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dmitrystu / libusb_stm32

Lightweight USB device Stack for STM32 microcontrollers
Apache License 2.0
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STM32F429 OTG HS: Windows says: Device Descriptor Request Failed #80

Closed IndianBoy42 closed 3 years ago

IndianBoy42 commented 3 years ago

I am mostly just using the cdc_loopback example using IRQ, the only different is it is running on thread as part of a FreeRTOS system.

There are 2 problems actually:

sometimes it gets stuck forever at: usb/src/usbd_stm32f429_otghs.c:121

        _WBC(OTG->GRSTCTL, USB_OTG_GRSTCTL_CSRST);

but most of the time it gets through that, it gets into poll() a couple of times then no more. meanwhile on my computer Windows says the USB device is not recognized and in Device Manager it says Device Descriptor Request Failed)

Is this a software problem or hardware problem? I dont know much about USB so its hard for me to tell.

IndianBoy42 commented 3 years ago

Just wanted to add: looking at dmesg in linux shows:

[269416.421657] usb 3-2: new full-speed USB device number 2 using xhci_hcd
[269416.553661] usb 3-2: device descriptor read/64, error -71
[269416.793872] usb 3-2: device descriptor read/64, error -71
[269417.029656] usb 3-2: new full-speed USB device number 3 using xhci_hcd
[269417.161666] usb 3-2: device descriptor read/64, error -71
[269417.401660] usb 3-2: device descriptor read/64, error -71
[269417.513666] usb usb3-port2: attempt power cycle
dmitrystu commented 3 years ago

It must be a hardware problem. Try to comment https://github.com/dmitrystu/libusb_stm32/blob/a9836043879ec60c205644bedf2982548b639ae6/src/usbd_stm32f429_otghs.c#L125 and https://github.com/dmitrystu/libusb_stm32/blob/a9836043879ec60c205644bedf2982548b639ae6/src/usbd_stm32f429_otghs.c#L126 Looks like this is not necessary and will stuck MCU sometimes.

IndianBoy42 commented 3 years ago

Do you have any tips about where the hardware problem is? I have 33R series resistors on DP and DM, ID is floating and no pull up resistor (stm says there is the embedded pull up on DP)

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From: Dmitry Filimonchukmailto:notifications@github.com Sent: Wednesday, February 10, 2021 12:46 AM To: dmitrystu/libusb_stm32mailto:libusb_stm32@noreply.github.com Cc: Anshuman MEDHImailto:amedhi@connect.ust.hk; Authormailto:author@noreply.github.com Subject: Re: [dmitrystu/libusb_stm32] STM32F429 OTG HS: Windows says: Device Descriptor Request Failed (#80)

It must be a hardware problem. Try to comment https://github.com/dmitrystu/libusb_stm32/blob/a9836043879ec60c205644bedf2982548b639ae6/src/usbd_stm32f429_otghs.c#L125 and https://github.com/dmitrystu/libusb_stm32/blob/a9836043879ec60c205644bedf2982548b639ae6/src/usbd_stm32f429_otghs.c#L126 Looks like this is not necessary and will stuck MCU sometimes.

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dmitrystu commented 3 years ago

I have no tips, but I removed "core soft reset" code from most OTGFS drivers when I faced the same problem on the test. Anyway, the core will be reset automatically when BUS RESET will be issued by the host.