NRF DFU Serial External MCU upgrade

RE: NRF DFU Serial External MCU upgrade

Sigurd — Thu, 11 Nov 2021 16:21:29 GMT

Hi,

[quote user="kvenkatraman_f"]Setting this timeout parameter addresses my issue.[/quote]

Great!

[quote user="kvenkatraman_f"]Did you get a chance to look into the bullet item 3 above on the nrf_serial_read[/quote]

As long as your not in interrupt context, I don't see why it would fail. Maybe it's related to something in these YModem_ functions.

[quote user=""]We see that nrf_serial is not present in the SDK v17.x. So, is this not supported? If we were to migrate to latest SDK in future, nrf_serial will not be available anymore?[/quote]

Correct. You would need to add nrf_serial yourself to SDK 17 to continue using it. I believe nrf_serial was deprecated and replaced with the libuarte library.

RE: NRF DFU Serial External MCU upgrade

KV — Fri, 29 Oct 2021 14:11:08 GMT

Thank you, Sigurd. Setting this timeout parameter addresses my issue. Did you get a chance to look into the bullet item 3 above on the nrf_serial_read.

RE: NRF DFU Serial External MCU upgrade

Sigurd — Tue, 26 Oct 2021 13:02:07 GMT

Hi,

[quote user=""]After the nRF52840 sends the external image packet, it waits for an ACK from the external MCU before responding to the nrfutil. We are using nrf_serial_read/write synchronous (polling) method. Since the erase times of the flash on the external MCU is in order of 4-5 seconds, the nRF52840 does not get an ACK for this time and hence cannot respond to the nrfutil which causes the nrfutil to timeout.[/quote]

It could be this "Timeout time on serial port read" that is causing the timeout: https://github.com/NordicSemiconductor/pc-nrfutil/blob/v6.1.3/nordicsemi/dfu/dfu_transport_serial.py#L153

Could you try to increase this value, and see if it solves the issue?

If it does not solve the issue, could you post the log from nrfutil here?