Issues with MCUmgr over serial with nRF52 devkit/J-Link

RE: Issues with MCUmgr over serial with nRF52 devkit/J-Link

user91845 — Tue, 08 Mar 2022 17:28:21 GMT

[quote userid="99317" url="~/f/nordic-q-a/84174/issues-with-mcumgr-over-serial-with-nrf52-devkit-j-link/356964#356964"] Do you know how to increase the upload speed?[/quote]

In the past upping the MTU will increase the update speed:

CONFIG_MCUMGR=y

CONFIG_MCUMGR_SMP_SHELL=y

CONFIG_MCUMGR_SMP_SHELL_MTU=2048

CONFIG_MCUMGR_BUF_SIZE=2050

CONFIG_MGMT_CBORATTR_MAX_SIZE=2048

CONFIG_FS_MGMT_UL_CHUNK_SIZE=2048

RE: Issues with MCUmgr over serial with nRF52 devkit/J-Link

user99317 — Tue, 08 Mar 2022 16:03:24 GMT

No problem Hakon, I will check this tomorrow and get back to you.

One other question perhaps you can help with: Do you know how to increase the upload speed? It’s taking me 3.5mins to upload one ~256KB image. I am using serial recovery mode in MCUBoot if that makes any difference.

What kind of upload speed/times do you see?

I think I read somewhere else that there is a hard coded delay of 20ms between each packet in mcumgr tool, but I’ve not investigated this.

RE: Issues with MCUmgr over serial with nRF52 devkit/J-Link

user2115 — Tue, 08 Mar 2022 11:30:16 GMT

Hi,

[quote user="FARLY7"]I just tried the suggestion from your answer in the other issue thread, and this worked.[/quote]

This is interesting!

Was the CONFIG_HEAP_MEM_POOL_SIZE set to non-zero value prior to adjusting it?

Kind regards,

Håkon

RE: Issues with MCUmgr over serial with nRF52 devkit/J-Link

user99317 — Tue, 08 Mar 2022 10:10:38 GMT

Hi Hakon,

I just tried the suggestion from your answer in the other issue thread, and this worked.

I will also test the smp_svr example again like you did. A little bit more investigation is required on my side to clarify where the issue is and how it is fixed.

Thanks,

Sean

RE: Issues with MCUmgr over serial with nRF52 devkit/J-Link

user2115 — Tue, 08 Mar 2022 09:52:32 GMT

Hi,

[quote user="FARLY7"]I saw your post on this similar issue, I will try your suggestion here and see if it works.[/quote]

That is specifically for the nrf9160dk_nrf9160_ns target.

I have seen similar issues in the past myself and disabling the MSD has usually been the fix.

I just tested ncs v1.8.0 and ncs v1.9.0, with board nrf52dk_nrf52832, stock smp_svr (w/overlay-serial.conf):

$ mcumgr --conntype serial --connstring /dev/ttyACM0 image upload zephyr/app_update.bin
 48.14 KiB / 48.14 KiB [====================================================================================] 100.00% 3.46 KiB/s 13s
Done

image list shows:

Images:
 image=0 slot=0
    version: 0.0.0
    bootable: true
    flags: active confirmed
    hash: ed10f5869785d67af2fa7d416016a6836c78c6254cd330b4446ba21b316ac2e4
 image=0 slot=1
    version: 0.0.0
    bootable: true
    flags: 
    hash: 1ffb1291735140f39b1ba1f920b14e07e26136abde2d92109ddacbd047d509a7
Split status: N/A (0)

Do you see the same behavior on other PCs as well?

Kind regards,

Håkon

RE: Issues with MCUmgr over serial with nRF52 devkit/J-Link

user99317 — Tue, 08 Mar 2022 08:46:50 GMT

Yes, I have done this already. This is one of the first things I do with a new devkit.

I have also tried different MTU sizes in the mcumgr connection parameters, but no luck.

I saw your post on this similar issue, I will try your suggestion here and see if it works.

RE: Issues with MCUmgr over serial with nRF52 devkit/J-Link

user2115 — Tue, 08 Mar 2022 08:29:01 GMT

Hi,

If you have issues with the usb-serial bridge in the debugger, it might be beneficial to disable the mass storage device in the debugger itself.

This is done by opening J-Link Commander (JLinkExe on mac/linux) and writing:

msddisable

Remember to power cycle the board afterwards before testing again.

Kind regards,

Håkon

RE: Issues with MCUmgr over serial with nRF52 devkit/J-Link

user99317 — Mon, 07 Mar 2022 13:25:36 GMT

Hi Hakon,

Sorry for the delay in response.

Yes this is using the smp_svr example. I think you should be able to easily recreate it just by flashing the smp_svr example to the nRF52 devkit and attempting to upload an image over the USB serial port.

Thanks,

Sean

RE: Issues with MCUmgr over serial with nRF52 devkit/J-Link

user2115 — Fri, 28 Jan 2022 14:45:46 GMT

Hi,

Are you seeing this issue when using the smp_svr example? Could you share the configuration that you're using so I can try to recreate the issue on my side?

Kind regards,

Håkon