nrf52832 and USB functionality

RE: nrf52832 and USB functionality

Sigurd — Fri, 21 Aug 2020 09:24:46 GMT

[quote user="LASHCA@PIETERSE"]If I'm understanding you correctly... I could wire the SWDIO and SWDCLK to the USB port. From there on I could connect my nrf52 DK to the PCB via USB and flash the PCB? [/quote]

No, you need a programmer/debugger for this. On our development kits we have a on-board programmer(J-Link OB) that we use. See this link.

[quote user="LASHCA@PIETERSE"]I want to be able to flash my pcb by using the USB port[/quote]

Since you are only using the USB port for charging now, and since this is a nRF52832 (and not a nRF52840/nRF52833/nRF52820 that has on-chip USB support), I think you would need to redesign the PCB to achieve this. In order to flash the chip with fw over a USB port on the PCB, you would need either

A on-board programmer on the PCB(e.g. J-Link OB)
A USB-to-UART bridge chip(with a serial bootloader already flashed to the chip)
nRF52840/nRF52833/nRF52820 that has on-chip USB support(with a USB bootloader already flashed to the chip).

RE: nrf52832 and USB functionality

LASHCA@PIETERSE — Thu, 20 Aug 2020 21:18:52 GMT

Thanks for the response. I did not design the PCB but I am working with it now and want to make improvements. mainly, I want to be able to flash my pcb by using the USB port.
If I'm understanding you correctly... I could wire the SWDIO and SWDCLK to the USB port. From there on I could connect my nrf52 DK to the PCB via USB and flash the PCB?

RE: nrf52832 and USB functionality

Sigurd — Tue, 18 Aug 2020 11:30:28 GMT

Hi,

Segger RTT uses the SWD lines, so you need a Segger J-Link debugger/programmer in order to use RTT.

RE: nrf52832 and USB functionality

Erick_s — Tue, 18 Aug 2020 05:15:17 GMT

Hello!

Did you make this PCB? There's definitely a way to do it through USB, just take as an example the nRF52 DK. But as a principle, you should've done this while projecting the board since making this change now can be a bit uncomfortable. That's of course if you didn't connect your USB to these pins before.