The following can be used as a guide to help calculate the required bootpartition size for a design:īoot partition size = loader size + maximum size of factory image + maxi-mum size of upgrade images + padding to sector boundaries Where the size passed using the -boot-partition-size n argument specifiesin bytes the minimum size required to store the boot loader, factory imageand any upgrade images. Xflash -boot-partition-size 0x30000 -factory usb_audio.xe Use the XMOS Development Tools to run the command: The DFU device interface is enabled by default in the XMOS USB Audio framework(see devicedefines.h), and explicitly enabled in each reference design by thefollowing line included in the customdefines.h file of each application: Installing the factory image to the deviceĢ.1 Installing the factory image to the device The DFU device on Windows requires the Theyscon USB Audio 2.0 Windows driverversion 1.13.3 or later.Ģ Creating factory and upgrade images with XFLASH You must use XMOS Development Tools version 10.4.1 (or later). The firmware upgrade for XMOS USB devices implementation uses the USB standardDFU device class mechanism and is based on the following specification:Īutomatic reboot of device on firmware upgrade To work correctlyyour development board must contain the latest DFU enabled firmware. The DFU loader is a flash device firmware upgrade mechanism. 84.4 Reverting firmware to factory image. 84.3 Uploading existing firmware from the device. 7Ĥ Using the DFU loader - OS X (via the XMOS DFU loader) 84.1 Set up the image loader. 73.4 Reverting firmware to factory image. 63.3 Uploading existing firmware from the device. 5ģ Using the DFU loader - Windows (via the Thesycon driver) 63.1 Set up the image loader. But right now I've stopped this effort.ĭetermining device status: state = appIDLE, status = 0ĭevice really in Runtime Mode, send DFU detach request.DFU loader for XMOS USB AUDIO devices 2/10Ģ Creating factory and upgrade images with XFLASH 42.1 Installing the factory image to the device. I may look into this error further in the future as I would like dfu-util to work with xmos. Since xmos provide a very simple dfu tool (open source), I've been using this up until now.

However something goes wrong anyway, see below.

Now dfu-util attempts to download the image.

In my firmware, I removed the second redundant configuration. Of course some 'observant developers' may remove the second redundant configuration. So yes, I would expect audio devices on the market with issue. I believe xmos has been rather successful with their audio sw framework. I found this thread with response from xmos developers.

Xmos dfu windows 10