Re: how to attach umodem0 to something cu can use

On Wed, Apr 22, 2026 at 04:22:49PM -0700, Mark Millard wrote:

>Is this the standard Raspberry Pi Debug Probe?

yes

>
># dmesg -a | grep -i uart
>uart0: <PrimeCell UART (PL011)> iomem 0x107d001000-0x107d0011ff irq 0 on
>acpi0
>uart0: console (115200,n,8,1)
>
>The Probe has 2 non-USB ports (and a USB port, not listed below):
>
>D (SWD)  for CMSIS-DAP
>U (UART) for UART serial
>
>Both apparently can be in use but I only connect and use the U port (as
>the serial console).

I'll need to look at it again wrt freebsd. I think
the D port was being used on the probe. I couldnt see for sure which was which.

In mitigation, the cu command did respond with 'connected'

>In my context, the USB connection is to a old macOS laptop running a
>Serial console (terminal) application.

what device name does it use?

Eventually I tried from a debian laptop and changed port on the probe, then used
i think it was procomm with the device name that was emitted when the probe
was plugged in, booted the pi5 and output was produced.
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