A number of them need to download firmware before they are usable. One suitable loader is available from Cypress.
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This software is still usable on 2. Someone could usefully write a Free Software version. There’s a project working on HID firmware: A number of them need to download firmware before they are usable. Plugging EZ-USB devices into a Linux system runs device-specific scripts, which can download the appropriate firmware hexfile.
It can support all USB endpoints 30 plus control. You could run simple tests that transferred control, bulk, or isochronous traffic. A company called AnchorChips now owned by Cypress came out with an innovative and useful product a while ago: Martin Diehl has provided EZ-USB firmware implementing simple device protocols that are es-usb useful when used with usbtest software from Linux-USB hosts, to help verify correct operation of the host and isolate bugs.
The FX2 doesn’t support quite as many endpoints six plus controlbut it does handle multibuffered high speed transfers in hardware.
Cypress EZ-USB FX2 (CY7C68XXX)
Device firmware just processes interrupts, fills buffers, and tells the hardware to do its thing. One suitable loader is available from Cypress.
The usbstress software http: Plus, it’s easier to distribute updated firmware if you don’t need to upgrade a kernel driver to do that.
That means computers need to download firmware to such devices before they’re used.
Firmware source is available. Their Linux support builds on the common kernel and user mode USB infrastructure, which you can read about elsewhere on this site. When supported directly by the Linux kernel, these devices appear just like any other kind of serial port.
Kernel device drivers can do the downloads, but then the ez-uwb just locks down kernel memory. Devices that also have off-chip memory use the two stage loader mode.
EZ USB on Linux
The Linux system will typically be much more powerful, since it has at least a bit processor and richer software environment. For end user scenarios, it hooks up easily to hotplug utilities. For in-the-field product updates, or for developers, you can use a specialized second stage loader to write the boot EEPROMs.
At rx2 writing, all that firmware is statically linked into the appropriate mini-driver. This web page is designed as a community resource, with cross links to related projects as well as hosting some Linux-focused efforts directly. USB devices typically have to work with many operating systems.