USB Error Codes

NOTE

This topic describes only module-specific error codes. For details about universal error codes, see Universal Error Codes.

14400001 USB Device Connection Denied

Error Message

Permission denied. Call requestRight or requestAccessoryRight to get the permission or USBDevicePipe access right first.

Description

This error code is reported if a certain API of the USB module is called but the required permission is not granted.

Possible Causes

The permission to access the USB device is not granted.

Procedure

Call requestRight to request for the permission to access the USB device.

14400002 HDC Disabled

Error Message

Permission denied. The HDC is disabled by the system.

Description

This error code is reported if HDC is disabled by the system.

Possible Causes

The USB debugging permission is not granted.

Procedure

Apply for the USB debugging permission.

14400003 Port Role Switching Unsupported

Error Message

Unsupported operation. The current device does not support port role switching.

Description

This error code is reported if port role switching is not supported. The device does not support port role switching.

Possible Causes

The port role is incorrect.

Procedure

Use the correct port role.

14400004 Service Exception

Error Message

Service exception. Possible causes: No accessory is plugged in.

Description

This error code is reported if the service is abnormal.

Possible Causes

No accessory is inserted.

Procedure

Insert the accessory.

14400005 Database Operation Exception

Error Message

Database operation exception.

Description

This error code is reported if the database operation is abnormal.

Procedure

Call the API again.

14400006 USB Device Function Unsupported

Error Message

Unsupported operation. The function is not supported.

Description

This error code is reported if the requested USB device function is not supported.

Possible Causes

The USB device function is not supported.

Procedure

Use the correct USB device function.

14401001 Target USB Accessory Unmatched

Error Message

The target USBAccessory not matched.

Description

This error code is reported if the target USB accessory does not match the device.

Procedure

Call getAccessoryList to obtain the accessory list and use a matched USB accessory to try again.

14401002 Failed to Open the Native Accessory Node

Error Message

Failed to open the native accessory node.

Description

This error code is reported if the attempt to open the native accessory node fails.

Procedure

Call the API again.

14401003 Accessory Opened Repeatedly

Error Message

Cannot reopen the accessory.

Description

This error code is reported if an accessory is opened repeatedly.

Procedure

The accessory has been opened. Continue to perform subsequent operations.

14400007 Resource Busy

Error Message

Resource busy.

Description

This error code is reported if the requested resource is in use.

Procedure

Check whether usbManager.claimInterface is successfully called.

14400008 No Device (Disconnected)

Error Message

No such device (it may have been disconnected).

Description

This error code is reported if the device cannot be identified.

Procedure

Check whether the device type is correct and whether the device is successfully connected.

14400009 Insufficient Memory

Error Message

Insufficient memory.

Description

This error code is reported if no memory is available when being requested. The maximum data size is 1 KB for a single transfer.

Procedure

Clear memory in a timely manner.

14400010 Unrecognized Error

Error Message

Other USB error. Possible causes:Unrecognized discard error code.

Description

This error code is reported if an unknown error occurs.

Procedure

Correct the error by referring to the related documentation, and try again.

14400011 No Ongoing Transfer Found

Error Message

If the transfer is not in progress, already complete, or already cancelled.

Description

This error code is reported if the current data transfer has been canceled or completed.

Procedure

Initiate a new data transfer request.

14400012 I/O Error

Error Message

Transmission I/O error.

Description

This error code is reported if the read/write operation fails because the I/O channel is abnormal.

Procedure

Try again.

31400001 Serial Port Service Error

Error Message

serial service exception.

Description

This error code is reported if the serial port service is abnormal.

Possible Causes

The process exits due to a program exception.

Procedure

Check whether the device is connected, and obtain the correct serial port number from the serial port list.

31400002 No Serial Port Device Access Permission

Error Message

no access right to serial device, call requestSerialRight first.

Description

This error code is reported if you do not have the permission to access the serial port device.

Possible Causes

You have not applied for the permission to access the serial port device.

Procedure

Call requestSerialRight to apply for the access permission.

31400003 Port Number Not Exist

Error Message

portId not exist.

Description

This error code is reported if the port number does not exist.

Possible Causes

The original port number becomes invalid because the device connection is abnormal.

Procedure

Remove and insert the device, and try again.

31400004 Port in Use

Error Message

device is using by other application.

Description

This error code is reported if the device is being used by another application.

Possible Causes

The serial port device is enabled repeatedly.

Procedure

Remove and insert the device, and try again.

31400005 Device Not Opened

Error Message

device is not open, call open first.

Description

This error code is reported if the device is not opened.

Possible Causes

A device has not been opened.

Procedure

Call the Open API to open the device before performing subsequent operations.

31400006 Transmission Timeout

Error Message

transfer timeout.

Description

This error code is reported if the data transfer times out.

Possible Causes

The peer end does not send data.

Procedure

Check whether the peer device initiates data transfer.

31400007 I/O Exception

Error Message

I/O exception.

Description

This error code is reported if an I/O exception occurs.

Possible Causes

The amount of received data in a single transfer exceeds the configured buffer size.

Procedure

Adjust the buffer size properly, and perform data transfer again.

你可能感兴趣的鸿蒙文章

harmony 鸿蒙Basic Services Kit

harmony 鸿蒙DeviceInfo

harmony 鸿蒙InitSync

harmony 鸿蒙OH_Print

harmony 鸿蒙OsAccount

harmony 鸿蒙Pasteboard

harmony 鸿蒙Print_Margin

harmony 鸿蒙Print_PageSize

harmony 鸿蒙Print_PrintAttributes

harmony 鸿蒙Print_PrintDocCallback