blhost on PC running Windows 11

[kt]

Hello

After updating to Windows 11 is blhost is unable to open USB HID Device.

Tested on LPC55S69-EVK.

Example blhost command:

LPC55S69 Boot-HID device is found/enumerated correct by PC:

Exact same command works fine on PC running Windows 10:

(Same PC hardware / USB connection - Windows 10 PC running as virtual machine).

Question: Why does blhost not connected to LPC55S69 bootloader when running on Windows 11 PC?

Regards Knud

[ErichStyger]

Win11 seems to have issues with USB devices in general. I just have switched to Win11 and found out the hard way.

What I'm using now is rblhost, see my article here: https://mcuoneclipse.com/2025/10/05/rblhost-exploring-rusts-role-in-embedded-development-tools/

It is implemented in Rust, without dependencies to Python. So far it works fine for me under Windows 11. So you might give it a try?

[martingcavallo]

It seems there is no fix or solution to this issue, isn't it?

We are facing the same problem. We have blhost working on two different Windows 11 machines:

 PC1

Edition Windows 11 Home Single Language
Version 24H2
Installed on ‎20/‎07/‎2025
OS build 26100.6899
Experience Windows Feature Experience Pack 1000.26100.253.0

PC2

Edition Windows 11 Pro
Version 24H2
Installed on ‎2/‎13/‎2025
OS build 26100.4946
Experience Windows Feature Experience Pack 1000.26100.197.0

However, it is not working on the next machine:

PC3

Edition Windows 11 Pro
Version 24H2
Installed on ‎24/‎4/‎2025
OS build 26100.6899
Experience Windows Feature Experience Pack 1000.26100.253.0

In summary, comparing PCs 2 and 3, it seems that it is the bild version that breaks blhost. However, comparing PCs 1 and 3, it seems to be the OS version (Home vs Pro)

[EmbeddedTech]

yes, we have been following up for more than a year and no response or solution from NXP side. After developing the bootloader, it works in some pc's and does not work in others, and it is like the waste of effort.

[jamescpi]

@Pavel_Hernandez 

We are also seeing this issue. It seems to work on Windows 11 version 21H2 but it is NOT working on a later version on a different computer.

Is there any resolution or workaround to this problem?

[jamescpi]

@Pavel_Hernandez it does NOT work on Windows 11 23H2

[EmbeddedTech]

@Pavel_Hernandez ,

We are also facing the same issue. I have also raised it few weeks back. When I testes it around March of this year it was working fine. I also had windows 11 at that time. But now it is not working. Now the Windows 11 version is 23H2. Can you please provide us some solution.

Thanks for your help in advance.

[giganxp]

Im seeing the exact same thing.  blhost usb hid works on Win 10 not Win 11.

Has this issue been resolved?

[kt]

Hi

Unfortunately not solved
Pavel Hernandez (NXP Support) does no recommend to use blhost
Pavel says that SPSDK work fine on his Win 11 setup, but it does not work on my Win 11 PC.
SPSDK also require installation of Phyton interpreter, which is to complicate for use in our product Service center.

I am still very interested in using blhost on Win 11 - maybe you are able to find solutiuon

[kt]

How did your test on Windows 11 go?

[Pavel_Hernandez]

Hello, I did the test, and this is my result.

Best regards,
Pavel

[Pavel_Hernandez]

Hello, my apologize I will test it at these days.

Best regards,
Pavel

[Pavel_Hernandez]

Hello, my name is Pavel, and I will be supporting your case, I suggest using the SPSDK this is the newest tool that has integrated a bunch of tools into one site.

Installation Guide — SPSDK documentation

Best regards,
Pavel

[EmbeddedTech]

Hi @Pavel_Hernandez ,

I am facing the similar issue. I am using the MCUBootUtility to program the board using OTA bootloader. The bootloader was working fine previously. But now when I try to connect using the BootUtility tool it is giving the following error ' Failed to ping SBL ISP component, Please double check it is SBL target!'.

I can see the USB is enumerated as HID but not able to connect to SBL. Your quick help on this is highly appreciated.

Thanks.

[kt]

Hello Pavel

Thanks a lot for fast response

Have installed SPSDK, but have more or less same problem – see screen dump below:

• nxpdevscan command is able to find LPC55S66 device.
• blhost command is not able open communication (here for a simple reset command)

But, I am looking for a ‘simpler’ tool than installing Python interpreter + SPSDK package – here blhost.exe is perfect.

Need the tool for 2 purposes:

• In production line for flash programming, read out of UUID, etc.
• For firmware update at consumer customer / product repair center.
  For this, I need simpler tool than SPSDK

Questions:

• Is my problem related to Windows 11 or do I have to look for other issues?
  If yes: When can I expect an update of blhost.exe that run on Windows 11?
  
  
• Does other simple program for firmware updating LPC55xxx CPU via USB exists?
  If yes: Any suggestion to fix my problem…

PS.: Same problem on LPC55S69-EVK and LPC55S66 used in our application

Regards Knud

[Pavel_Hernandez]

Hello, I tested it on my side and then had the same issue, but then I saw you miss a 0 on the PID section, try with 0x0020.

Let me know if the issue is still there.

Best regards,
Pavel

[kt]

Hello Pavel

Again, thanks for your reply – very appreciated.

Have made 2 new test with correct PID parameter:  No change / same problem

Best regards

Knud

[Pavel_Hernandez]

Hello, did you put the Board in ISP mode?

I test it on my side with the LPC55s69 with the HS-USB (P9) and the ISP button (S1).  

Best regards,
Pavel 

[Pavel_Hernandez]

Hello, I confirm with your image you have the ISP mode, are you using LINUX?

Best regards,
Pavel

[kt]

Hello Pavel

Yes, I press and hold S1-ISP button while plugging USB cable into P9

(boot loader only activate if S1-ISP pressed during reset)

As already written, this problem only occurs when running on Windows 11 Pro system.

If I run a virtual Windows 10 Pro on same hardware (and same PC USB port) does blhost.exe run correct.

Please try to replicate problem on PC running Windows 11 Pro…

Best regards

Knud

[Pavel_Hernandez]

Hello, I apologize I do not have at moment the board at home, my personal computer has win11, I have an OKDO, and I tested it but with VCOM.

The Win11 is communicating and is discarded, could you review if the jumpers are in default position? Could you please download the document and review the Table 1. Indicators, buttons, connectors and LEDs?

LPCXpresso55S69 Development Board | NXP Semiconductors 

Best regards,
Pavel