i.MX Processors中的主题 iMX8 EVK USB SDP

iMX8 EVK USB SDP

simonlocke — Mon, 07 Jan 2019 14:39:52 GMT

I'm trying to build the uboot image from source and download to the iMX8M EVK. I'm starting from the latest 'linux-sumo' 4.14.78 source found here:

https://source.codeaurora.org/external/imx/imx-manifest/tree/?h=imx-linux-sumo

Everything builds as expected and I can produce a "imx-boot-imx8mqevk-sd.bin-flash_evk" file, which I have selected with the manufacturing tool cfg files (I have previous experience of this from work on iMX6).

The processor powers up and I can see the HID device on USB. However when I click start on MfgTool, it does something, and then goes Red to indicate failure. The Console shows the processor starting boot, doing DDR4 training, and then it stops on:

Trying to boot from USB SDP

SDP: initialise...

SDP: handle requests...

The boot does not progress beyond this. Why?? I notice that the USB device changes from the 1fc9:012b NXP device to a 0525:b4a4 Netchip Technology device. Why is this?

I can successfully boot the imx-boot image provided with the mfgtool image I have downloaded, so I know my setup is good (this image boots to uboot console, as I expect).

Why does the 'out of the box' image not work for the eval board? Is this an issue, or am I doing something wrong?

Note I have also tried booting the image using the imx_loader toolcloned from github, with much the same result.

Thanks.

Re: iMX8 EVK USB SDP

simonlocke — Mon, 07 Jan 2019 15:41:22 GMT

Note that some further experimenting today has show that the image I produced will correctly boot the processor when written to the on board MMC.

Its just that the mfgtool will not allow the image to boot correctly.

Re: iMX8 EVK USB SDP

igorpadykov — Tue, 08 Jan 2019 00:13:40 GMT

Hi Simon

latest L4.14.78 uses uuu instead mfg tool, one can check linux documentation (Linux Guide):

Linux L4.14.78_1.0.0 Documentation

https://www.nxp.com/webapp/Download?colCode=L4.14.78_1.0.0_LINUX_DOCS&appType=license&location=null

Home · NXPmicro/mfgtools Wiki · GitHub

Best regards
igor
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