LPC MicrocontrollersのトピックLPC51u68 lpcxpresso51u68_dev_cdc_vcom_bm

LPC51u68 lpcxpresso51u68_dev_cdc_vcom_bm

filipecostapica — Wed, 11 Sep 2019 09:18:43 GMT

Hello to everyone.

I'm running the SDK example "lpcxpresso51u68_dev_cdc_vcom_bm" on a controller(LPC51U68JBD48E) placed on my customized board.

It is expected to: "The Virtual COM project is enumerated as a COM port, which the users can open using terminal tools, such as TeraTerm. The demo echoes back any character it receives".
I followed the user manual to connect the USB:

and the USB works fine. i.e- PC detects a COM port when I plug the USB to the PC.

But when I try to communicate trough teraTerm nothing happens so I doubt the communication is working. What am I doing wrong? Is this a windows problem?

All the best,
Filipe Costa

Re: LPC51u68 lpcxpresso51u68_dev_cdc_vcom_bm

jeremyzhou — Thu, 12 Sep 2019 07:07:12 GMT

Hi Filipe Costa,

Thank you for your interest in NXP Semiconductor products and
for the opportunity to serve you.
I've attached a tool which is able to observe the enumeration process of a new attached USB device, please use it to validate the USB CDC device enumerate successfully.
In further, I was wondering if you can share the schematic of the USB interface of your customized board for me to check.

Have a great day,
TIC

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Re: LPC51u68 lpcxpresso51u68_dev_cdc_vcom_bm

filipecostapica — Thu, 12 Sep 2019 08:37:58 GMT

Hi jeremyzhou‌,

I haven't found your attach. Can you please resend it?

Sure I can.

BLOCO_USB:

Have a great day,

Filipe Costa

Re: LPC51u68 lpcxpresso51u68_dev_cdc_vcom_bm

jeremyzhou — Mon, 16 Sep 2019 02:16:40 GMT

Hi Filipe Costa,
The USB interface seems good, and please check the attached tool.

Have a great day,
TIC

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