same situation.
So much time has passed, have you found a solution?

On Friday, March 25, 2022 at 10:51:11 PM UTC+8 Daft Soft wrote:

> Hi!
> I would advise rebuild sunxi-tools. I had problems with "usb_bulk_send() 
> ERROR -7: Operation timed out" while trying to use sunxi-tools from binary.
> Rebuilding (mostly relinking with actual libusb, I suppose) solved the 
> problem in my case.
>
> On Friday, 25 March 2022 at 10:11:01 UTC+3 haina...@gmail.com wrote:
>
>> Hi All,
>> I'm working on H616 based board and trying to execute/upload uboot using 
>> sunxi-fel but not success after many tries. 
>> I tried with windows 10 and ubuntu 20 (native, no virtualization), the 
>> device was detected but it always stuck at "usb_bulk_send() ERROR -7: 
>> Operation timed out".
>> I found that this error will appear when I try to upload a large file 
>> (larger than 32kb I think) or execute a successfully uploaded file in 
>> memory:
>>
>> sunxi-fel -v uboot u-boot-sunxi-with-spl.bin
>> Stack pointers: sp_irq=0x00021400, sp=0x00053FFC
>> MMU is not enabled by BROM
>> => Executing the SPL... done.
>> usb_bulk_send() ERROR -7: Operation timed out
>>
>> Even I tried to turn the device from FEL mode to FES mode following this 
>> article (using boot 2.0 method): https://linux-sunxi.org/FES 
>>
>> sunxi-fel version
>> AWUSBFEX soc=00001823(H616) 00000001 ver=0001 44 08 scratchpad=00027e00 
>> 00000000 00000000
>> (my device was detected at this line)
>>
>> sunxi-fel -p write 0x2000 fes1.fex
>> 100% [================================================] 31 kB, 167.4 kB/s 
>> (successfully uploaded fes1.fex, this file only 31kb) - At this step, 
>> fes1.fex is uploaded but it gave a timeout error when i tried to execute 
>> the code at that address.
>> I think the devices was hang after execute:
>> sunxi-fel -v execute 0x2000 
>> (nothing is displayed after this command line) 
>> sunxi-fel version 
>> usb_bulk_send() ERROR -7: Operation timed out
>> (timed out error) I noticed that LiveSuit or PhoenixSuit can still switch 
>> the device to FES mode to flash the firmware,
>> It could be the same method on the article above because I saw the 
>> extracted img rom contains fes1.fex and u-boot.fex but somehow it's not 
>> working for me or I have missed some steps compared to PhoenixSuit.
>> Anyone can give me some advice/suggest? I'm quite new to this process and 
>> want to learn about it. My board is Tanix TX6s (Android TV board). Best 
>> regards, NamNH
>>
>>

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