how to make nrf dongle to enter reset by using software

RE: how to make nrf dongle to enter reset by using software

Hung Bui — Mon, 31 May 2021 08:11:44 GMT

Hi,

The fundamental difference between the DK and the dongle is that the dongle doesn't have a programmer on board. Any communication for programming with the dongle is via a bootloader.

So if the dongle is unresponsive it won't be able to do any command because the CPU is blocked.

If you want to trigger a reset, you can think of connecting a DK (or a programmer) to the dongle ( you need to solder the header on the P1 port). You can use nrfjprog --reset when you connect the programmer/DK to the dongle.

But then it's not much point using a dongle, you can just use the DK.

RE: how to make nrf dongle to enter reset by using software

Dien Nguyen — Sat, 29 May 2021 05:09:39 GMT

i want to know is there any message to make dongle reset, such as nrfjprog --reset, it work with DK board. i see an option -f on nrfutil command for update dfu over ble, is it an option to make dongle reset?

RE: how to make nrf dongle to enter reset by using software

Dien Nguyen — Sat, 29 May 2021 05:04:45 GMT

i've thought this before, i suppose that using it too often :)))
it would be better if i can send the reset command than make some change in the firmware

RE: how to make nrf dongle to enter reset by using software

Hung Bui — Fri, 28 May 2021 12:18:52 GMT

Hi Dien,

When the dongle gets unresponsive, I don't think it would process any command from PC.

How about implementing WDT (Watch Dog Timer) in the dongle firmware ? It would reset the dongle automatically if there is a crash.

RE: how to make nrf dongle to enter reset by using software

Dien Nguyen — Fri, 28 May 2021 09:49:10 GMT

i mean, i will reset it periodically for example, before I can't connect to dongle

RE: how to make nrf dongle to enter reset by using software

awneil — Fri, 28 May 2021 09:23:06 GMT

[quote userid="92965" url="~/f/nordic-q-a/75751/how-to-make-nrf-dongle-to-enter-reset-by-using-software"]somethime i can not able to access to send some command[/quote][quote userid="92965" url="~/f/nordic-q-a/75751/how-to-make-nrf-dongle-to-enter-reset-by-using-software"]i can not find any command to make dongle reset by using nrfutil command. [/quote]

If you can't send any commands anyhow, then having a 'Reset' command wouldn't help - because you can't send commands!