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On Sunday 06 Aug 2017 18:50:07 tuxic@××××××.de wrote: |
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> Hi, |
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> |
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> sorry, this will become a little longish... |
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> |
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> Background: To program an ATMEL ATtiny85 via USB |
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> without a dedicated USB chip there is a bootloader |
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> called "micornucleys", which bitbangs the USB protocoll. |
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> This mechanism is used in Digistupms Digispark ATTtiny |
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> developmnent board (http://digistump.com/products/1). |
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> |
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> So far so ....nice? |
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> |
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> When I plug in such a little board into my PC, demesg |
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> reports: |
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> [ 1429.834140] usb 7-4: new low-speed USB device number 15 using ohci-pci |
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> [ 1429.965142] usb 7-4: device descriptor read/64, error -62 |
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> [ 1430.203151] usb 7-4: device descriptor read/64, error -62 |
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> [ 1430.438161] usb 7-4: new low-speed USB device number 16 using ohci-pci |
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> [ 1430.569151] usb 7-4: device descriptor read/64, error -62 |
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> [ 1430.803174] usb 7-4: device descriptor read/64, error -62 |
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> [ 1431.038184] usb 7-4: new low-speed USB device number 17 using ohci-pci |
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> [ 1431.456157] usb 7-4: device not accepting address 17, error -62 |
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> [ 1431.582204] usb 7-4: new low-speed USB device number 18 using ohci-pci |
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> [ 1432.000209] usb 7-4: device not accepting address 18, error -62 |
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> [ 1432.000244] usb usb7-port4: unable to enumerate USB device |
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> |
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> or similiar. lsusb does not show anything related at all. |
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> |
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> As recommended on related pages on the internet, I installed |
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> dedicated udev rules to show the needed ttyACM device. But |
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> since the kernel itsself fails to accept the device, the best |
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> udev rules will not work. |
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> |
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> My first thought was: The micronucleus bootloaed is missing or |
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> is defective... |
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> |
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> But plugging in the board into my Android tablet (the tablet runs |
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> Lollipop and is nothing special at all beside being rooted) via |
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> an OTG cable and using lsusb after that, it shows |
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> Bus 001 Device 003 ID 16d0:0753 MCS Digistump DigiSpark |
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> |
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> dmesg reports for this device to use the modyle xhci_hcd. |
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> |
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> I loaded that module by hand on my Gentoo PC and reinserted |
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> the Digispark: Nothing...same errors as before. |
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> |
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> What can I do to make this Digispark being correctly recognized? |
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> |
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> Thank you VERY much for any help in advance! |
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> |
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> Cheers |
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> Meino |
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|
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Did you compare the Android kernel and loaded modules with your Gentoo kernel? |
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|
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Did you compare lsusb and lshw for other related modules and drivers? What |
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I'm saying is there may be other modules needed like UART, serial over usb and |
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what not. |
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|
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-- |
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Regards, |
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Mick |
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