How to enable hardware flow control over uart

RE: How to enable hardware flow control over uart

Sigurd Hellesvik — Thu, 22 Dec 2022 11:53:27 GMT

When using the DK and use USB J2 for communication, the data goes through UART to the Debugger chip, and then the debugger chip forwards it on a virtual COM port.

The configuration I gave you is for the Debugger chip.

If you want this to more realistic for a future custom board, I recommend that you build with:

west build -p always -b nrf52840dk_nrf52840 -- -DOVERLAY_CONFIG="overlay-usb.conf" -DDTC_OVERLAY_FILE="usb.overlay"

and then connect to the J3 USB connector (nRF USB).

This way you can use the USB driver for Spinel communication instead of UART.

Regards,
Sigurd Hellesvik

RE: How to enable hardware flow control over uart

JuanAlm — Thu, 22 Dec 2022 10:18:19 GMT

nrf52840DK, but my purpose is to implement in a custom board later

RE: How to enable hardware flow control over uart

Sigurd Hellesvik — Thu, 22 Dec 2022 10:16:46 GMT

Which device are you testing this for?

Regards,
Sigurd Hellesvik

RE: How to enable hardware flow control over uart

JuanAlm — Thu, 22 Dec 2022 09:04:23 GMT

I need to do it in built...I think your post is about configuring each device 1 by 1. I need a firmware that has the HWFC enabled by default.

RE: How to enable hardware flow control over uart

Sigurd Hellesvik — Thu, 22 Dec 2022 09:00:06 GMT

Hi,

From Thread Tools:

"Disable the Mass Storage feature on the device, so that it does not interfere with the core RCP functionalities. Also, force Hardware Flow Control to avoid potential race conditions related to the auto-detection:

JLinkExe -device NRF52840_XXAA -if SWD -speed 4000 -autoconnect 1 -SelectEmuBySN SEGGER_ID
J-Link>MSDDisable
Probe configured successfully.
J-Link>SetHWFC Force
New configuration applies immediately.
J-Link>exit

Does this solve your issue?

Regards,
Sigurd Hellesvik