nRF52833 Custom PCB Development Questions

RE: nRF52833 Custom PCB Development Questions

Andreas — Mon, 04 May 2020 09:41:17 GMT

Hi,

[quote user=""]A more general question, I see it is partially answered here, but is it possible to get a schematic and PCB review done through Nordic?[/quote]

This is possible, just upload your design as attachments to your message here. If you do not want other than Nordic engineers to see it you can create a 'private' ticket.

Best regards,

Andreas

RE: nRF52833 Custom PCB Development Questions

cheezballs — Sun, 03 May 2020 08:25:18 GMT

Thanks for your reply!

[quote userid="18935" url="~/f/nordic-q-a/60942/nrf52833-custom-pcb-development-questions/247728"]SWD is intended for programming and debugging, but you can(ab)use it for data transfer using Segger RTT.[/quote]

This makes sense, thank you!

[quote userid="18935" url="~/f/nordic-q-a/60942/nrf52833-custom-pcb-development-questions/247728"]The RxD and TxD can be used for an UART connection through the interface MCU into the PC host, using SEGGER drivers. This is intended for development and testing as it requires far fewer resources on the NRF chip compared to USB[/quote]

I see, thanks for that.

[quote userid="18935" url="~/f/nordic-q-a/60942/nrf52833-custom-pcb-development-questions/247728"]You can use the USB as a COM port using USB-CDC (example code in SDK)[/quote]

Is this the same principle as the virtual COM port provided by the interface MCU? Could you please be more specific on what example shows this in the SDK?

RE: nRF52833 Custom PCB Development Questions

Turbo J — Sun, 03 May 2020 07:49:11 GMT

[quote userid="89766" url="~/f/nordic-q-a/60942/nrf52833-custom-pcb-development-questions"]Are SWDIO and SWDCLK purely used for programming the SoC[/quote]

SWD is intended for programming and debugging, but you can(ab)use it for data transfer using Segger RTT.

Note: The Segger EDU you linked can only be licensed for non-commercial use.

You can use the USB as a COM port using USB-CDC (example code in SDK) on a host PC. No, the D+ and D- are pure USB and NOT UART.

You cannot use the "interface" MCU in you custom design - as you don't have complete firmware (or license from SEGGER) for it.

The RxD and TxD can be used for an UART connection through the interface MCU into the PC host, using SEGGER drivers. This is intended for development and testing as it requires far fewer resources on the NRF chip compared to USB.