Modificare il timeout USB NAK in Windows.

Question

Il timeout USB NAK in Windows è impostato di default su 5000 ms. Come posso cambiarlo in 10.000 ms (10 sec)?

Answer 1

To do this, you need to edit Registry:

Open the Registry Editor:

Press Win R to open the Run dialog

Type "regedit" and press Enter

If brought about, allow the app to make adjustments to your tool

Navigate to the subsequent key:

HKEY_LOCAL_MACHINESYSTEMCurrentControlSetControlusbflags

If the "usbflags" key would not exist, you may want to create it:

Right-click at the "Control" folder

Select New > Key

Name it "usbflags"

Inside the "usbflags" key, create a brand new DWORD (32-bit) Value:

Right-click in the right pane

Select New > DWORD (32-bit) Value

Name it "DisableOneSec"

Set the value:

Double-click on on the new "DisableOneSec" price

Change the "Base" to "Decimal"

Enter "ten thousand" as the price (that is in milliseconds)

Click OK

Answer 2

Hello

Thank you for posting in Q&A forum

I've found the registry value about usbflags, but can't find any words relate with DisableOneSec

USB Device Registry Entries - Windows drivers | Microsoft Learn

In the words with below link, Nak timeout is not 5000 ms, it is just a response:

If the endpoint is busy at the time the data packet arrives and is not able to receive data, the device can send a NAK packet. In that case, the host starts sending PING packets to the device. The device responds with NAK packets as long as the device is not ready to receive data. When the device is ready, it responds with an ACK packet. The host can then resume the OUT transfer.

How to Send USB Bulk Transfer Requests - Windows drivers | Microsoft Learn

because it is a response action, so i think here may don't have a way to change it

Best regards

Yanhong

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