i.MX Processors中的主题 i.MX8-MEVK UART Input No Response

i.MX8-MEVK UART Input No Response

simonwan — Fri, 22 Mar 2019 18:26:05 GMT

Hi experts,

I was recently working with i.MX 8M Evaluation Kit, while the board's debug UART ports get very slow response to the keyboard inputs.

For device, I tried:

1) the preloaded Android image with EMMC boot;

2) a self-built fsl-image-validation-imx image with SD boot.

For the host side, I tried both mac OS and ubuntu-16.04 with minicom.

Right now, both images can boot up, and the UART ports can print the system logs correctly.

However, if I want to interact with the UART port like typing any command in the UART port

evk_8mq:/ $

, the UART becomes very slow, and even no response to my input after a while.

I'm wondering if anyone runs into this scenario, or knows what would be the possible reason?

Thank you in advance.

Simon

Re: i.MX8-MEVK UART Input No Response

igorpadykov — Fri, 22 Mar 2019 23:30:26 GMT

Hi Simon

one can try Demo Images from

i.MX Software | NXP

Getting Started with the i.MX 8M Evaluation Kit|NXP

and try to update UART-USB cp2105 drivers which EVK uses

USB to UART Bridge VCP Drivers - Silicon Labs

Schematics
Design Files for the i.MX 8M Evaluation Kit (EVK)(REV 0)
i.MX 8M Evaluation Kit | NXP

Best regards
igor
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Re: i.MX8-MEVK UART Input No Response

simonwan — Mon, 25 Mar 2019 22:01:27 GMT

Thanks for the answer. After I update several things the UART works fine so I guess it should be a driver issue.