i.MXRT Serial Downloader USB HID Enumeration Failed

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i.MXRT Serial Downloader USB HID Enumeration Failed

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lukaszskrzypcza
Contributor II

Hi,

We're using i.MXRT1051 in our project. Because of boot source some fuses needed to be burned. Those are:

- BT_FUSE_SEL @0x06

- eMMC_BOOT @ 0x05

- eUSDHC_BOOT @ 0x05

- Default_FlexRAM_Part (1011) @ 0x2D - 448KB DTCM, 0KB ITCM, 64kB OCRAM

And now uC can't boot Serial Downloader. We get:

---===>Device Information<===---

ConnectionStatus: FailedEnumeration
Current Config Value: 0x00 -> Device Bus Speed: High (is not SuperSpeed or higher capable)
Device Address: 0x00
Open Pipes: 0
*!*ERROR: No open pipes!

===>Device Descriptor<===
*!*ERROR: bLength of 0 incorrect, should be 18
bLength: 0x00
bDescriptorType: 0x00
bcdUSB: 0x0000
bDeviceClass: 0x00
*!*ERROR: Device enumeration failure

And here's the question - is it possible that reconfiguration of FlexRAM affected Serial Downloader ?

Please help,

Thanks in advance  - Lukasz

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jeremyzhou
NXP Employee
NXP Employee

Hi Lukasz Skrzypczak,

Thank you for your interest in NXP Semiconductor products and
for the opportunity to serve you.
I'd like to know whether you try to use the UART interface to contact the MCU, as the Serial Downloader also supports the UART interface.

pastedImage_1.png
And you also can try to add a pull-up resistor to the UART_RX pin, otherwise, floating the pin may interfere with the USB enumeration process.


Have a great day,
TIC

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