October 2020 - dfu-util - lists.osmocom.org

Re: [Dfu-util] Forward of moderated message
by Tormod Volden 10 Nov '20

10 Nov '20

On Tue, Oct 27, 2020 at 8:13 PM Domenico wrote: > Is this the right repo? > > git://git.code.sf.net/p/dfu-util/dfu-util Hi Domenico, Yes, correct. It is also listed on the homepage http://dfu-util.sourceforge.net/ The latest commit hash is 5c323e45. > It seem that the -Z switch is ignored, no matter the value I specify > the data transferred from the device is 16384. > ID 0483:df11 > Run-time device DFU version 011a Thanks for testing! What is this device exactly? >From the above, your device seems to be a DfuSe device. In this case this is the expected behavior. I would recommend a DfuSe upload, specifying -s <address>:<length> The standard DFU upload offers no means for the host to request a certain length (or start), the device will simply transfer what should be the full firmware (or whatever payload that will be). If the host terminates the transaction prematurely, the result is undefined. In real cases the device will often hang or act up and must be reset. The -Z / --upload-size option name is a bit misleading, this only specifies an /expected/ payload size that will be used to scale the progress bar and nothing else. This was added because there is no way for dfu-util to know how long the payload will be. Some (all?) DfuSe bootloaders from ST seem to support a sort-of normal DFU upload, and will send back a payload without any hint of start address from the host. So I have preserved this functionality in dfu-util, more as a curiosity. However the bootloader doesn't terminate the transfer itself and my testing has shown that the bootloader will crash if the upload goes beyond the end of the flash memory. I therefore hardcoded a small size that I believe is safe for all devices. I should probably add a warning if this kind of upload is tried on a DfuSe device. Regards, Tormod

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call for testing: dfu-util 0.10 RC
by Tormod Volden 27 Oct '20

27 Oct '20

Hi, I consider the current git head to be a release candidate for the upcoming 0.10 release of dfu-util, so I would be glad to see some testing on various devices. I have tested on STM32F4 and will test some custom IAP bootloaders. There are still known issues on STM32L4 and STMF0, but that has to wait for later releases. Thanks, Tormod

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Re: [Dfu-util] Patch for activating --upload-size option
by Tormod Volden 26 Oct '20

26 Oct '20

On Sat, Sep 5, 2020 at 1:30 AM Jakub Palider wrote: > Hello, > > please, review the patch and, if okay, apply it. > It was tested with some basic scenarios for the upload size and > results are backward compatible and work for relevant parameters: > > Use expected upload size when reading from device > > In order to limit transfer on wires stop transmission when > expected size is reached. Just to update the list on this: After reviewing the DFU_UPLOAD specifications and what our --expected-size option does (simply scale the progress bar), we agreed to drop this patch. Tormod [sorry for breaking the thread, the original post disappeared from my mailbox]

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