MCUXpresso IDE中的主题 Re: LPC-LinkII UCom Port

LPC-LinkII UCom Port

JiaAn — Mon, 28 Jun 2021 06:51:40 GMT

Hi,

When I use my LPC-Link-2 to debug another LPC-Link-2. I found a port called "LPC-LinkII UCom Port"

What is this port for?

Can I use this port to communicate with LPC-Link-2? I use UART to transfer data now. But if I can use this port it will be awesome.

Re: LPC-LinkII UCom Port

ZhangJennie — Mon, 28 Jun 2021 08:38:15 GMT

When use LPC-Link2 as LPC4370 development evaluation board, LPC-LinkII UCom Port is used as a simulated USB COM interface to communicate on board LPC4370.

Whe use LPC-Link2 as a debug probe for another target board, LPC-LinkII UCom can't work as UCOM for other target board MCU.

Hope this helps.

Best Regards

Jun Zhang

Re: LPC-LinkII UCom Port

JiaAn — Mon, 28 Jun 2021 08:57:00 GMT

@ZhangJennie

Thanks for the help!

I would like to know is there any example code for using UCom? How should I use UCom while I use LPC-Link2 as LPC4370 development evaluation board?

Re: LPC-LinkII UCom Port

ZhangJennie — Tue, 29 Jun 2021 08:59:35 GMT

Hi JiaAn
I just check LPC-Link2 board. This board is different. It has LPC4370 but no on-board debug link interface. By default, LPCOpen library will probably be redirecting printf to UART. For LPC-Link2 board, it prints to LPC_USART2. check schematic, USART2 is not routed to any UCOM related interface. Thus it's not possible to print data to LPC-LinkII UCom Port.

There is some historical factors regarding this board design. see discussion below:

https://community.nxp.com/t5/MCUXpresso-General/LPC-LINK2-VCOM-port/m-p/1009331

Have a nice day

Jun Zhang

Re: LPC-LinkII UCom Port

brendonslade — Fri, 06 Aug 2021 22:36:22 GMT

Note that we now have the (lower cost) MCU-Link debug probe ($10.99 from NXP) that has a VCOM port available via a header. If you are ok with SWD debug (not requiring JTAG) then this might be a good option. https://www.nxp.com/demoboard/mcu-link.